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
MS3PROEVOHC-C-2 PWM out 4
MS3PROEVOHC-C-1 PWM out 5
MS3PROEVOHC-A-2 High current out 2
MS3PROEVOHC-A-28 Fuel pump relay out
MS3PROEVOHC-A-5 High current out 3
MS3PROEVOHC-B-11 Injector out G
GND
MS3PROEVOHC-B-12 Injector out H
MS3PROEVOHC-B-2 Injector out B
MS3PROEVOHC-A-3 Injector out J
MS3PROEVOHC-B-32 Stepper IAC out 2A
MS3PROEVOHC-A-4 Injector out I
MS3PROEVOHC-B-33 Stepper IAC out 2B
0V sensor
MS3PROEVOHC-B-1 Injector out A
MS3PROEVOHC-B-30 Stepper IAC out 1B
0V sensor
MS3PROEVOHC-B-10 Injector out F
MS3PROEVOHC-B-31 Stepper IAC out 1A
GND
GND
OEM-A
Stock ECU being replaced
1CIdle speed control (ISC) solenoid
1ETurbo charge control solenoid
1GPurge solenoid
1HCooling fan relay (low speed)
1ITurbo charge relief solenoid
1KTurbo pre-control solenoid
1LPower ground
1MTurbo control solenoid
1OBoost control solenoid
1QInjector 1 (front primary)
1SOMP stepper phase B2
1UInjector 2 (rear primary)
1WOMP stepper phase A2
1XSensor ground
1YInjector 3 (front secondary)
1AAOMP stepper phase B1
1ABSensor ground
1ACInjector 4 (rear secondary)
1AEOMP stepper phase A1
1AFPower ground
1AJPower ground
OEM-B
Stock ECU being replaced
5V ref
MS3PROEVOHC-A-25 O2 in
MS3PROEVOHC-B-4 Injector out C
MS3PROEVOHC-A-21 Analog in 3
MS3PROEVOHC-A-9 TPS in
MS3PROEVOHC-A-31 Knock in 1
MS3PROEVOHC-A-6 CKP+
0V sensor
MS3PROEVOHC-A-11 CLT in
MS3PROEVOHC-A-26 CMP+
MS3PROEVOHC-A-20 Analog in 2
MS3PROEVOHC-A-10 MAT in
0V sensor
OEM-C
Stock ECU being replaced
3A+5V sensor supply
3DO2 sensor (narrowband)
3GFuel pressure regulator control (PRC) solenoid
3HOMP position sensor
3IThrottle position (TPS, full range)
3OKnock sensor
3RCrank position (CAS NE)
3SSensor ground (CAS)
3TIntake air temperature (IAT)
3UHome position (CAS G)
3VFuel temperature
3WCoolant temperature (ECT)
3ABSensor ground
ECU main power (+12V via main relay/ECR)
MS3PROEVOHC-B-19 Digital switched 12V in
MS3PROEVOHC-A-14 PWM / Idle Out 1
ECU main power (+12V via main relay/ECR)
MS3PROEVOHC-C-4 Digital out 1
MS3PROEVOHC-A-29 PWM out 2
MS3PROEVOHC-C-3 Digital out 2
MS3PROEVOHC-A-30 PWM out 3
MS3PROEVOHC-A-1 High current out 1
MS3PROEVOHC-A-24 Tach out
MS3PROEVOHC-B-28 Digital frequency in 1 (unconditioned)
MS3PROEVOHC-B-20 Digital switched in 2
MS3PROEVOHC-B-29 Digital switched in 3
MS3PROEVOHC-C-11 Digital switched in 4
MS3PROEVOHC-A-32 Digital switched in 1
MS3PROEVOHC-B-13 Spark out G
MS3PROEVOHC-A-19 Analog in 1
MS3PROEVOHC-B-14 Spark out E
MS3PROEVOHC-B-15 Spark out C
OEM-D
Stock ECU being replaced
4AECU main power (+12V via main relay/ECR)
4CIgnition switch / start signal
4DAir pump clutch relay
4EECU main power (+12V via main relay/ECR)
4FFuel pump speed relay
4GFuel pump relay
4IA/C relay
4KCooling fan relay (low speed)
4LCooling fan relay (high speed)
4MTachometer output
4QVehicle speed sensor
4SClutch switch
4VA/C request
4WPower steering pressure switch
4AABrake pedal switch
4AFIgnition front trailing
4AHMAP sensor (PIM)
4AJIgnition rear trailing
4ANIgnition leading (wasted spark)
MS3PROEVOHC
MS3PROEVOHC-A
MS3PROEVOHC
1High current out 1
2High current out 2
3Injector out J
4Injector out I
5High current out 3
6CKP+
85V+ VREF out
9TPS in
10MAT in
11CLT in
13Logic Ground
14PWM / Idle Out 1
15CKP−
18Sensor return
19Analog in 1
20Analog in 2
21Analog in 3
24Tach out
25O2 in
26CMP+
27CMP−
28Fuel pump relay out
29PWM out 2
30PWM out 3
31Knock in 1
32Digital switched in 1
3512V+ switched power in
OEM-D-4L Cooling fan relay (high speed)
OEM-A-1G Purge solenoid
OEM-A-1Q Injector 1 (front primary)
OEM-A-1U Injector 2 (rear primary)
OEM-A-1I Turbo charge relief solenoid
OEM-C-3R Crank position (CAS NE)
5V ref
OEM-C-3I Throttle position (TPS, full range)
OEM-C-3W Coolant temperature (ECT)
OEM-C-3T Intake air temperature (IAT)
0V sensor
OEM-D-4D Air pump clutch relay
SP-0V · 4 pins
0V sensor
OEM-D-4AH MAP sensor (PIM)
OEM-C-3V Fuel temperature
OEM-C-3H OMP position sensor
OEM-D-4M Tachometer output
OEM-C-3D O2 sensor (narrowband)
OEM-C-3U Home position (CAS G)
SP-0V · 4 pins
OEM-A-1H Cooling fan relay (low speed)
OEM-D-4G Fuel pump relay
OEM-D-4K Cooling fan relay (low speed)
OEM-C-3O Knock sensor
OEM-D-4AA Brake pedal switch
12V+ switched power in
MS3PROEVOHC-B
MS3PROEVOHC
1Injector out A
2Injector out B
3Ground
4Injector out C
5Ground
7Ground
9Ground
10Injector out F
11Injector out G
12Injector out H
13Spark out G
14Spark out E
15Spark out C
19Digital switched 12V in
20Digital switched in 2
28Digital frequency in 1 (unconditioned)
29Digital switched in 3
30Stepper IAC out 1B
31Stepper IAC out 1A
32Stepper IAC out 2A
33Stepper IAC out 2B
OEM-A-1Y Injector 3 (front secondary)
OEM-A-1O Boost control solenoid
GND
OEM-C-3G Fuel pressure regulator control (PRC) solenoid
GND
GND
GND
OEM-A-1AC Injector 4 (rear secondary)
OEM-A-1K Turbo pre-control solenoid
OEM-A-1M Turbo control solenoid
OEM-D-4AF Ignition front trailing
OEM-D-4AJ Ignition rear trailing
OEM-D-4AN Ignition leading (wasted spark)
OEM-D-4C Ignition switch / start signal
OEM-D-4S Clutch switch
OEM-D-4Q Vehicle speed sensor
OEM-D-4V A/C request
OEM-A-1AA OMP stepper phase B1
OEM-A-1AE OMP stepper phase A1
OEM-A-1S OMP stepper phase B2
OEM-A-1W OMP stepper phase A2
MS3PROEVOHC-C
MS3PROEVOHC
1PWM out 5
2PWM out 4
3Digital out 2
4Digital out 1
11Digital switched in 4
17Sensor return
18Sensor return
19Sensor return
20Sensor return
21Sensor return
OEM-A-1E Turbo charge control solenoid
OEM-A-1C Idle speed control (ISC) solenoid
OEM-D-4I A/C relay
OEM-D-4F Fuel pump speed relay
OEM-D-4W Power steering pressure switch
0V sensor
0V sensor
0V sensor
0V sensor
0V sensor
SP-GND · 8 pins
SP-0V · 14 pins
SP-14V · 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.
67 / 67 connections
Columns ▾
Lengths need a layout. Add bundles in Layout.
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