Clean Power
Architecture
a - Engine rigging center
b - Clean power harness (single fuse)
a c - Engine starting battery
b c
71862
Clean Power Options
Engine Family Configuration 2‑pin 2‑pin w/Tee 4‑pin w/Tee 4‑pin w/TVM 4‑pin w/RC
Single, Dual X X
OB DTS: L6, V6, V8
Triple, Quad X
MC DTS Single, Dual X
H.S. diesel DTS Single, Dual X X
Mid‑range diesel DTS Single, Dual X X
MC JPS Dual X
MC JPI Single, Dual X
H.S. diesel JPS Dual X X
Zeus Dual X X
Single, Dual, Triple X
JPO
Quad X X
450R DTS Single, Dual, Triple, Quad X
OB V12 Single, Dual, Triple, Quad X
90-8M0161677 eng MARCH 2021 © 2021 Mercury Marine Page 3C-5
Clean Power
Notes:
Page 3C-6 © 2021 Mercury Marine 90-8M0161677 eng MARCH 2021
14-Pin Data Harness
System Architecture
Section 3D - 14-Pin Data Harness
Table of Contents
Data Harness.....................................................................3D-2 CAN Bus Requirements............................................. 3D-3
14‑pin Data Harness Identification............................. 3D-2 CAN Terminators........................................................3D-3 3
Data Harness Pulling Procedure................................ 3D-3 CAN Routing...............................................................3D-4
CAN Architecture...............................................................3D-3 CAN Bus Drops.......................................................... 3D-4 D
90-8M0161677 eng MARCH 2021 © 2021 Mercury Marine Page 3D-1
14-Pin Data Harness
Special Tools
Data Cable Puller 888462A 1
Attaches to the end of the data harness to aid in pulling the harness through the
boat. Prevents damage to the data harness.
4618
Data Harness
14‑pin Data Harness Identification
59573
14-pin data harness
The 14‑pin data harness connects the engine or engine rigging center to the helm. On some applications—such as those that
use a TVM but not have an engine rigging center—two 14‑pin harnesses are used: one harness connects the engine to the
TVM and a second harness connects the TVM to the helm harness.
There are three types of 14‑pin data harnesses, described following.
All 14‑pin data harnesses are available in a variety of lengths. Always select the correct length harness for the application.
Connecting multiple harnesses together to span longer distances is not allowed.
Standard - Black
72385
• All 14 pins are wired, including CAN P (blue and white wires, pins G and F) and CAN H (orange and green wires, pins E
and P).
• All wires are 14 AWG.
• Cable has black sheathing with a label reading "ENGINE" at the end with the male connector.
• Used on single and dual‑engine boats with a single helm and an engine‑to‑helm harness length no greater than 10.7 m
(35 ft).
Low Loss - Black
70752
• All 14 pins are wired, including CAN P (blue and white wires, pins G and F) and CAN H (orange and green wires, pins E
and P).
• Contains five 10 AWG wires (clean power and ground, wake, junction box power and junction box ground)
• Cable has black sheathing with a label reading "LOW LOSS ENGINE END" at the end with the male connector.
• Used on:
• All triple and quad‑engine boats
• Single and dual‑engine boats with an engine‑to‑helm harness length greater than 10.7 m (35 ft)
• All multiple helm boats
Page 3D-2 © 2021 Mercury Marine 90-8M0161677 eng MARCH 2021
14-Pin Data Harness
Low Loss - Gray
70753
• Only 8 pins are wired ‑ there is no wiring for CAN P (pins G and F), CAN H (pins E and P), or trim (pins H and J)
• Power (red, black, and purple; pins A, B and C) wires are 10 gauge
• Cable has gray sheathing; a label reading "ENGINE NO CAN P/H" is at the end with the male connector, while a label
reading "HELM NO CAN P/H" is at the end with the female connector.
• Used on the inner engines on triple and quad‑engine boats
Data Harness Pulling Procedure
IMPORTANT: Do not route the data harness near high‑power VHF coax or radios. Electrical fields generated by these
components could cause interference with data transmission.
IMPORTANT: Do not route the data harness near sharp edges, hot surfaces, or moving parts. Fasten cables away from any
sharp edges, fasteners, or objects that could wear into the harness.
IMPORTANT: Avoid sharp bends in the data harness. The minimum bend radius should be 7.6 cm (3.0 in.) for the final wiring
installation.
• Daisy‑chaining or linking of 14‑pin data harnesses is not allowed. Each harness must make the required distance in one
run, due to the voltage drop in each connection. If more length is needed, order a longer harness.
• Ensure that the harness length exceeds the service length of the routing by at least 18 cm (6 in.).
To install the 14‑pin data harness:
1. Inspect the routing path to ensure that the surfaces are free of any sharp edges or burrs that could cut the harness.
2. Install the data cable puller onto the harness.
Data Cable Puller 888462A 1
3. Secure the data cable puller with two cable ties.
IMPORTANT: The cable ties must be tight to prevent any slipping during installation.
4. Carefully pull the cable through the selected route.
3836
5. Remove the data cable puller.
IMPORTANT: Carefully inspect the data harness pins to ensure that all pins are securely fastened to the data harness
connector following installation.
6. Secure the data harness with mounting clips or cable ties along the routing path where it is not contained in a rigging tube.
7. Secure the data harness with mounting clips or cable ties within 25 cm (10 in.) of the connections at either end.
CAN Architecture
CAN Bus Requirements
To avoid communication issues that could result in the loss of control, strict CAN bus length requirements must be followed:
• Maximum CAN bus length is 70 m (230 ft).
• Maximum length of any one CAN bus drop off of the main harness is 7 m (23 ft).
• Combined length of all drops should not exceed 36 m (118 ft).
• For applications that require lengths in excess of these, contact a Mercury product applications engineer (PAE).
All CAN buses must be properly terminated at both ends of the bus.
CAN Terminators
Each CAN bus has two terminators installed, one at each of the furthest ends of the bus. There are two styles of terminators:
10‑pin and 2‑pin.
90-8M0161677 eng MARCH 2021 © 2021 Mercury Marine Page 3D-3
14-Pin Data Harness
17168 29610
10-pin CAN terminator (yellow, red, or blue) 2-pin CAN terminator (blue)
IMPORTANT: Never use a yellow‑capped 10‑pin CAN terminator on a boat rigged with Next Gen DTS controls.
The cap on the 10‑pin CAN terminator can be yellow, red, or blue.
• The yellow‑capped 10‑pin CAN terminator includes two resistors: one to terminate CAN P and one to terminate CAN X.
The yellow‑capped terminator should never be used on a boat rigged with Next Gen DTS controls.
• The red‑capped 10‑pin CAN terminator includes two resistors: one to terminate CAN P and one to terminate CAN H.
• The blue‑capped 10‑pin CAN terminator includes a single resistor to terminate CAN P.
CAN Routing
Communications for the Digital Throttle and Shift system occur over three different CAN buses: CAN X, CAN P, and CAN H
(joystick piloting boats only). Because they convey different information, these CAN buses follow different routes through the
various DTS components.
• There is one CAN X bus per engine. Each CAN X bus is terminated at the helm harness and at the respective engine.
• There is one CAN P bus per boat. It connects the helm components to all engine PCMs. The routing varies, depending on
the number of engines:
• On single‑engine configurations, the CAN P bus runs from the engine to the furthest helm harness,
• On dual‑engine configurations, the CAN P bus runs from the port engine to the furthest helm harness and then back
to the starboard engine.
• On triple‑engine configurations, the CAN P bus runs from the port engine to the furthest helm harness, back to the
starboard engine, and then crosses to the center engine via a 10‑pin CAN link harness.
• On quad‑engine configurations, the CAN P bus crosses from the port inner engine to the port outer engine (via 10‑pin
CAN link harness), up to the furthest helm harness, back to the starboard engine, and then crosses to the starboard
inner engine (via a second 10‑pin CAN link harness).
• There is a maximum of one CAN H bus per boat. It terminates at the furthest helm harness and at the starboard engine (or
rigging center, if equipped).
CAN Bus Drops
When calculating total bus length, the distance from the main bus to peripheral items must be included. These "drops" off the
main bus include the following common components.
Drop off...
Component
CAN X CAN P CAN H
ERC (with integrated controller) X X X
Legacy control module (LCM) X X X
VesselView – X X
VesselView Link – X X
Joystick – – X
Electric steering helm – X X
Diagnostic port – X X
GPS unit – – X
Page 3D-4 © 2021 Mercury Marine 90-8M0161677 eng MARCH 2021
Accessories
Helm Components
Section 4A - Accessories
Table of Contents
Accessory Power/Relay Harness Kits................................4A-2 Foot Throttle Architecture......................................... 4A-11
Accessory Relay Harness Installation Options........... 4A-2 Foot Throttle On/Off Switch............................................. 4A-11
Installing the 3‑Pin Accessory Relay Harness to the Before Installing........................................................4A-11
Helm Harness......................................................... 4A-2 Installation.................................................................4A-11
Installing the 10‑Pin Accessory Relay Harness to the Junction Box.................................................................... 4A-12
Junction Box............................................................4A-2 Junction Box Mounting Dimensions..........................4A-12 4
Attaching the Accessory Relay Harness to the Boat Junction Box Installation...........................................4A-12
Hull..........................................................................4A-3 Junction Box Stacking Installation............................ 4A-13 A
Installing the Terminal Block.......................................4A-3 Junction Box Linking Methods..................................4A-14
Installing the Accessory Power Harness.................... 4A-3 Key Switches................................................................... 4A-14
Attaching Accessories To The System....................... 4A-4 Preparation............................................................... 4A-14
Important Information About 3‑Position and 4‑Position 3‑Position Key Switch Mounting............................... 4A-15
Key Switches...........................................................4A-5 4‑Position Key Switch Mounting ‑ Without Bezel......4A-15
3‑Pin Accessory Relay Harness Wiring Schematic.... 4A-5 4‑Position Key Switch Mounting ‑ With Bezel...........4A-16
10‑Pin Accessory Relay Harness Wiring Schematic Lanyard Stop Switch........................................................4A-18
................................................................................ 4A-6 Lanyard Stop Switch Surface Mount Installation...... 4A-18
Auxiliary Trim Harness Connections..................................4A-7 Lanyard Stop Switch Flush Mount Installation..........4A-19
Diagnostic Port...................................................................4A-8 Lanyard Stop Switch Flush Mount Bezel Installation
Diagnostic Port Installation......................................... 4A-8 .............................................................................. 4A-22
Diagnostic Port Architecture....................................... 4A-8 Lanyard Stop Switch Architecture.............................4A-24
ERC Extension Harnesses................................................ 4A-8 Start/Stop Switch............................................................. 4A-24
Foot Throttle.....................................................................4A-10 Bezel Removal and Installation................................ 4A-24
Required Mounting Clearances for the Foot Throttle Start/Stop T‑Harness................................................4A-25
.............................................................................. 4A-10 Start/Stop Switch Installation....................................4A-26
DTS Foot Throttle Installation...................................4A-10 Start/Stop Switch Wiring........................................... 4A-26
Foot Throttle Adapter Harness................................. 4A-10 Second Station Start/Stop Harnesses...................... 4A-27
90-8M0161677 eng MARCH 2021 © 2021 Mercury Marine Page 4A-1
Accessories
Lubricant, Sealant, Adhesives
Tube Ref No. Description Where Used Part No.
25 Liquid Neoprene Electrical connections 92- 25711 3
Accessory Power/Relay Harness Kits
Accessory Relay Harness Installation Options
These instructions cover two options for installing an accessory relay harness with a 3‑pin connector or an accessory relay
harness with a 10‑pin connector.
• The 3‑pin accessory relay harness connects directly to the helm harness. The 3‑pin relay will turn on when a 4‑position key
switch is turned to the ACC position.
• The 10‑pin accessory relay harness connects to the junction box. The 10‑pin relay will turn on when a 3 or 4‑position key
switch is turned to the ON position.
Installing the 3‑Pin Accessory Relay Harness to the Helm Harness
1. Connect the relay harness to the helm harness.
a b a - Relay harness connector
b - Helm harness connector
72417
Installing the 10‑Pin Accessory Relay Harness to the Junction Box
! WARNING
Prevent serious injury or death from a loss of boat control. Pulling on or flexing connectors can loosen terminals and cause
open or intermittent electrical connections, which will interrupt control of throttle and shifting. Do not pull on cable connectors
when pulling cables through the boat. Do not allow cables to flex at connection points. Fasten all electrical harnesses within
25 cm (10 in.) of any connection.
IMPORTANT: Do not route cables near sharp edges, hot surfaces or moving parts. Fasten cables away from any sharp edge,
fastener, or object that could wear into the cable.
1. Visually inspect the sealing ring inside the connector to ensure it is free of dirt or debris.
IMPORTANT: Never force a connector into an engine harness or junction box receptacle.
2. To install the connector to the junction box, align and insert the connector into the receptacle. Push in until connection is
locked. Listen for a click sound.
3. Fasten the harness within 25.4 cm (10 in.) of the junction box to prevent flexing of the cable.
b a - 10‑pin accessory relay harness
c b - Junction box
c - Fastener clip
20919
a
Page 4A-2 © 2021 Mercury Marine 90-8M0161677 eng MARCH 2021
Accessories
Attaching the Accessory Relay Harness to the Boat Hull
1. Using a suitable fastener, secure the harness relay in an appropriate location where it will not be exposed to excessive
moisture.
a - Relay harness assembly
b - Fastener
a
b
mc79270
Installing the Terminal Block
IMPORTANT: The terminal block must be mounted within reach of the red and purple wires of the relay harness assembly.
1. Using suitable screws, mount the terminal block under the dash at the helm.
2. Connect the red and purple wires of the relay harness assembly to the terminal block.
a - Terminal block
b - Relay harness assembly
c c - Screw
d - Red wire
e - Purple wire
d
a b
red
pur
e
c mc79269
Installing the Accessory Power Harness
IMPORTANT: The fused end of this harness must be connected at the battery.
1. Connect the red wire at the fuse to the positive terminal of the battery. Tighten securely.
2. Connect the black wire to the negative terminal of the battery. Tighten securely.
90-8M0161677 eng MARCH 2021 © 2021 Mercury Marine Page 4A-3
Accessories
3. Apply sealant to the connections at the battery.
a - 40‑amp fuse
a b - Accessory power harness
fuse
c - Red lead to positive
battery (+) terminal
d - Black lead to negative
battery (‑) terminal
b
c d
24848
Tube Ref No. Description Where Used Part No.
25 Liquid Neoprene Electrical connections 92- 25711 3
4. Route the accessory power harness from the battery to the terminal block.
5. Fasten the harness to the hull at 46 cm (18 in.) increments.
6. Connect the red and black wires from the accessory power harness to the terminal block, as shown.
e a - Accessory load requiring switched power
b - Battery positive (+) (continuous 12‑volt power)
c - Battery ground (‑)
d - Terminal block
d e - Accessory power harness
f - Accessory power relay harness
c
b
a
f
24849
Attaching Accessories To The System
IMPORTANT: All accessories attached to the system must be appropriately fused. All electrical loads added to the terminal
block must be fused individually.
1. For accessories needing key ON or ACC power: Attach accessory wiring to the terminal across from the purple wire
from the relay harness assembly.
2. For accessories needing continuous 12‑volt power (key ON or OFF): Attach accessory wiring to one of the terminals
with a red wire.
Page 4A-4 © 2021 Mercury Marine 90-8M0161677 eng MARCH 2021
Accessories
3. Connect all accessory ground wires to the terminal across from the black wire from the accessory power harness.
a - Accessory connections for key ON or ACC 12‑volt power
b - Accessory connections for continuous 12‑volt power
c - Accessory ground connections
blk
c red
b
red
a ppl
mc79268-2
4. Apply sealant to all of the electrical connections at the terminal block.
Tube Ref No. Description Where Used Part No.
25 Liquid Neoprene Electrical connections 92- 25711 3
Important Information About 3‑Position and 4‑Position Key Switches
A 3‑position key switch, when turned to the ON position, energizes the 3‑pin relay harness from the helm harness or the 10‑pin
accessory relay harness from the junction box.
A 4‑position key switch, when turned to the ON or ACC position, energizes the 3‑pin relay harness from the helm harness.
A 4‑position key switch, when turned to the ON position, energizes the 10‑pin accessory relay harness from the junction box. A
4‑position key switch, when turned to the ACC position, does not energize the 10‑pin accessory relay harness.
Key Switch/Relay Function Table
3‑Position Key Switch ON 4‑Position Key Switch ON 4‑Position Key Switch ACC
3‑pin harness Relay energized Relay energized Relay energized
10‑pin harness Relay energized Relay energized Relay not energized
3‑Pin Accessory Relay Harness Wiring Schematic
NOTE: The 3‑pin accessory connection is energized when the key switch is turned to the ON or ACC position.
IMPORTANT: All accessories attached to the system must be appropriately fused. All electrical loads added to the terminal
block must be fused individually.
c a - Battery
b - Terminal block
a b c - 3‑pin relay harness
assembly
d - Helm harness
e - Accessory power
harness
blk red
red
ppl
e
d
mc79271
LOAD
SWI TCHED
90-8M0161677 eng MARCH 2021 © 2021 Mercury Marine Page 4A-5
Accessories
10‑Pin Accessory Relay Harness Wiring Schematic
NOTE: The junction box is only energized when the key switch is turned to the ON position.
c
a b
blk red
red
ppl
e
d
mc79635-1
a - Battery
b - Terminal block
c - 10‑pin relay harness assembly
d - Junction box
e - Accessory power harness
Page 4A-6 © 2021 Mercury Marine 90-8M0161677 eng MARCH 2021
Accessories
Auxiliary Trim Harness Connections
1. Remove the lower cable tie from the ERC harness sheathing, to expose the wires within.
a
b
71495
Panel mount ERC shown, others similar
a - Lower cable tie
b - ERC harness sheathing
2. Locate and disconnect the 3‑pin ERC trim switch connector from the handle in the electronic remote control (ERC).
71264
3. Connect the auxiliary trim harness to the ERC handle trim switch and the ERC harness.
4. Return the ERC harness sheathing to its original position and secure it with a cable tie.
5. Route the auxiliary trim harness to the auxiliary trim switch (purchased separately).
6. Connect the three bullet connectors to the auxiliary trim switch.
90-8M0161677 eng MARCH 2021 © 2021 Mercury Marine Page 4A-7
Accessories
7. Secure the harness within 46 cm (18 in.) of each end.
b
a
c
71148
a - From ERC handle trim switch
b - To ERC harness
c - Bullet connectors (to auxiliary trim switch)
Diagnostic Port
Diagnostic Port Installation
The diagnostic port provides an easy external access connection to the main engine (starboard engine for multi‑engine
applications) junction box for updating software, configuring the helm, and troubleshooting with the computer diagnostic system
(CDS) or CDS G3 SmartCraft diagnostic interface tool. The diagnostic port does not need to be mounted on the dashboard if
space is limited, but can be mounted under the dashboard, or in the cabin at an inconspicuous, but accessible location.
1. Identify the location where the diagnostic port will be installed. This location must be 1.5 m (5 ft) or less from the main
engine junction box at the helm.
NOTE: A 1.8 m (6 ft) 10‑pin yellow CAN data harness without resistors must be purchased separately to connect the main
engine junction box to the diagnostic port.
2. Ensure the area that will be cut out for the diagnostic port is clear of wires and obstructions, and has adequate clearance
behind the mounting bulkhead for the diagnostic port and CAN data harness. The CAN data harness when connected to
the diagnostic port must not have a radius bend less than 76.2 mm (3 in.) and must be secured with clamps or cable ties
within 25.4 cm (10 in.) of the connections.
3. If the mounting area is constructed of fiberglass, apply masking tape to the area to prevent chipping and cracking.
4. If the mounting area is vinyl covered, remove the vinyl with a razor blade to prevent the vinyl from tearing.
5. Cut out a 52 mm (2.125 in.) hole. Ensure the opening is free of sharp edges.
6. Verify the gasket is on the diagnostic port assembly and insert the assembly into the hole. Secure the diagnostic port
assembly with the retaining nut.
7. Connect the 10‑pin yellow CAN data harness to the main engine junction box and to the diagnostic port. Secure the data
harness with clamps or cable ties.
Diagnostic Port Architecture
a - Junction box
b - Yellow CAN data harness (10‑pin)
b c - Diagnostic port
a c d - Helm harness
d
72193
ERC Extension Harnesses
These harnesses are used to extend the connections from the ERC to the helm harness. The harnesses required depend on
the number of engines:
• Single‑engine: green and blue
• Dual‑engine: green, blue, and brown
• Triple‑engine: green, blue, brown, and gray
Page 4A-8 © 2021 Mercury Marine 90-8M0161677 eng MARCH 2021
Accessories
• Quad‑engine: green, blue, brown, gray, and black
72562
Blue (CAN) ERC extension harness
72563
Green (starboard) ERC extension harness
72564
Brown (port) ERC extension harness
72566
Gray (center/starboard inner) ERC extension harness
72567
Black (port inner) ERC extension harness
90-8M0161677 eng MARCH 2021 © 2021 Mercury Marine Page 4A-9
Accessories
Foot Throttle
Required Mounting Clearances for the Foot Throttle
Find a location that has adequate clearance for the DTS foot throttle pedal plus clearance for the shoe of the operator.
b a - Pedal radius ‑ 241 mm (9.5 in.)
b - Maximum pedal travel ‑ 30º
c c - Added clearance for shoe
a d - Deck
d
3786
DTS Foot Throttle Installation
1. Route the wire harness.
2. After establishing a suitable location for mounting, mark the location.
3. Using the foot pedal base as template, mark the hole location.
4. Drill five 4 mm (5/32 in.) holes.
5. Use #12 screws and washers (not supplied with the kit) to attach the foot throttle base to the deck.
6. Connect the harness assembly to the helm harness.
7. Coil the excess harness wire and secure with a cable tie.
8. Secure the harness to the boat structure with cable ties or D‑clamps.
9. Install the cover to the Hot Foot mounting plate. Secure with the two screws provided in the kit. For wiring connections,
refer to the rigging system Installation Manual.
Foot Throttle Adapter Harness
1 2 1 - Legacy control module (LCM)
2 - Throttle on/off
3 - Foot throttle
4 - Junction box
4 3
70825
Page 4A-10 © 2021 Mercury Marine 90-8M0161677 eng MARCH 2021
Accessories
Foot Throttle Architecture
1 - Legacy control module (LCM)
1 LCM 2 - Foot throttle adapter harness
3 3 - Foot throttle
4 - Junction box
4 5 - Weather caps on unused ports
2 6 - Foot throttle ON/OFF switch
7 - Helm harness
5
6
7 THROTTLE
HAND
72194
Foot Throttle On/Off Switch
Before Installing
• Ensure that the area behind the mounting panel is free of wires or obstructions, and has adequate access for the harness
connection.
• Apply masking tape to the area to prevent chipping and cracking if the mounting area is constructed of fiberglass.
• Remove vinyl with a razor blade to prevent tearing if the mounting area is covered with vinyl.
Installation
a
b
c
d e f
70396
a - Bezel
b - Button and harness assembly
c - Screws
d - Mounting plate
e - Gasket
f - Connector
1. Identify the location where the foot throttle on/off switch will be installed. The foot throttle on/off switch should be located at
the helm within easy reach of the vessel's operator.
2. Use a hole saw to cut out a 25.4 mm (1.00 in.) hole. Ensure that the opening is free of sharp edges.
3. Use the mounting plate and a 0.125 in. drill bit to drill two pilot holes for the provided screws.
4. Secure the mounting plate and gasket to the panel with the two screws.
IMPORTANT: Do not cut the button harness or remove the harness pins from the connector.
5. Rotate the button so that it will pass through the mounting plate and pull the button and harness assembly through the
panel, gasket, and mounting plate.
6. Position the button in the mounting plate recess and snap the bezel into place.
7. Connect the harness connector to the foot throttle harness.
90-8M0161677 eng MARCH 2021 © 2021 Mercury Marine Page 4A-11
Accessories
Junction Box
Junction Box Mounting Dimensions
IMPORTANT: The mounting location should be free of excessive moisture and heat. Connections on the J‑box should have an
unobstructed access of 102 mm (4.0 in.).
a 26.0 mm 61.2 mm
(1.02 in.)
(2.41 in.)
240.0 mm
(9.45 in.)
102.0 mm
267.4 mm
(10.53 in.) (4.0 in.)
b
70778
a - 5‑way J‑box
b - Service access envelope
Junction Box Installation
NOTE: If a 5‑way Junction box is going to be stacked, a stacking hardware kit 8M0174363 is needed.
Mounting Requirements
• Mount the junction box in a location that minimizes exposure to moisture.
• Mount the junction box vertically with the plugs facing down or a flat position.
• Mount the junction box in a location that is accessible for service.
• Pre‑drill the mounting screw holes. The recommended pilot hole is 3.175 mm (1/8 in.).
• Securely attach the junction box using the screw holes provided and fasteners appropriate to the vessel's construction.
• Protect all unused connectors with weather caps.
Page 4A-12 © 2021 Mercury Marine 90-8M0161677 eng MARCH 2021
Accessories
Junction Box Stacking Installation
a
b
a
c
d
c
e
e
71764
Junction box stacking
a - #10‑ 16 x 2.5 in. SS PH Phillips AB type screws (2)
b - Upper Junction box
c - #10‑ 16 x 2.0 in. SS PH Phillips AB type screws (2)
d - Lower Junction box
e - Insert (2)
NOTE: Install the inserts diagonally from each other.
Mounting Requirements
• Mount the junction boxes in a location that is accessible for service.
• Pre‑drill the mounting screw holes. The recommended pilot hole is 1/8 in.
• Install the inserts in a diagonal pattern with the screws provided.
• Securely attach the junction box using the screws provided and fasteners appropriate to the vessel's construction.
90-8M0161677 eng MARCH 2021 © 2021 Mercury Marine Page 4A-13
Accessories
1. Install the inserts from the bottom side of the lower junction box as shown below. Match the slot in the junction box with the
slot in the insert.
b Insert view from the lower side of the lower junction box
a - Slot in the junction box
a
b - Insert slot
71788
2. Attach the lower junction box to the pre‑drilled location by installing two #10‑ 16 x 2.0 in. SS PH Phillips AB type screws
into the opposite holes that the inserts were installed.
3. Attach the upper junction box to the lower junction box by installing two #10‑ 16 x 2.5 in. SS PH Phillips AB type screws
into the holes that contain the inserts.
Junction Box Linking Methods
There are two methods of junction box linking
71789
10-pin adapter (P/N 892453A01)
71790
10-pin Y-harness (P/N 8M0165555)
Key Switches
Preparation
! WARNING
Performing service or maintenance without first disconnecting the battery can cause product damage, personal injury, or
death due to fire, explosion, electrical shock, or unexpected engine starting. Always disconnect the battery cables from the
battery before maintaining, servicing, installing, or removing engine or drive components.
Page 4A-14 © 2021 Mercury Marine 90-8M0161677 eng MARCH 2021
Accessories
1. Disconnect both battery cables.
! CAUTION
Avoid injury or product damage. Obstructions, such as braces and wiring, may be unseen when looking at the front of the
dashboard. Before drilling or cutting any holes in the dashboard, check the area behind the dashboard for obstructions. Do
not drill or cut when obstructions are present.
IMPORTANT: To ensure that water does not collect at the key switch and drains from the housing, install the key switch a
minimum of 10 degrees from vertical.
2. Select a location for the key switch on the dashboard:
• without obstructions behind the dashboard
• within harness length limits
• that will orient the switch a minimum of 10 degrees from a vertical or upright position
• that will position the switch with enough clearance between the components to install bezels, if equipped
3. If the dashboard is fiberglass, apply masking tape to the area that is to be drilled or cut to help prevent the dashboard from
cracking.
4. If the dashboard is vinyl covered, remove the vinyl from the area to be drilled or cut to keep the vinyl from tearing.
3‑Position Key Switch Mounting
1. Cut a 19 mm (3/4 in.) hole to mount the key switch assembly.
2. Install the washer over the key switch threads. Install the key switch assembly with washer through the backside of the
dashboard hole. Following the instructions on the decal, ensure the drain hole with the yellow dot points down for proper
draining after installation.
IMPORTANT: There are two notches in the key switch assembly. The notch with white plastic showing and the yellow dot
next to it is a drain hole. To properly drain the key switch, this notch must point down when installed.
3. Yellow Dot Caution! Yellow Dot
Down Drain Hole Must Face Down Down a - Drain hole
b - Yellow dot
a
b
26591
4. Install the key switch nut and tighten to the specified torque.
Description Nm lb. in. lb. ft.
Key switch nut 2.2 20 –
5. Connect the key switch electrical connector to the helm harness.
4‑Position Key Switch Mounting ‑ Without Bezel
1. Cut a 22.5 mm (7/8 in.) oblong shaped hole that matches the key switch assembly threaded end with the opposing top and
bottom flat surfaces. The shape of the hole will keep the assembly from rotating during use.
b
a - Distance between the flat surfaces ‑ 20 mm (25/32 in.)
b - Diameter of the hole ‑ 22.5 mm (7/8 in.)
a a
4734
90-8M0161677 eng MARCH 2021 © 2021 Mercury Marine Page 4A-15
Accessories
2. Install one nut onto the key switch assembly with the flat flange of the nut toward the key end of the switch. Thread this nut
on as needed until the key switch will extend through the dashboard with enough threads exposed for the second nut to be
installed.
IMPORTANT: There are two notches in the key switch assembly. The notch with white plastic showing and the yellow dot
next to it is a drain hole. To properly drain the key switch, this notch must point down when installed.
3. Install the key switch assembly into the dashboard oblong hole. Following the instructions on the decal, ensure the drain
hole with the yellow dot points down for proper draining after installation.
Yellow Dot Caution! Yellow Dot
Down Drain Hole Must Face Down Down a - Drain hole
b - Yellow dot
a
b
26591
4. Install the second key switch nut and tighten to the specified torque.
Description Nm lb. in. lb. ft.
Key switch nut 2.2 20 –
5. Connect the key switch electrical connector to the helm harness.
4‑Position Key Switch Mounting ‑ With Bezel
1. Cut or drill a 54 mm (2‑1/8 in.) diameter hole through the dashboard at the selected location.
2. Install the key switch housing assembly onto the key switch assembly.
3. Align the upper notch of the key switch assembly and housing. Following the instructions on the decal, ensure the drain
hole with the yellow dot points down for proper draining after installation.
Yellow Dot Caution! Yellow Dot
Down Drain Hole Must Face Down Down a - Drain hole
b - Yellow dot
a
b
26591
4. Install the key switch nut and tighten to the specified torque.
Description Nm lb. in. lb. ft.
Key switch nut 2.2 20 –
5. Install the cover and the bezel onto the key switch housing.
Page 4A-16 © 2021 Mercury Marine 90-8M0161677 eng MARCH 2021
Accessories
6. Install the gasket onto the key switch housing.
b
a - Gasket
a b - Key switch housing
4403
7. Insert the key switch assembly through the dash opening.
a a - Key switch housing
4058
NOTE: The ring mounting nut is threaded so that it can be installed to fit a thick or thin dashboard.
8. Install the ring mounting nut, depending on dash thickness, so that the most threads are engaged when threaded onto the
key switch housing.
b
a - Thin dashboard
b - Ring mounting nut orientation
a
3893
b a - Thick dashboard
b - Ring mounting nut orientation
a
3894
9. Position the key switch properly in the dash.
NOTE: The ring mounting nut must be tight so the assembly will not rotate during use.
10. Tighten the ring mounting nut securely.
11. Connect the key switch electrical connector to the helm harness.
90-8M0161677 eng MARCH 2021 © 2021 Mercury Marine Page 4A-17
Accessories
Lanyard Stop Switch
Many installations use the standard, flush‑mount Mercury lanyard stop switch that is supplied with any DTS electronic remote
control. A 52 mm (2 in.) bezel‑mount lanyard stop switch is available as an option.
69091
Optional lanyard stop switch with bezel mount
Wiring Clips
The use of wiring retainer clips is required for securing the lanyard stop switch leads, especially on multiple engine applications.
69092
Multiple Engine Lanyard Stop Switch Diode Harnesses
Multiple engine lanyard stop switch diode harnesses connect all of the engines to a single lanyard stop switch on the helm.
These harnesses are available in dual, triple, and quad versions.
69093
Lanyard Stop Switch Surface Mount Installation
! WARNING
Performing service or maintenance without first disconnecting the battery can cause product damage, personal injury, or
death due to fire, explosion, electrical shock, or unexpected motor starting. Always disconnect the battery cables from the
battery before maintaining, servicing, installing, or removing motor components.
1. Select the area where the lanyard stop switch will be installed.
2. Verify the underside of the console is clear of wiring and obstruction.
3. If the console is constructed of fiberglass, apply masking tape to the area to prevent chipping and cracking.
4. Drill two holes 44.4 mm (1.75 in.) apart. Use the lanyard switch housing as a template.
• The drill size for aluminum is 4 mm (0.156 in.).
• The drill size for fiberglass or wood is 4.5 mm (0.171 in.).
Page 4A-18 © 2021 Mercury Marine 90-8M0161677 eng MARCH 2021
Accessories
5. Install the lanyard switch through the lanyard switch housing and secure with the retainer.
a - Retainer
a
41521
6. Install the lanyard switch wires through the surface mounting spacer. Ensure the wire opening is facing down.
NOTE: A 10 mm (.393 in.) hole can be drilled between the two screw holes for the lanyard switch bullet connectors to be
inserted through the dashboard.
7. Secure the lanyard switch assembly to the dashboard.
• For fiberglass or wood, use the self‑tapping screws.
• For aluminum, use the 10‑32 screws and nuts.
a
Example of exposed wire mounting
a - Screws (2)
b - Surface mounting spacer
c - Wire opening
b
c 41523
8. Install the connector retainer on the underside of the console and secure with two screws obtained locally.
9. Connect the lanyard stop switch bullet connectors to the vessel harness emergency stop wire bullet connectors for single
engine applications. For multiple engine applications, connect the lanyard stop switch bullet connectors to the diode
harness bullet connectors. Refer to the appropriate wire diagram.
10. Install the lanyard switch bullet connectors in the connector retainer and secure with a cable tie.
a - Bullet connectors
c b - Connector retainer
b c - Cable tie
a
41774
Lanyard Stop Switch Flush Mount Installation
! WARNING
Performing service or maintenance without first disconnecting the battery can cause product damage, personal injury, or
death due to fire, explosion, electrical shock, or unexpected motor starting. Always disconnect the battery cables from the
battery before maintaining, servicing, installing, or removing motor components.
Fiberglass or Wood Constructed Console
1. Select the area where the lanyard stop switch will be installed.
90-8M0161677 eng MARCH 2021 © 2021 Mercury Marine Page 4A-19
Accessories
2. Verify the underside of the console is clear of wiring and obstruction.
3. Apply masking tape to the area to prevent chipping and cracking.
4. Drill two holes 44.4 mm (1.75 in.) apart. Use the lanyard switch housing as a template.
• The drill size for fiberglass or wood is 4.5 mm (0.171 in.).
5. Drill a 28.5 mm (1.125 in.) hole between the two holes.
6. Install the lanyard switch through the lanyard switch housing and secure with the retainer.
a - Retainer
a
41521
7. Install the rubber gasket over the lanyard switch wires.
8. Install the lanyard switch wires through the 28.5 mm (1.125 in.) hole in the dashboard.
a - Lanyard switch assembly
a b - Rubber gasket
c - 28.5 mm (1.125 in.) hole
b
c
41525
9. Install the lanyard switch into the dashboard opening, aligning the rubber gasket. Secure the lanyard switch with two
self‑tapping screws. Tighten the screws securely.
41781
10. Install the connector retainer on the underside of the console and secure with two screws obtained locally.
11. Connect the lanyard stop switch bullet connectors to the vessel harness emergency stop wire bullet connectors for single
engine applications. For multiple engine applications, connect the lanyard stop switch bullet connectors to the diode
harness bullet connectors. Refer to the appropriate wire diagram.
Page 4A-20 © 2021 Mercury Marine 90-8M0161677 eng MARCH 2021
Accessories
12. Install the lanyard switch bullet connectors in the connector retainer and secure with a cable tie.
a - Bullet connectors
b c b - Connector retainer
c - Cable tie
a
41774
Aluminum Constructed Console
1. Select the area where the lanyard stop switch will be installed.
2. Verify the underside of the console is clear of wiring and obstruction.
3. Drill a 50.8 mm (2.0 in.) hole.
4. Install the lanyard switch through the lanyard switch housing and secure with the retainer.
a - Retainer
a
41521
5. Insert the lanyard switch wires through the rubber gasket.
6. Install the lanyard switch wires through the 50.8 mm (2.0 in.) hole in the dashboard.
a a - Lanyard switch
b - Rubber gasket
b
41780
90-8M0161677 eng MARCH 2021 © 2021 Mercury Marine Page 4A-21
Accessories
7. Insert the two 50.8 mm (2.0 in.) 10‑32 screws through the lanyard switch and install the lanyard switch assembly to the
dashboard.
41781
8. Align the rubber gasket and secure the lanyard switch with the mounting clamp, two washers and 10‑32 nuts. Tighten the
nuts securely.
NOTE: The mounting clamp can be cut to adjust for different thickness dashboards to ensure sufficient thread engagement
with the nuts.
a a - 10‑32 nut (2)
b b - Washer (2)
c - Mounting clamp
c
41782
9. Install the connector retainer on the underside of the console and secure with two screws obtained locally.
10. Connect the lanyard stop switch bullet connectors to the vessel harness emergency stop wire bullet connectors for single
engine applications. For multiple engine applications, connect the lanyard stop switch bullet connectors to the diode
harness bullet connectors. Refer to the appropriate wire diagram.
11. Install the lanyard switch bullet connectors in the connector retainer and secure with a cable tie.
a - Bullet connectors
c b - Connector retainer
b c - Cable tie
a
41774
Lanyard Stop Switch Flush Mount Bezel Installation
! WARNING
Performing service or maintenance without first disconnecting the battery can cause product damage, personal injury, or
death due to fire, explosion, electrical shock, or unexpected motor starting. Always disconnect the battery cables from the
battery before maintaining, servicing, installing, or removing motor components.
1. Select the area where the lanyard stop switch will be installed.
Page 4A-22 © 2021 Mercury Marine 90-8M0161677 eng MARCH 2021
Accessories
2. Verify the underside of the console is clear of wiring and obstruction.
3. If the console is constructed of fiberglass, apply masking tape to the area to prevent chipping and cracking.
4. Drill a 53.97 mm (2.125 in.) hole.
5. Ensure the opening is free of sharp edges.
6. Install the lanyard switch wires through the mounting housing. Align the tabs on the mounting housing with the tabs on the
lanyard stop switch.
a
a - Mounting housing
b - Tabs
b
41528
7. Secure the lanyard stop switch to the mounting housing with the retainer.
41529
8. Install the lanyard stop switch wires through the rubber washer.
9. Secure the lanyard stop switch wires to the mounting housing with a cable tie.
a - Cable tie
a b b - Rubber washer
41530
10. Install the lanyard stop switch assembly into the hole in the dashboard and secure with the plastic nut included with the kit.
Tighten the nut securely.
11. Snap the bezel onto the lanyard switch housing.
12. Install the connector retainer on the underside of the console and secure with two screws obtained locally.
13. Connect the lanyard stop switch bullet connectors to the vessel harness emergency stop wire bullet connectors for single
engine applications. For multiple engine applications, connect the lanyard stop switch bullet connectors to the diode
harness bullet connectors. Refer to the appropriate wire diagram.
90-8M0161677 eng MARCH 2021 © 2021 Mercury Marine Page 4A-23
Accessories
14. Install the lanyard switch bullet connectors in the connector retainer and secure with a cable tie.
a - Bullet connectors
c b - Connector retainer
b c - Cable tie
a
41774
Lanyard Stop Switch Architecture
1 1
Single-engine Dual-engine
1 - Lanyard stop switch 1 - Lanyard stop switch
2 - Helm harness 2 - Diode pack
3 - Helm harness
2 2
72195
3
72196
1
Triple-engine 1 Quad-engine
1 - Lanyard stop switch 1 - Lanyard stop switch
2 - Diode pack 2 - Diode pack
3 - Helm harness 3 - Helm harness
2 2
3
72197 3
72198
Start/Stop Switch
Bezel Removal and Installation
The START/STOP switch is assembled with the black bezel. If the white or chrome bezel is required, remove the black bezel
and replace with the appropriate color bezel.
Page 4A-24 © 2021 Mercury Marine 90-8M0161677 eng MARCH 2021
Accessories
1. Remove the bezel by carefully pushing on three corners of the bezel.
32628
2. Align the bezel with the START/STOP switch and housing.
3. Starting at one corner, press the bezel onto the switch housing around the four corners. The bezel will snap into place.
a
a - START/STOP switch
b b - Bezel
32531
Start/Stop T‑Harness
Use the start/stop T‑harness to add start/stop switches to the helm. This harness connects between the key switch and the
helm harness.
On multi‑station boats, only the primary station has a key switch. For other helm locations, use the second station start/stop
harness.
70764
90-8M0161677 eng MARCH 2021 © 2021 Mercury Marine Page 4A-25
Accessories
Start/Stop Switch Installation
! WARNING
Performing service or maintenance without first disconnecting the battery can cause product damage, personal injury, or
death due to fire, explosion, electrical shock, or unexpected engine starting. Always disconnect the battery cables from the
battery before maintaining, servicing, installing, or removing engine or drive components.
! CAUTION
Avoid injury or product damage. Obstructions, such as braces and wiring, may be unseen when looking at the front of the
dashboard. Before drilling or cutting any holes in the dashboard, check the area behind the dashboard for obstructions. Do
not drill or cut when obstructions are present.
1. Disconnect both battery cables.
2. Select an appropriate dashboard location for the start/stop switch.
3. Drill a 54 mm (2‑1/8 in.) mounting hole using a hole saw.
4. Place the gasket onto the back side of the start/stop switch.
5. Place the start/stop switch into the dashboard.
NOTE: For thick dashboards, reverse the retainer nut for additional thread engagement.
6. Secure the switch in place with the retainer nut.
a b a - Retainer nut
c b - Dashboard
c - Gasket
d d - Start/stop switch
32576
7. Connect the switch to the helm harness.
Start/Stop Switch Wiring
Single-engine
1 - Key switch connection
2 - Start/stop switch connection
3 - Start/stop T‑harness
1 2 4 - Key switch connector on helm harness
3
4
72199
Page 4A-26 © 2021 Mercury Marine 90-8M0161677 eng MARCH 2021
Accessories
Dual-engine
1 - Key switch connections (2)
2 - Start/stop switch connections (2)
1 2 3 - Start/stop T‑harness
3 4 - Key switch connector on helm harness
3
4 4
72200
Triple-engine
1 - Key switch connections (3)
1 2 2 1 2 - Start/stop switch connections (3)
3 - Start/stop T‑harness
3 3 4 - Key switch connectors on helm harness
3
4 4 4
72201
Quad-engine
1 - Key switch connections (4)
2 - Start/stop switch connections (4)
1 2 1 2 1 3 - Start/stop T‑harness
4 -
Key switch connectors on helm harness
3 3 3 3
4 4
72202
Second Station Start/Stop Harnesses
These harnesses are needed to add a dash mounted start/stop pad at a second or third station. The ERC already has an
integrated start/stop button, so a start/stop pad is not required.
1
Single-engine harness
1 - Start/stop switch
2 - ERC connector (to helm harness)
3 - ERC connector (to ERC harness)
4 - Warning horn
5 - Blue ERC connector (CAN P)
6 - Single‑engine second station start/stop harness
6
2 3
4 5 72572
90-8M0161677 eng MARCH 2021 © 2021 Mercury Marine Page 4A-27
Accessories
1
Dual-engine harness
1 - Start/stop switch
2 - ERC connectors (to helm harness)
3 - ERC connectors (to ERC harness)
4 - Warning horn
5 - Blue ERC connector (CAN P)
6 - Dual‑engine second station start/stop harness
6
2 3
4
5
72573
1 Triple-engine harness
1 - Start/stop switch
2 - ERC connectors (to helm harness)
3 - ERC connectors (to ERC harness)
4 - Warning horn
5 - Blue ERC connector (CAN P)
6 - Triple‑engine second station start/stop harness
6
2 3
4
5
72574
Page 4A-28 © 2021 Mercury Marine 90-8M0161677 eng MARCH 2021
Accessories
1
Quad-engine harness
1 - Start/stop switches
2 - ERC connectors (to helm harness)
3 - ERC connectors (to ERC harness)
4 - Warning horn
5 - Blue ERC connector (CAN P)
6 - Quad‑engine second station start/stop harness
6
2 3
4
5
72576
90-8M0161677 eng MARCH 2021 © 2021 Mercury Marine Page 4A-29
Accessories
Notes:
Page 4A-30 © 2021 Mercury Marine 90-8M0161677 eng MARCH 2021
Joystick and Electric Steering
Helm Components
Section 4B - Joystick and Electric Steering
Table of Contents
CAN Adapters....................................................................4B-2 Remote Joystick.................................................................4B-3
CAN H Adapter...........................................................4B-2 Component Installation...............................................4B-3
CAN P Adapter........................................................... 4B-2 Component Connections............................................ 4B-4
Connection Diagram...................................................4B-2
4
B
90-8M0161677 eng MARCH 2021 © 2021 Mercury Marine Page 4B-1
Joystick and Electric Steering
CAN Adapters
CAN adapters allow the inclusion of other CAN‑based controls, such as a joystick or electric steering helm.
CAN H Adapter
The CAN H adapter connects between the green (12‑pin) connector on the ERC and the green (12‑pin) connector on the helm
harness. This adapter allows two CAN H devices (such as a joystick and electric steering helm) to be inserted into the control
system.
72206
CAN H adapter
CAN P Adapter
The CAN P adapter connects between the blue (6‑pin) connector on the ERC and the blue (6‑pin) connector on the helm
harness. This adapter allows one CAN P device (such as an electric steering helm) to be inserted into the control system.
72207
CAN P adapter
Connection Diagram
1 - Electric steering helm
2 - Joystick
1 3 - CAN H adapter
4 - CAN P adapter
5 - ERC harness (partial)
6 - Helm harness (partial)
2
3 4
5 6
72623
Page 4B-2 © 2021 Mercury Marine 90-8M0161677 eng MARCH 2021
Joystick and Electric Steering
Remote Joystick
A remote joystick kit is used on joystick piloting systems where joystick control is needed and an ERC is not. The kit can be
plugged into any helm junction box and then extended by a 10‑pin yellow data cable to the remote joystick location.
1
2
7
4
6
3
5
71020
1 - Remote joystick harness
2 - Remote joystick E‑stop harness
3 - Remote joystick LCM harness
4 - Shadow pack resistor (#93)
5 - Remote joystick LCM
6 - Premier joystick
7 - E‑stop rocker switch
Component Installation
• Before installation, lay out all of the components to ensure that the harnessing reaches the desired locations.
• To install the following components, use the templates and mounting hardware supplied with the components:
• Remote joystick LCM
• Premier joystick
• E‑stop rocker switch
• Connect components as shown in Component Connections. Ensure that all connections are secure.
• Secure harnesses appropriately.
• Ensure that all unused connectors are weather capped.
90-8M0161677 eng MARCH 2021 © 2021 Mercury Marine Page 4B-3
Joystick and Electric Steering
Component Connections
1 - Yellow 10‑pin data cable (purchased
5 separately)
2 - CAN terminator (one each installed on
remote joystick harness and remote
4 joystick LCM harness)
3 3 - Remote joystick harness
4 - E‑stop rocker switch
5 - Premier joystick
6 - Shadow resistor pack (#93)
1 2 NOTE: For second station, replace with
#94.
7 - Remote joystick E‑stop harness; refer
to E‑Stop Harness Connections
11 8 - Junction box (not included in kit)
9 - Helm harness (not included in kit)
LCM
10 - Remote joystick LCM harness
11 - Remote joystick LCM
10 6
9
7
8
2
70947
E-Stop Harness Connections
a b c d
g f
e
71023
a - Diode pack (to helm harness lanyard connectors, not shown)
b - Label "DIODE PACK"
c - Label "LANYARD"
d - Lanyard switch
e - Connect to remote joystick LCM harness
f - Label "REPLICATOR DIODE PACK"
g - Replicator diode pack (to replicator harness lanyard connectors, not shown)—used only on 5 and 6 engine applications
Page 4B-4 © 2021 Mercury Marine 90-8M0161677 eng MARCH 2021
DTS System Configuration
System Configuration
Section 5A - DTS System Configuration
Table of Contents
Connecting and Starting CDS G3......................................5A-2 Getting Started...................................................................5A-4
Connection to the Diagnostic Connector.................... 5A-2 Active Trim.........................................................................5A-7
Connection to the Junction Box..................................5A-2 Introduction to Active Trim.......................................... 5A-7
Starting CDS G3.........................................................5A-3 Active Trim ERC Controls...........................................5A-7
If CDS G3 Does Not Communicate with the System Active Trim Operation................................................. 5A-8
................................................................................ 5A-3 Selecting the Correct Profile.......................................5A-9
Helm Setup........................................................................ 5A-4 Active Trim Red Status Light.................................... 5A-10
5
A
90-8M0161677 eng MARCH 2021 © 2021 Mercury Marine Page 5A-1
DTS System Configuration
Special Tools
Male to Male 10 Pin Adapter 84‑892452A01
Allows connection between CAN P communications cable and Computer
Diagnostic System in applications where a junction box is not used.
4621
Connecting and Starting CDS G3
Connection to the Diagnostic Connector
1. Insert the CDS G3 SmartCraft diagnostic interface USB connector into a powered USB port.
2. Connect the SmartCraft diagnostic interface 9‑pin connector to the CAN P/CAN H adapter harness 9‑pin connector.
a - Computer
b - CDS G3 SmartCraft diagnostic interface
a c - CAN P/CAN H adapter harness
d - Connect to the vessel's diagnostic connector
c
b
d
47946
3. Connect the CAN P/CAN H adapter harness to the vessel's diagnostic connector. Refer to the operator's manual for
location of the diagnostic connector.
55479
Diagnostic port cover
IMPORTANT: Not all vessels are equipped with a diagnostic connector.
Connection to the Junction Box
1. Insert the CDS G3 SmartCraft diagnostic interface USB connector into a powered USB port.
2. Connect the SmartCraft diagnostic interface 9‑pin connector to the CAN P/CAN H adapter harness 9‑pin connector.
3. Connect the CAN P/CAN H adapter harness to the junction box.
Page 5A-2 © 2021 Mercury Marine 90-8M0161677 eng MARCH 2021
DTS System Configuration
IMPORTANT: Many vessels have difficult access paths to reach the junction box. In these vessels, you may encounter a
yellow CAN cable. The yellow CAN cable can be connected to the CDS G3 CAN P/CAN H adapter harness using either a
male‑to‑male adapter or a junction box. This provides CDS G3 with connection to the system.
IMPORTANT: Ensure that the correct termination resistor is installed on the CAN P and CAN H bus. The buses must be
properly terminated for the tool to communicate. Improper termination will result in communication errors or complete loss
of communication.
a - Computer
b - CDS G3 SmartCraft diagnostic interface
a c - CAN P/CAN H adapter harness
d - Connect to junction box or yellow cable
c
b
d
47946
Male to Male 10 Pin Adapter 84‑892452A01
Starting CDS G3
With the CDS G3 computer correctly connected to the system, and the CDS G3 program running, turn the key to the ON
position. The CAN P indicator should turn green, indicating that CAN traffic exists between the PCM and the computer.
52539
CAN traffic indicators
The CAN indicators will let you know the communication status on CAN P and CAN H.
Green—The computer is communicating on the CAN bus.
Yellow—The computer is communicating with the cable but no data is being received on the CAN bus.
Red—The computer is not connected to the SmartCraft diagnostic interface cable.
If CDS G3 Does Not Communicate with the System
Is the CDS G3 CAN P traffic indicator icon red or yellow? If it is red, the SmartCraft diagnostic interface is not connected,
®
not recognized by Windows , or not configured correctly in the CDS G3 options menu. This is not a CAN issue, but rather a
computer issue.
Improper installation of CDS G3 driver software can result in disabling a USB port from communicating with the CDS G3
diagnostic cable. Try moving the CDS G3 diagnostic interface cable from the current USB port to an alternative port to see if
this resolves the red CAN P/CAN H.
If the indicator is yellow, the SmartCraft diagnostic interface is connected and communicating with the CDS G3 program
through the USB port, but it is not communicating with the CAN bus configured in the port mapping menu in the CDS G3
options menu. Ensure that the key switch is in the ON position and that the proper termination resistance is being used.
90-8M0161677 eng MARCH 2021 © 2021 Mercury Marine Page 5A-3
DTS System Configuration
NOTE: Each SmartCraft diagnostic interface is identified by its serial number in the software. If multiple cables are used on the
same laptop, the port mapping may be incorrect for the serial number cable you currently have connected. If the indicator is
green, the cable is communicating properly with the CDS G3 program and the CAN bus it is mapped to.
Is the SmartCraft diagnostic interface’s PWR LED illuminated continuously? This indicates the cable is recognized by the
computer and is communicating with the computer.
With the key switch in the ON position, is the BUS 1 LED illuminated on the SmartCraft diagnostic interface? If it is off,
the cable is not communicating on the CAN P bus. Verify proper CAN P bus termination and operation.
If CDS G3 does not communicate with the system:
1. Ensure that the key is in the ON position, and that the boat's gauges light up. If there is no gauge activity, no warning horn
self test, or no other indication that the boat is powering up, troubleshoot accordingly.
2. Ensure that the SmartCraft diagnostic interface is properly connected. Check the
• USB port on the computer
• 10‑pin CAN connector at the engine or helm
• Terminator adapter cable used when needed to provide proper CAN P and H termination
3. Unplug the diagnostic interface at both ends, wait a few minutes, and plug it in again.
4. Try rebooting your computer after all the connections have been made.
5. If this does not resolve the issue, contact Mercury Product Support.
Helm Setup
Most ERCs and LCMs are programmed from the factory with base DTS software. Adding features or hardware may require the
ERC or LCM to be reprogrammed by the CDS G3 service tool. Once all components have been installed, connect the CDS G3
service tool to determine if there are any updates or remaining setup steps to be completed.
Getting Started
1. Plug the SmartCraft interface cable into the USB port on the CDS G3 computer.
2. On the CDS G3 HOME screen, the CAN P indicator (lower left corner) should be green.
3. Turn ON the ignition keys.
70575
Page 5A-4 © 2021 Mercury Marine 90-8M0161677 eng MARCH 2021
DTS System Configuration
4. Click Start Scan. CDS G3 will scan the boat for modules. When it is finished, CDS G3 will display a scan complete
message.
70480
5. CDS G3 will check for any further configuration steps needed. Some of those steps may include:
a. Assign City ID ‑ Assigns locations of the helm CCMs.
b. Lever Adapt ‑ Assigns PCM and TVM locations.
c. Trackpad Config ‑ Assigns different trackpad locations, which is commonly needed on multi‑helm boats.
d. Wheel Setup ‑ Assigns the helm location of an electronic steering helm.
e. Helm Setup ‑ Assigns the helm location of a joystick piloting system.
6. Once all configuration steps are completed, click NEXT. The Home screen will add the MODULE DATA,
CONFIGURATION, DIAGNOSTICS, and REFLASH buttons.
7. Check for any action items on the Home Screen. Some of these action items are required to complete the setup.
72552
Further configuration may be needed depending on your system. Use the following chart to determine if further configuration
steps are required.
90-8M0161677 eng MARCH 2021 © 2021 Mercury Marine Page 5A-5
DTS System Configuration
SD with Joystick and Thrusters 2 X X 2 HELM ONLY X 2 HELM ONLY X X X OPT X OPT X OPT
Electric Steering SD 2 X X 2 HELM ONLY X X X X X OPT X OPT
2‑6 X X 2 HELM ONLY X X X X X X OPT X OPT
OB
2 HELM ONLY X X X X X OPT X OPT
1
X
X
JPI 1‑2 X X 2 HELM ONLY 2 HELM ONLY X X OPT OPT
Zeus 2‑4 X X 2 HELM ONLY X 2 HELM ONLY X X X OPT X X OPT OPT
Joystick JPS (Diesel) 2 X X 2 HELM ONLY X 2 HELM ONLY X X X OPT X OPT X OPT
5‑6 X X 2 HELM ONLY X 2 HELM ONLY X X X OPT X X OPT X OPT
JPO
2‑4 X X 2 HELM ONLY X 2 HELM ONLY X X X OPT X X OPT X OPT
2‑4 X X 2 HELM ONLY X OPT
DTS DTS
1 2 HELM ONLY 2 HELM ONLY 2 HELM ONLY X OPT
Number of engines Helm Setup>Assign City ID ‑ Assigns CCM locations Helm Setup>Lever Adapt ‑ Assigns PCM and TVM locations Trackpad Config ‑ Assigns IDs for multi‑helm boats Wheel Setup ‑ Assigns helm location Joystick Setup ‑ Assigns helm location (multi‑station only) ERC Reflash ‑ Need to convert DTS to XXX Vessel Personality ‑ Imports Vessel Personality Wheel Setup ‑ Centers the wheel Aux Joystick Config ‑ Sets up remote joystick (if applicable) JPO S
System Type
Page 5A-6 © 2021 Mercury Marine 90-8M0161677 eng MARCH 2021
DTS System Configuration
Active Trim
Introduction to Active Trim
Active Trim is Mercury Marine’s patented GPS‑based automatic trim system. This intuitive, hands‑free system continually
adjusts engine or drive trim for changes in operating conditions to improve performance, fuel economy, and ease of operation.
It responds to boat maneuvers with precision and delivers a better overall driving experience. No knowledge of trimming an
engine or drive is needed to take advantage of Active Trim.
• As the boat accelerates, the engine or drive will trim out.
• As the boat decelerates, for example, while making a turn, the engine or drive will trim in.
• Active Trim can be overridden at anytime by using the regular, manual trim buttons.
• Active Trim allows the boat operator to compensate for changes in boat load, driver preferences, and weather conditions
while maintaining full automatic control.
Modes of Operation
The Active Trim system has four modes of operation:
1. Idle speeds
Maintains the existing trim position.
61896
2. Acceleration (hole shot)
Tucks the engine or drive under to minimize bow rise and improve time‑to‑plane.
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3. Planing speeds
Progressively trims the engine or drive based on GPS speed to maintain the most efficient
running attitude.
61898
4. Override
When the boat operator uses manual trim, the Active Trim system is immediately overridden,
returning full control to the operator.
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Setup and Configuration
Refer to your authorized Mercury dealer for setup and configuration instructions.
Active Trim ERC Controls
IMPORTANT: Authorized Mercury dealers have the ability to disable the Active Trim feature. In this case, the Active Trim
buttons and lights on the ERC will not function.
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DTS System Configuration
Use the buttons and lights on the ERC to control the Active Trim feature.
b
a c
b
71956
Active Trim controls on the ERC
Ref Control/LED Function
ACTIVE TRIM button Turns the Active Trim feature ON or OFF.
Provides Active Trim status information:
• A constant amber light indicates that the system is working normally.
a • A flashing amber light indicates that the Active Trim system is not controlling trim (user
System status light
override). Press the ACTIVE TRIM button to resume Active Trim control.
• A flashing red light indicates a problem with the system. Refer to Active Trim Red
Status Light.
Up (▲) ‑ Changes the adjustable trim profile to a more aggressive trim curve (more trim
b PROFILE select buttons (▲ angle).
and ▼) Down (▼) ‑ Changes the adjustable trim profile to a less aggressive trim curve (less trim
angle).
Indicates the adjustable profile currently engaged. 1 is the least aggressive trim profile; 5 is
Selected profile indicator
c LEDs (1, 2, 3, 4, 5) the most aggressive.
NOTE: If the LED indicators are flashing, Active Trim is in setup mode.
Active Trim Operation
• Active Trim automatically controls trim to maintain the optimum engine or drive position based on engine RPM and boat
speed.
• Active Trim progressively trims out the engine or drive to maintain an efficient running attitude.
• Active Trim will maintain the last known trim position when operating at speeds in excess of 80 km/h (50 mph).
• Operation above 80 km/h (50 mph) may require trim adjustments using the panel mounted or control handle trim position
switch.
• Active Trim will gradually return the engine or drive to the down position during deceleration.
• Active Trim will only function when the engine or drive is in the normal trim range.
GPS
Active Trim uses a GPS signal to determine vessel speed. The Active Trim system will not automatically control trim until the
GPS unit has acquired a signal.
Resume Functionality
If the boat operator overrides the Active Trim system at planing speeds using the trim button, or exceeds 80 km/h (50 mph), the
system will stop controlling the trim. Active Trim will resume automatically under the following conditions:
• Override occurred above 80 km/h (50 mph) and the boat operator then decelerates to below 80 km/h (50 mph).
• Override occurred above 80% of the rated engine RPM and the boat operator then decelerates to below 80% of the rated
engine RPM.
• Override occurred in the cruising speed range and then the boat operator decelerates to idle. Active Trim will become
active on the next acceleration.
Shallow Water Operation
Active Trim cannot detect water depth and will not trim up automatically in shallow water. The boat operator will need to
override Active Trim by trimming the engine or drive manually or pressing the Active Trim button.
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DTS System Configuration
Trailer Position
Placing the engine or drive in trailer position—over 50% of the adapted trim range, will prevent Active Trim from engaging. Any
time the engine or drive is trimmed above its normal range—to navigate shallow water, launch the boat from a trailer, or load
the boat onto a trailer, for example—you must manually trim down before Active Trim will function. This safety feature is meant
to prevent the engine or drive from automatically trimming down and hitting something.
Selecting the Correct Profile
With so many available trim profiles, it can be difficult to determine which profile is the correct one. In making this
determination, it is important to understand what trim is, how it affects boat operation, and how boat loading can influence the
required trim angle. Armed with a clear understanding of these concepts, selecting the correct trim profile becomes simple.
What Trim Is
The trim angle of an outboard or sterndrive is the angle between the boat bottom and the propeller shaft formed by moving the
engine or sterndrive closer to the boat transom. This movement is called trimming in or down. Moving the engine or sterndrive
further away from the transom is called trimming out or up. When a boat is cruising on plane and the trim is adjusted so that the
propeller shaft is parallel to the surface of the water, that is said to be running at zero trim.
The term "trim" is generally used when referring to adjusting the outboard or sterndrive within the first 20° range of travel. This
is the range used while operating your boat on plane. The term "tilt" is generally used when referring to adjusting the outboard
or sterndrive further up or out of the water.
How Trim Affects Boat Operation
The trim angle of the outboard or sterndrive has a distinct effect on the planing angle of the boat, which in turn significantly
alters the top speed and handling. The engine or drive should be trimmed in for best start‑up acceleration and shortest time to
plane. The engine or drive would then be trimmed out for peak performance. Active Trim automatically handles this transition
for you.
61921
Engine or drive properly trimmed
If the engine or drive is trimmed in too far, the bow drops and the boat runs too wet. In this condition, top speed drops, fuel
economy decreases, the boat may oversteer in one direction or the other (bow steering), and steering torque will increase (to
the right with a right‑hand rotation propeller). Occasionally, extreme trim down can cause a boat to list to the left (with a
right‑hand propeller).
61922
Engine or drive trimmed in (bow too low)
If the engine or drive is trimmed out too far, the propeller may lose its hold on the water, fast V‑bottom boats may start to walk
from side to side (chine walking), steering torque will increase in the opposite direction to that when trimmed in, and getting on
plane may be difficult or labored. Porpoising of the boat may also occur.
61923
Engine or drive trimmed out (bow too high); porpoising
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DTS System Configuration
Boat Loading and Trim
Under normal loading and operating conditions while on plane, the boat bottom is roughly parallel to the surface of the water.
Changing the loading of the boat will not change the trim angle as previously defined, but it will change the running attitude of
the boat with respect to the surface of the water. Adding weight toward the stern of the boat will cause the bow to rise. Similarly,
adding weight toward the bow of the boat will cause the bow to lower.
Changing the trim angle can compensate for a change in the running attitude of the boat. Increasing the trim angle will raise the
bow of the boat, compensating for bow heavy loading. Decreasing the trim angle will lower the bow of the boat, compensating
for stern heavy loading.
Choosing an Active Trim Profile
If Active Trim is configured properly, the normal setting for running on plane will be profile 2, 3, or 4. This allows the operator
the flexibility to change the trim angle to compensate for variations in boat loading or other operating conditions. Selecting a
higher number profile will raise the bow and selecting a lower number profile will lower the bow.
Use the preceding descriptions of trim in and trim out to help determine whether or not your boat is trimmed properly (refer to
How Trim Affects Boat Operation). In general, this means you can increase the trim profile until the bow begins to porpoise
(rise and fall), and then back off one level.
Active Trim Red Status Light
ACTIVE A flashing red light can indicate different things, depending on if it is a single or a double flash sequence.
TRIM
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Single Flashing Red
ON ON ON ON ON ON
a OFF OFF OFF OFF OFF OFF a - Light (on or off)
b - Interval
b 61841
Fault Condition Description Notes
GPS signal intermittent GPS signal has achieved fix, but is dropping out Indicates loss of GPS signal.
intermittently.
Indicates obstructed GPS antenna or
GPS signal unavailable GPS has not achieved fix since key on. weak signal.
Double Flashing Red
ON ON ON ON ON ON
a OFF OFF OFF OFF OFF OFF a - Light (on or off)
b - Interval
b
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Fault Condition Description Notes
Indicates a problem with hydraulic pump
Trim up or trim down not The engine did not achieve its trim setpoint operation, fuse, connection, trim sensor, or
achieved while attempting to trim up or down. trim down circuit.
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