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
T2I-C1-12 Wheel 1
T2I-C1-19 Crank
GND
GND
11–12 no data
T2I-C1-6 Coil 2
T2I-C1-3 Coil 1
17 no data
T2I-C1-11 Digital 1
19 no data
5V ref
5V ref
22 no data
0V sensor
0V sensor
T2I-C1-22 Analogue 2
T2I-C1-23 Analogue 3
27 no data
29 no data
T2I-C1-20 Analogue 1
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
11–12 no data
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
RLY1-R-OUT Relay contact output (switched +12 V to load)
7 no data
T2I-C1-24 Thermistor 1
9 no data
T2I-C1-30 Digital 2
12 no data
14 no data
16 no data
22–24 no data
OEM-B
Stock ECU being replaced
1 no data
6VTEC solenoid
7 no data
8Coolant temp sensor
9 no data
11VTEC oil pressure switch
12 no data
14 no data
16 no data
22–24 no data
2–3 no data
5–6 no data
10–14 no data
T2I-C1-26 PWM 4
16–17 no data
OEM-D
Stock ECU being replaced
2–3 no data
5–6 no data
10–14 no data
15Throttle actuator relay
16–17 no data
T2I-C1-32 Thermistor 2
2 no data
GND
0V sensor
5V ref
6 no data
T2I-C1-10 PWM 2
10 no data
T2I-C1-16 CAN High
T2I-C1-15 Lambda Heater Negative
T2I-C1-1 PWM 1
T2I-C1-34 Analogue 6
23 no data
T2I-C1-17 CAN Low
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
10 no data
11CAN H
12Radiator fan control
17Fuel pump relay
20Secondary O2 sensor
23 no data
24CAN L
31 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-6 VTEC solenoid
Relay coil positive (switched +12 V)
T2I-C1-18 PWM 3
T2I
T2I-C1
T2I
1PWM 1
3Coil 1
6Coil 2
10PWM 2
11Digital 1
12Wheel 1
13Power Ground 1
14Power Ground 2
15Lambda Heater Negative
16CAN High
17CAN Low
18PWM 3
19Crank
20Analogue 1
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-E-17 Fuel pump relay
OEM-A-16 Ignition coil 1
OEM-A-15 Ignition coil 2
OEM-E-7 Main relay control
OEM-A-18 Vehicle speed sensor
OEM-A-6 Cam position sensor (T2)
GND
GND
OEM-E-12 Radiator fan control
OEM-E-11 CAN H
OEM-E-24 CAN L
RLY1-R-COIL- Relay coil negative (ECU low-side driver)
OEM-A-7 Crank position sensor (T1)
OEM-A-30 MAP sensor
OEM-A-25 Accelerator pedal position B
OEM-A-26 Accelerator pedal position A
OEM-B-8 Coolant temp sensor
TB-J-TPS1 Throttle position 1
OEM-D-15 Throttle actuator relay
5V ref
0V sensor
0V sensor
OEM-B-11 VTEC oil pressure switch
Ignition 12v In
OEM-E-1 Coolant temp sensor 2
TB-J-TPS2 Throttle position 2
OEM-E-20 Secondary O2 sensor
TB
TB-J
TB
GNDThrottle sensor ground
TPS1Throttle position 1
TPS2Throttle position 2
VCCThrottle sensor 5V supply
0V sensor
T2I-C1-25 Analogue 4
T2I-C1-33 Analogue 5
Throttle sensor 5V supply
SP-14V · 6 pins
SP-GND · 8 pins
SP-5V1 · 6 pins
SP-0V · 7 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.