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
T4-C2-22 Cam 1
T4-C2-12 Crank
GND
GND
T4-C3-10 PWM 8
11–12 no data
T4-C1-26 Coil 4
T4-C1-1 Coil 3
T4-C1-18 Coil 2
T4-C1-10 Coil 1
17 no data
T4-C2-2 Wheel 1
19 no data
5V ref
5V ref
22 no data
0V sensor
0V sensor
T4-C2-1 Analogue 2
T4-C2-5 Analogue 3
27 no data
29 no data
T4-C2-10 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
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
T4-C1-25 Injector 4
T4-C1-34 Injector 3
T4-C1-17 Injector 2
T4-C1-9 Injector 1
RLY1-R-OUT Relay contact output (switched +12 V to load)
7 no data
T4-C2-7 Thermistor 1
9 no data
T4-C2-4 Digital 1
12 no data
T4-C3-18 Analogue 8
14 no data
16 no data
T4-C2-17 Thermistor 3
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
13Alternator FR signal
14 no data
16 no data
17Intake air temp sensor
22–24 no data
T4-C2-14 Digital 4
2–3 no data
T4-C2-15 Digital 5
5–6 no data
10–14 no data
T4-C3-22 PWM 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
10–14 no data
15Throttle actuator relay
16–17 no data
T4-C2-25 Thermistor 2
2 no data
GND
0V sensor
5V ref
6 no data
T4-C1-4 PWM 2
T4-C3-25 PWM 7
10 no data
T4-C2-26 CAN High
T4-C3-23 PWM 5
T4-C2-34 Analogue 9
T4-C2-3 Analogue 10
T4-C2-16 Analogue 11
T4-C1-5 PWM 1
T4-C3-24 PWM 6
T4-C3-17 Analogue 7
T4-C3-9 Lambda 1 Heater Negative
23 no data
T4-C2-28 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
8A/F sensor heater relay
10 no data
11CAN H
12Radiator fan control
14Fuel tank pressure sensor
15Electrical load detector
16Power steering load detector
17Fuel pump relay
18A/C clutch relay
20Secondary O2 sensor
21Secondary O2 heater
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)
T4-C1-3 PWM 3
T4
T4-C1
T4
1Coil 3
3PWM 3
4PWM 2
5PWM 1
6Motor 1 +
7Motor 1 -
9Injector 1
10Coil 1
13Power Ground 1
14Power Ground 2
17Injector 2
18Coil 2
25Injector 4
26Coil 4
31Ignition 12v In
34Injector 3
OEM-A-14 Ignition coil 3
RLY1-R-COIL- Relay coil negative (ECU low-side driver)
OEM-E-7 Main relay control
OEM-E-17 Fuel pump relay
TB-J-M+ Throttle motor +
TB-J-M- Throttle motor −
OEM-B-5 Injector 1
OEM-A-16 Ignition coil 1
GND
GND
OEM-B-4 Injector 2
OEM-A-15 Ignition coil 2
OEM-B-2 Injector 4
OEM-A-13 Ignition coil 4
Ignition 12v In
OEM-B-3 Injector 3
T4-C2
T4
1Analogue 2
2Wheel 1
3Analogue 10
4Digital 1
5Analogue 3
6Analogue 4
7Thermistor 1
95v Output
10Analogue 1
12Crank
14Digital 4
15Digital 5
16Analogue 11
17Thermistor 3
19Analogue 6
21Sensor Ground
22Cam 1
245v Output
25Thermistor 2
26CAN High
28CAN Low
33Sensor Ground
34Analogue 9
OEM-A-25 Accelerator pedal position B
OEM-A-18 Vehicle speed sensor
OEM-E-15 Electrical load detector
OEM-B-11 VTEC oil pressure switch
OEM-A-26 Accelerator pedal position A
TB-J-TPS1 Throttle position 1
OEM-B-8 Coolant temp sensor
5V ref
OEM-A-30 MAP sensor
OEM-A-7 Crank position sensor (T1)
OEM-D-1 Cruise set switch
OEM-D-4 Cruise main switch
OEM-E-16 Power steering load detector
OEM-B-17 Intake air temp sensor
TB-J-TPS2 Throttle position 2
0V sensor
OEM-A-6 Cam position sensor (T2)
5V ref
OEM-E-1 Coolant temp sensor 2
OEM-E-11 CAN H
OEM-E-24 CAN L
0V sensor
OEM-E-14 Fuel tank pressure sensor
T4-C3
T4
9Lambda 1 Heater Negative
10PWM 8
17Analogue 7
18Analogue 8
22PWM 4
23PWM 5
24PWM 6
25PWM 7
OEM-E-21 Secondary O2 heater
OEM-A-10 A/F sensor heater
OEM-E-20 Secondary O2 sensor
OEM-B-13 Alternator FR signal
OEM-D-15 Throttle actuator relay
OEM-E-12 Radiator fan control
OEM-E-18 A/C clutch relay
OEM-E-8 A/F sensor heater relay
TB
TB-J
TB
M+Throttle motor +
M-Throttle motor −
GNDThrottle sensor ground
TPS1Throttle position 1
TPS2Throttle position 2
VCCThrottle sensor 5V supply
T4-C1-6 Motor 1 +
T4-C1-7 Motor 1 -
0V sensor
T4-C2-6 Analogue 4
T4-C2-19 Analogue 6
Throttle sensor 5V supply
SP-14V · 6 pins
SP-GND · 8 pins
SP-5V1 · 5 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.
64 / 64 connections
Columns ▾
Lengths need a layout. Add bundles in Layout.
Not set yet: signal, colour, stripe, ident.
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