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
T8-C2-4 Digital 1
T8-C2-8 Digital 2
RLY1-R-OUT Relay contact output (switched +12 V to load)
RLY2-R-OUT Relay contact output (switched +12 V to load)
OEM-5
Stock ECU being replaced
F2Front VTEC pressure switch
F4Rear VTEC pressure switch
F5Front VTEC solenoid valve
F7Rear VTEC solenoid valve
T8-C1-9 Injector 1
T8-C1-25 Injector 4
T8-C1-17 Injector 2
T8-C1-16 Injector 5
T8-C1-34 Injector 3
T8-C1-15 Injector 6
T8-C3-22 PWM 4
T8-C1-5 PWM 1
T8-C1-24 Injector 7
T8-C3-9 Lambda 1 Heater Negative
T8-C3-25 PWM 7
T8-C3-3 Lambda 2 Heater Negative
T8-C3-10 PWM 8
T8-C3-4 PWM 9
T8-C1-4 PWM 2
T8-C1-3 PWM 3
T8-C3-28 PWM 10
T8-C1-10 Coil 1
T8-C1-18 Coil 2
GND
GND
ECU power (IGP1)
0V sensor
OEM-A
Stock ECU being replaced
1Injector 1
2Injector 4
3Injector 2
4Injector 5
5Injector 3
6Injector 6
7Main relay
8Fuel pump relay 2 (FLR2)
9Idle air control valve (IACV)
10Front O2 sensor heater (HTCNTF)
11EGR control solenoid
12Rear O2 sensor heater (HTCNTR)
13Check engine light (WARN)
14Chamber volume control solenoid (BPS)
15A/C clutch relay (ACC)
18Radiator fan control (FANCNTR)
20EVAP purge cut-off solenoid (PGS)
21Ignition coil 1
22Ignition coil 2
23Power ground (PG1)
24Power ground (PG2)
25ECU power (IGP1)
26Sensor ground (LG1)
GND
T8-C1-27 Coil 6
T8-C1-11 Coil 5
T8-C1-26 Coil 4
T8-C2-11 Digital 3
T8-C1-1 Coil 3
T8-C2-29 Cam 2
0V sensor
T8-C2-22 Cam 1
0V sensor
T8-C2-2 Wheel 1
0V sensor
T8-C2-12 Crank
0V sensor
OEM-B
Stock ECU being replaced
2Chassis ground (LG2)
3Ignition coil 6
4Ignition coil 5
6Ignition coil 4
7Neutral switch (M/T) / gear position (A/T)
8Ignition coil 3
9CYL 2P — CYP sensor 2 signal
10CYL 2M — CYP sensor 2 return
11CYL 1P — CYP sensor 1 signal
12CYL 1M — CYP sensor 1 return
13CRNK 2P — TDC sensor signal
14CRNK 2M — TDC sensor return
15CRNK 1P — crank sensor signal
16CRNK 1M — crank sensor return
ECU power (IGP2)
T8-C2-20 Wheel 2
T8-C2-15 Digital 5
T8-C2-27 Digital 6
T8-C2-32 Wheel 4
T8-C2-19 Analogue 6
T8-C2-14 Digital 4
OEM-C
Stock ECU being replaced
1ECU power (IGP2)
2Vehicle speed sensor (VSS)
3A/C switch (ACS)
5A/C pressure switch (PDSW)
7Clutch switch (M/T)
9Service check connector (SCS)
11Starter switch (STS)
Battery backup (VBU)
T8-C3-17 Analogue 7
T8-C2-31 Wheel 3
T8-C2-1 Analogue 2
T8-C2-18 Analogue 5
T8-C2-7 Thermistor 1
T8-C2-5 Analogue 3
T8-C2-25 Thermistor 2
T8-C2-6 Analogue 4
T8-C2-10 Analogue 1
5V ref
5V ref
5V ref
0V sensor
0V sensor
OEM-D
Stock ECU being replaced
1Battery backup (VBU)
8Ignition timing adjuster (IGADJ)
9Alternator FR signal
11Throttle position sensor (TPS)
12EGR lift sensor (EGRL)
13Engine coolant temperature (ECT)
14Primary O2 sensor
15Intake air temperature (IAT)
16Secondary O2 sensor
17MAP sensor
18+5V sensor supply (VCC)
19+5V sensor supply (VCC)
20+5V sensor supply (VCC)
21Sensor ground (SG)
22Sensor ground (SG)
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 · 5 pins
OEM-5-F5 Front VTEC solenoid valve
Relay coil positive (switched +12 V)
T8-C3-23 PWM 5
RLY2
RLY2-R
RLY2
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 · 5 pins
OEM-5-F7 Rear VTEC solenoid valve
Relay coil positive (switched +12 V)
T8-C3-24 PWM 6
T8
T8-C1
T8
1Coil 3
3PWM 3
4PWM 2
5PWM 1
9Injector 1
10Coil 1
11Coil 5
13Power Ground 1
14Power Ground 2
15Injector 6
16Injector 5
17Injector 2
18Coil 2
24Injector 7
25Injector 4
26Coil 4
27Coil 6
31Ignition 12v In
34Injector 3
OEM-B-8 Ignition coil 3
OEM-A-18 Radiator fan control (FANCNTR)
OEM-A-15 A/C clutch relay (ACC)
OEM-A-8 Fuel pump relay 2 (FLR2)
OEM-A-1 Injector 1
OEM-A-21 Ignition coil 1
OEM-B-4 Ignition coil 5
GND
GND
OEM-A-6 Injector 6
OEM-A-4 Injector 5
OEM-A-3 Injector 2
OEM-A-22 Ignition coil 2
OEM-A-9 Idle air control valve (IACV)
OEM-A-2 Injector 4
OEM-B-6 Ignition coil 4
OEM-B-3 Ignition coil 6
Ignition 12v In
OEM-A-5 Injector 3
T8-C2
T8
1Analogue 2
2Wheel 1
4Digital 1
5Analogue 3
6Analogue 4
7Thermistor 1
8Digital 2
10Analogue 1
11Digital 3
12Crank
14Digital 4
15Digital 5
18Analogue 5
19Analogue 6
20Wheel 2
21Sensor Ground
22Cam 1
245v Output
25Thermistor 2
27Digital 6
29Cam 2
31Wheel 3
32Wheel 4
33Sensor Ground
OEM-D-11 Throttle position sensor (TPS)
OEM-B-13 CRNK 2P — TDC sensor signal
OEM-5-F2 Front VTEC pressure switch
OEM-D-14 Primary O2 sensor
OEM-D-16 Secondary O2 sensor
OEM-D-13 Engine coolant temperature (ECT)
OEM-5-F4 Rear VTEC pressure switch
OEM-D-17 MAP sensor
OEM-B-7 Neutral switch (M/T) / gear position (A/T)
OEM-B-15 CRNK 1P — crank sensor signal
OEM-C-11 Starter switch (STS)
OEM-C-3 A/C switch (ACS)
OEM-D-12 EGR lift sensor (EGRL)
OEM-C-9 Service check connector (SCS)
OEM-C-2 Vehicle speed sensor (VSS)
0V sensor
OEM-B-11 CYL 1P — CYP sensor 1 signal
5V ref
OEM-D-15 Intake air temperature (IAT)
OEM-C-5 A/C pressure switch (PDSW)
OEM-B-9 CYL 2P — CYP sensor 2 signal
OEM-D-9 Alternator FR signal
OEM-C-7 Clutch switch (M/T)
0V sensor
T8-C3
T8
3Lambda 2 Heater Negative
4PWM 9
9Lambda 1 Heater Negative
10PWM 8
17Analogue 7
22PWM 4
23PWM 5
24PWM 6
25PWM 7
26Permanent 12v
28PWM 10
OEM-A-12 Rear O2 sensor heater (HTCNTR)
OEM-A-14 Chamber volume control solenoid (BPS)
OEM-A-10 Front O2 sensor heater (HTCNTF)
OEM-A-13 Check engine light (WARN)
OEM-D-8 Ignition timing adjuster (IGADJ)
OEM-A-7 Main relay
RLY1-R-COIL- Relay coil negative (ECU low-side driver)
RLY2-R-COIL- Relay coil negative (ECU low-side driver)
OEM-A-11 EGR control solenoid
Permanent 12v
OEM-A-20 EVAP purge cut-off solenoid (PGS)
SP-14V · 8 pins
SP-GND · 6 pins
SP-0V · 10 pins
SP-5V1 · 5 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.