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
5V ref
T4-C2-14 Digital 4
T4-C2-12 Crank
0V sensor
T4-C2-1 Analogue 2
T4-C2-10 Analogue 1
T4-C2-15 Digital 5
T4-C2-22 Cam 1
0V sensor
T4-C2-5 Analogue 3
T4-C2-6 Analogue 4
T4-C2-25 Thermistor 2
T4-C2-2 Wheel 1
0V sensor
T4-C2-7 Thermistor 1
0V sensor
OEM-C84
Stock ECU being replaced
1Sensor supply +5V (VCC)
4No.2 speed sensor (SP2-)
5Crank position (NE)
6Crank sensor return (NE-)
7Throttle position (VTA1)
8Manifold pressure (PIM)
9No.2 speed sensor (SP2+)
10Cam position 1 (G1)
11Cam 1 return (G1-)
12TRAC throttle position (VTA2)
13O2 sensor (OX1)
14Intake air temperature (THA)
16Cam position 2 (G2)
17Cam 2 return (G2-)
20Coolant temperature (THW)
22Sensor ground (E2)
T4-C1-5 PWM 1
T4-C1-25 Injector 4
T4-C2-19 Analogue 6
T4-C2-16 Analogue 11
GND
OEM-C85
Stock ECU being replaced
2EFI main relay control (M-REL)
3Check-engine lamp (W)
5Diagnostic test 1 (TE1)
14ABS active (MT only)
16Power ground (E1)
T4-C1-4 PWM 2
T4-C2-3 Analogue 10
T4-C3-17 Analogue 7
T4-C3-18 Analogue 8
T4-C2-34 Analogue 9
T4-C2-4 Digital 1
T4-C2-17 Thermistor 3
Battery constant (BATT)
EFI main relay power (+B)
EFI main relay power (+B1)
OEM-C86
Stock ECU being replaced
5A/C clutch relay (ACMG)
6A/T overdrive disable 2 (OD2)
7A/T overdrive disable 1 (OD1)
10A/T 2nd-gear indicator (2)
11Diagnostic test 2 (TE2)
12No.1 speed sensor (SP1)
13Cat temperature sensor (CCO)
14Battery constant (BATT)
22EFI main relay power (+B)
23EFI main relay power (+B1)
T4-C3-9 Lambda 1 Heater Negative
T4-C1-34 Injector 3
T4-C1-17 Injector 2
T4-C1-9 Injector 1
T4-C1-3 PWM 3
T4-C1-1 Coil 3
T4-C1-18 Coil 2
T4-C3-23 PWM 5
T4-C3-10 PWM 8
T4-C3-25 PWM 7
T4-C3-24 PWM 6
T4-C3-22 PWM 4
T4-C1-10 Coil 1
T4-C1-26 Coil 4
GND
GND
GND
OEM-C88
Stock ECU being replaced
3O2 heater (HT)
8Injector 3 (#30, cyl 2&6)
9Injector 2 (#20, cyl 3&5)
10Injector 1 (#10, cyl 1&4)
11A/T shift solenoid 1 (S1)
15Ignition 3 (IGT3)
16Ignition 2 (IGT2)
17A/T shift solenoid 2 (S2)
20ISC stepper coil 4 (ISCV4)
21ISC stepper coil 3 (ISCV3)
22ISC stepper coil 2 (ISCV2)
23ISC stepper coil 1 (ISCV1)
24Ignition 1 (IGT1)
26Ignition 4 (IGT4)
28Power ground (E11)
33Power ground (E02)
34Power ground (E01)
T4
T4-C1
T4
1Coil 3
3PWM 3
4PWM 2
5PWM 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-C88-15 Ignition 3 (IGT3)
OEM-C88-11 A/T shift solenoid 1 (S1)
OEM-C86-5 A/C clutch relay (ACMG)
OEM-C85-2 EFI main relay control (M-REL)
OEM-C88-10 Injector 1 (#10, cyl 1&4)
OEM-C88-24 Ignition 1 (IGT1)
GND
GND
OEM-C88-9 Injector 2 (#20, cyl 3&5)
OEM-C88-16 Ignition 2 (IGT2)
OEM-C85-3 Check-engine lamp (W)
OEM-C88-26 Ignition 4 (IGT4)
Ignition 12v In
OEM-C88-8 Injector 3 (#30, cyl 2&6)
T4-C2
T4
1Analogue 2
2Wheel 1
3Analogue 10
4Digital 1
5Analogue 3
6Analogue 4
7Thermistor 1
10Analogue 1
12Crank
14Digital 4
15Digital 5
16Analogue 11
17Thermistor 3
19Analogue 6
21Sensor Ground
22Cam 1
245v Output
25Thermistor 2
33Sensor Ground
34Analogue 9
OEM-C84-7 Throttle position (VTA1)
OEM-C84-16 Cam position 2 (G2)
OEM-C86-6 A/T overdrive disable 2 (OD2)
OEM-C86-12 No.1 speed sensor (SP1)
OEM-C84-12 TRAC throttle position (VTA2)
OEM-C84-13 O2 sensor (OX1)
OEM-C84-20 Coolant temperature (THW)
OEM-C84-8 Manifold pressure (PIM)
OEM-C84-5 Crank position (NE)
OEM-C84-4 No.2 speed sensor (SP2-)
OEM-C84-9 No.2 speed sensor (SP2+)
OEM-C85-14 ABS active (MT only)
OEM-C86-13 Cat temperature sensor (CCO)
OEM-C85-5 Diagnostic test 1 (TE1)
0V sensor
OEM-C84-10 Cam position 1 (G1)
5V ref
OEM-C84-14 Intake air temperature (THA)
0V sensor
OEM-C86-11 Diagnostic test 2 (TE2)
T4-C3
T4
9Lambda 1 Heater Negative
10PWM 8
17Analogue 7
18Analogue 8
22PWM 4
23PWM 5
24PWM 6
25PWM 7
26Permanent 12v
OEM-C88-3 O2 heater (HT)
OEM-C88-20 ISC stepper coil 4 (ISCV4)
OEM-C86-7 A/T overdrive disable 1 (OD1)
OEM-C86-10 A/T 2nd-gear indicator (2)
OEM-C88-23 ISC stepper coil 1 (ISCV1)
OEM-C88-17 A/T shift solenoid 2 (S2)
OEM-C88-22 ISC stepper coil 2 (ISCV2)
OEM-C88-21 ISC stepper coil 3 (ISCV3)
Permanent 12v
SP-0V · 7 pins
SP-14V · 4 pins
SP-GND · 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.