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
5 no data
7–8 no data
T2-C1-11 Digital 1
11 no data
14 no data
T2-C1-1 PWM 1
T2-C1-18 PWM 3
T2-C1-26 PWM 4
T2-C1-15 Lambda Heater Negative
22 no data
T2-C1-23 Analogue 3
T2-C1-34 Analogue 6
31 no data
OEM-A
Stock ECU being replaced
5 no data
7–8 no data
9Vehicle speed sensor
11 no data
14 no data
15Fuel pump relay (USDM)
16Fuel pump relay (JDM)
17A/C clutch relay
20Radiator fan relay
22 no data
23Secondary O2 sensor
29Fuel tank pressure sensor
31 no data
Power source 1 (main relay)
GND
T2-C1-9 Injector 2
T2-C1-8 Injector 1
T2-C1-9 Injector 2
6–8 no data
Power source 2 (main relay)
GND
T2-C1-8 Injector 1
RLY1-R-OUT Relay contact output (switched +12 V to load)
13–19 no data
GND
Backup power (battery constant)
GND
24–25 no data
OEM-B
Stock ECU being replaced
1Power source 1 (main relay)
2Power ground 1
3Injector 2
4Injector 3
5Injector 4
6–8 no data
9Power source 2 (main relay)
10Power ground 2
11Injector 1
12VTEC solenoid
13–19 no data
20Ground
21Backup power (battery constant)
22Ground
24–25 no data
T2-C1-3 Coil 1
T2-C1-30 Digital 2
6 no data
0V sensor
T2-C1-19 Crank
SP-0V · 2 pins
T2-C1-6 Coil 2
T2-C1-25 Analogue 4
T2-C1-33 Analogue 5
T2-C1-20 Analogue 1
0V sensor
5V ref
T2-C1-12 Wheel 1
SP-0V · 2 pins
23 no data
T2-C1-32 Thermistor 2
T2-C1-24 Thermistor 1
T2-C1-22 Analogue 2
5V ref
0V sensor
0V sensor
OEM-C
Stock ECU being replaced
4Ignition coil 1
5Alternator FR signal
6 no data
7Sensor ground 1
8Crank sensor + (CKP+)
9Crank sensor − (CKP−)
12Ignition coil 2
15Secondary O2 sensor
16Primary O2 sensor
17MAP sensor
18Sensor ground 2
19Sensor 5V supply 1 (MAP)
20Cam (TDC1) sensor +
21Cam (TDC1) sensor −
23 no data
25Intake air temp sensor
26Coolant temp sensor
27Throttle position sensor
28Sensor 5V supply 2
30Cam (TDC2) sensor −
31Timing ground
1–16 no data
OEM-D
Stock ECU being replaced
1–16 no data
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-12 VTEC solenoid
Relay coil positive (switched +12 V)
T2-C1-10 PWM 2
T2
T2-C1
T2
1PWM 1
3Coil 1
6Coil 2
8Injector 1
9Injector 2
10PWM 2
11Digital 1
12Wheel 1
13Power Ground 1
14Power Ground 2
15Lambda Heater Negative
18PWM 3
19Crank
20Analogue 1
21Permanent 12v
22Analogue 2
23Analogue 3
24Thermistor 1
25Analogue 4
26PWM 4
275v Output
28Sensor Ground
29Sensor Ground
30Digital 2
31Ignition 12v In
32Thermistor 2
33Analogue 5
34Analogue 6
OEM-A-15 Fuel pump relay (USDM)
OEM-C-4 Ignition coil 1
OEM-C-12 Ignition coil 2
Injector 1 · 2 pins
Injector 4 · 2 pins
RLY1-R-COIL- Relay coil negative (ECU low-side driver)
OEM-A-9 Vehicle speed sensor
OEM-C-20 Cam (TDC1) sensor +
GND
GND
OEM-A-20 Radiator fan relay
OEM-A-16 Fuel pump relay (JDM)
OEM-C-8 Crank sensor + (CKP+)
OEM-C-17 MAP sensor
Permanent 12v
OEM-C-27 Throttle position sensor
OEM-A-23 Secondary O2 sensor
OEM-C-26 Coolant temp sensor
OEM-C-15 Secondary O2 sensor
OEM-A-17 A/C clutch relay
5V ref
0V sensor
0V sensor
OEM-C-5 Alternator FR signal
Ignition 12v In
OEM-C-25 Intake air temp sensor
OEM-C-16 Primary O2 sensor
OEM-A-29 Fuel tank pressure sensor
SP-14V · 6 pins
SP-GND · 7 pins
SP-0V · 9 pins
SP-5V1 · 4 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.