Circuit diagram
Indicates a connection between the symbols.
The circled numbers in the illustration indicate the engine ECM terminal numbers.
Pulser coil
TPS
Air pressure sensor
Water pressure sensor
Speed sensor
Ground
Air temperature sensor
Thermo sensor
Trim sensor
Water detection switch
Shift position switch
Engine shut~off switch
Oil pressure switch
Trolling switch (UP)
Trolling switch (DN)
Main relay
High-pressure fuel pump
Rectifier/Regulator
Engine start switch
Battery
Engine ECM
Fuel injector #1
Fuel injector #4
Fuel injector #2
Fuel injector #3
Vapor shut-off valve
Ignition coil #1, #4
Ignition coil #2, #3
ISO valve
YDIS
Oil pressure alert indicator
Overheat alert indicator
Alert buzzer
Tachometer
Multi-hub
ECM coupler layout
| No | Connecting part | Color |
|---|---|---|
| 1 | Ignition coil #2, #3 | Black/White |
| 2 | - | - |
| 3 | Fuel injector #1, #4 | Purple/Red |
| 4 | Fuel injector #2, #3 | Purple/Black |
| 5 | Ground | Black |
| 6 | ISC | Green/Black |
| 7 | Main relay, tachometer | Green |
| 8 | Overheat alert indicator | Pink/Black |
| 9 | Alert buzzer | Pink |
| 10 | Oil pressure switch | Pink/White |
| 11 | Vapor shut-off valve | Green/Black |
| 12 | - | - |
| 13 | YDIS | White/Black |
| 14 | Ground | Black |
| 15 | Main relay | Red/Yellow |
| 16 | Sensor power source | Orange |
| 17 | Air pressure sensor | Pink/Green |
| 18 | Ignition coil #1, #4 | Black/Red |
| 19 | - | - |
| 20 | ISC | Green/Yellow |
| 21 | ISC | Green |
| 22 | - | - |
| 23 | ISC | Green/Red |
| 24 | Main relay (high-pressure fuel pump | Blue |
| 25 | Diagnostic flash indicator | Blue/White |
| 26 | Oil pressure alert indicator | Pink/White |
| 27 | Engine shut-off switch | White |
| 28 | Trolling switch (UP) | Orange/White |
| 29 | Trolling switch (DN) | White/Blue |
| 30 | - | - |
| 31 | Sensor ground | Black |
| 32 | - | - |
| 33 | Water detection switch | Blue/White |
| 34 | Neutral switch | Blue/Green |
| 35 | - | - |
| 36 | TPS | Pink |
| 37 | Speed sensor | Blue |
| 38 | Air temperature sensor | Black/Yellow |
| 39 | - | - |
| 40 | Pulser coil | White/Red |
| 41 | - | - |
| 42 | - | - |
| 43 | Multi-hub | White |
| 44 | - | - |
| 45 | Trim sensor | Pink |
| 46 | Water pressure sensor | Blue/Black |
| 47 | - | - |
| 48 | Thermo sensor | Black/Yellow |
| 49 | - | - |
| 50 | - | - |
| 51 | - | - |
| 52 | Multi-hub | Blue |
