Not confident with automotive wiring? Have a professional harness builder or tuner do it, or check your work before first power-up. A wiring mistake can damage the ECU, the engine or the car, or start a fire.
100%
Stock ECU being replaced
Ignition power 2
Ignition power 1
GND
GND
P8-C1-27 Cam Sensor
P8-C1-8 Crank Sensor
GND
GND
P8-C1-17 Injector 5
11–12 no data
P8-C1-2 Coil 4
P8-C1-20 Coil 3
P8-C1-38 Coil 2
P8-C1-1 Coil 1
17 no data
P8-C1-11 Undriven Wheel (must)
19 no data
5V ref
5V ref
22 no data
0V sensor
0V sensor
P8-C1-48 Throttle Wiper
P8-C1-25 Analogue Input 1
27 no data
29 no data
P8-C1-30 Map
OEM-A
Stock ECU being replaced
2Ignition power 2
3Ignition power 1
4Power ground 2
5Power ground 1
6Cam position sensor (T2)
7Crank position sensor (T1)
8Logic ground 2
9Logic ground 1
10A/F sensor heater
11–12 no data
13Ignition coil 4
14Ignition coil 3
15Ignition coil 2
16Ignition coil 1
17 no data
18Vehicle speed sensor
19 no data
20Sensor voltage 2
21Sensor voltage 1
22 no data
23Sensor ground 2
24Sensor ground 1
25Accelerator pedal position B
26Accelerator pedal position A
27 no data
29 no data
30MAP sensor
1 no data
P8-C1-36 Injector 4
P8-C1-54 Injector 3
P8-C1-18 Injector 2
P8-C1-37 Injector 1
RLY1-R-OUT Relay contact output (switched +12 V to load)
7 no data
P8-C1-26 Water Temp
9 no data
P8-C1-13 Map2/ALS/Ana1 On/Off
12 no data
14 no data
P8-C1-35 Injector 6
16 no data
P8-C1-53 Injector 7
P8-C1-16 Injector 8
22–24 no data
OEM-B
Stock ECU being replaced
1 no data
2Injector 4
3Injector 3
4Injector 2
5Injector 1
6VTEC solenoid
7 no data
8Coolant temp sensor
9 no data
11VTEC oil pressure switch
12 no data
14 no data
15Engine mount control solenoid
16 no data
18Alternator control
21Evap canister purge valve
22–24 no data
P8-C1-14 Traction Wet/Dry
2–3 no data
P8-C1-31 Launch Button
5–6 no data
P8-C1-32 Traction On/Off
P8-C1-33 Shift Cut
P8-C1-29 Left Driven Wheel
10–14 no data
P8-C1-42 Cam Phase Valve/Aux Out 4
16–17 no data
OEM-D
Stock ECU being replaced
1Cruise set switch
2–3 no data
4Cruise main switch
5–6 no data
7Cruise resume switch
8Brake pedal position switch
9Cruise clutch signal
10–14 no data
15Throttle actuator relay
16–17 no data
P8-C1-45 Air Temp
2 no data
GND
0V sensor
5V ref
6 no data
P8-C1-5 Aux Out 2
P8-C1-4 Idle Valve
10 no data
P8-C1-21 Turbo Pressure Valve
P8-C1-41 Fuel Pump Relay
P8-C1-23 Turbo ALS Valve
P8-C1-12 Lambda Signal
P8-C1-6 Shift Light
P8-C1-50 Undriven Wheel (optional)
23 no data
P8-C1-24 Tacho
P8-C1-9 Right Driven Wheel
31 no data
OEM-E
Stock ECU being replaced
1Coolant temp sensor 2
2 no data
3Logic ground 3
4Sensor ground 3
5Sensor voltage 3
6 no data
7Main relay control
8A/F sensor heater relay
10 no data
12Radiator fan control
17Fuel pump relay
18A/C clutch relay
20Secondary O2 sensor
21Secondary O2 heater
22Brake pedal switch
23 no data
25Engine speed pulse (tacho)
28A/C switch signal
31 no data
P8
P8-C1
P8
1Coil 1
2Coil 4
4Idle Valve
5Aux Out 2
6Shift Light
7Analogue Input 2 Or Log Switch
8Crank Sensor
9Right Driven Wheel
105 Volts
11Undriven Wheel (must)
12Lambda Signal
13Map2/ALS/Ana1 On/Off
14Traction Wet/Dry
15Power Ground
16Injector 8
17Injector 5
18Injector 2
1912 Volts
20Coil 3
21Turbo Pressure Valve
23Turbo ALS Valve
24Tacho
25Analogue Input 1
26Water Temp
27Cam Sensor
285 Volts
29Left Driven Wheel
30Map
31Launch Button
32Traction On/Off
33Shift Cut
34Power Ground
35Injector 6
36Injector 4
37Injector 1
38Coil 2
41Fuel Pump Relay
42Cam Phase Valve/Aux Out 4
43Aux Out 3
44Analogue Input 3
45Air Temp
46Signal Ground
47Signal Ground
48Throttle Wiper
49Lambda Earth
50Undriven Wheel (optional)
51Signal Ground
525 Volts
53Injector 7
54Injector 3
55Power Ground
OEM-A-16 Ignition coil 1
OEM-A-13 Ignition coil 4
OEM-E-8 A/F sensor heater relay
OEM-E-7 Main relay control
OEM-E-21 Secondary O2 heater
TB-J-TPS1 Throttle position 1
OEM-A-7 Crank position sensor (T1)
OEM-E-28 A/C switch signal
5V ref
OEM-A-18 Vehicle speed sensor
OEM-E-20 Secondary O2 sensor
OEM-B-11 VTEC oil pressure switch
OEM-D-1 Cruise set switch
GND
OEM-B-21 Evap canister purge valve
OEM-A-10 A/F sensor heater
OEM-B-4 Injector 2
12 Volts
OEM-A-14 Ignition coil 3
OEM-E-12 Radiator fan control
OEM-E-18 A/C clutch relay
OEM-E-25 Engine speed pulse (tacho)
OEM-A-26 Accelerator pedal position A
OEM-B-8 Coolant temp sensor
OEM-A-6 Cam position sensor (T2)
5V ref
OEM-D-9 Cruise clutch signal
OEM-A-30 MAP sensor
OEM-D-4 Cruise main switch
OEM-D-7 Cruise resume switch
OEM-D-8 Brake pedal position switch
GND
OEM-B-15 Engine mount control solenoid
OEM-B-2 Injector 4
OEM-B-5 Injector 1
OEM-A-15 Ignition coil 2
OEM-E-17 Fuel pump relay
OEM-D-15 Throttle actuator relay
RLY1-R-COIL- Relay coil negative (ECU low-side driver)
TB-J-TPS2 Throttle position 2
OEM-E-1 Coolant temp sensor 2
0V sensor
0V sensor
OEM-A-25 Accelerator pedal position B
0V sensor
OEM-E-22 Brake pedal switch
0V sensor
5V ref
OEM-B-18 Alternator control
OEM-B-3 Injector 3
GND
RLY1
RLY1-R
RLY1
INRelay contact input (switched +12 V)
OUTRelay contact output (switched +12 V to load)
COIL+Relay coil positive (switched +12 V)
COIL-Relay coil negative (ECU low-side driver)
SP-14V · 3 pins
OEM-B-6 VTEC solenoid
Relay coil positive (switched +12 V)
P8-C1-43 Aux Out 3
TB
TB-J
TB
GNDThrottle sensor ground
TPS1Throttle position 1
TPS2Throttle position 2
VCCThrottle sensor 5V supply
0V sensor
P8-C1-7 Analogue Input 2 Or Log Switch
P8-C1-44 Analogue Input 3
Throttle sensor 5V supply
SP-GND · 9 pins
SP-14V · 6 pins
SP-5V1 · 4 pins
SP-0V · 9 pins
Press enter or space to select a node. You can then use the arrow keys to move the node around. Press delete to remove it and escape to cancel.
Press enter or space to select an edge. You can then press delete to remove it or escape to cancel.