VR6 OBD1 ECU

VAG Wiring

Bosch Motronic M2.9.1 ECU OBD1 Pinout

PinFunctionColor, VR6 OBD1Color, ABA OBD1
1GroundBrownBrown/Red
2Cylinder InjectorGray/Yellow (Injector 6)White/Gray (Injector 2)
3Cylinder InjectorGray/Green (Injector 2)-
4Cylinder InjectorGray/Blue (Injector 4)-
5Check Engine LightYellow/BlackYellow/Black
6Fuel Pump Relay Turn-OnYellow/BlueYellow/Blue
7Ground (also Auto. Trans. Harness, for PNP Relay)Brown/RedBrown/Red
8Coil Pack Pin 2 (VR6 Coilpack), Coil Signal (ABA, VR6 Dist.)Black/Brown or Black Red (Dist.)Black/Red
9Engine Electronics Relay (3) Turn-OnBlack/BrownBlack/Brown
10Ground (OBD1 EGR enable), Throttle Valve Motor Switch (OBD2)Brown/White or WhiteBrown/White or White
11Automatic Transmission Control ModuleBlue/YellowBlue/Yellow
12Oxygen Sensor 1 Heater Ground--
13Oxygen Sensor 2 SignalBlack/Yellow (late 94+Corrado only)-
14Coolant Temperature SensorBlueBlue
15EGR Temperature SensorVioletViolet
16Mass Airflow Sensor GroundBrown/BlueBrown/Red
17Mass Airflow Sensor SignalRedRed
18Automatic Transmission Control ModuleYellow/RedYellow/Red
19Power for MAP and Acceleration Sensors (late 94+ Corrado)Yellow/Black-
20Oxygen Sensor 1 SignalWhiteWhite
21Data Link Connector (L-Line)YellowYellow
22Tachometer OutputGreen/BlackGreen/Black
23Power From Engine Electronics Relay (3) Output (OBD1), Fuse 15 Power (OBD2)Red/BlueRed/Blue
24Cylinder InjectorGray (Injector 1)White/Black (Injector 1)
25Cylinder InjectorGray/BlackĀ  (Injector 5)White/Green (Injector 3)
26Cylinder InjectorGray/Red (Injector 3)White/Blue (Injector 4)
27Idle Air Control Valve (OBD1), Throttle Valve Motor + (OBD2)Red/BlueWhite
28Heated Oxygen Sensor Relay Turn-On, Oxygen Sensor 1 Heater Ground (late 94+ Corrado)White (Brown- late 94+ Corrado)White
29---
30EGR Vacuum Regulator Solenoid Valve (Change-Over Valve- late 94+ Corrado)Green/GrayGreen/Gray
31Evap. Canister Purge Regulator ValveGreen/YellowGreen/Yellow
32Acceleration Sensor (late 94+ Corrado)White/Gray-
33Sensors Ground (Knock, Coolant, Throttle, Exhaust Gas Temp, Intake Air Temp, RPM, Manifold Pressure, Acceleration Sensors)BrownBrown
34Knock Sensor 1GrayGray
35Leak Detection Pump, Fuel Cut-off Valve (A3)--
36Intake Air Temperature SensorBlue/GreenBlue/Green
37Air Conditioning "On" Switch (At Compressor)GreenGreen
38Ignition Switch Start/Run PowerBlack/GreenBlack
39Air Conditioning "On" Switch (Inside Cabin)Blue/RedBlue
40Throttle Position Sensor Signal 1Green/WhiteGreen/White or Green/Gray
41Throttle Position Sensor PowerBlack/GrayBlack/Yellow (also cam position sensor)
42Oxygen Sensor 1 Sensor Ground (Shared for both sensors- late 94+ Corrado)YellowYellow
43Data Link Connector (K-Line)Gray/WhiteGray/White
44Camshaft Position SensorWhite/RedWhite/Red
45---
46Leak Detection Pump (A3)--
47Oxygen Sensor 2 Heater Ground (late 94+ Corrado)Red/Brown-
48---
49Secondary Air Injection Relay Turn-OnRed/Gray-
50(Various- ground-switched)Red/Yellow (N180 Change Over Valve- Passat), Red/Gray (AIR Relay, Ctrl. No. 111- Corrado from late 1993)Red/Gray (AIR Relay, Ctrl. No. 111)
51To Instrument Cluster (MFA MPG)Violet/WhiteViolet/White
52Coil Pack Pin 4Black/Violet-
53Idle Air Control Valve (OBD1), Throttle Valve Motor - (OBD2)Black/WhiteBlack/White
54Battery PowerRed/YellowRed/Yellow
55GroundBrown/BlackBrown/Black
56GroundBrown/WhiteBrown/White
57Knock Sensor 2Yellow or Green/Yellow-
58Ground (OBD1 Automatic Only), Oxygen Sensor 2 Sensor Ground (OBD2)WhiteWhite
59Mass Airflow SensorBlack-
60Coil Pack Pin 3Black/Blue-
61---
62Throttle Position Sensor Signal 2, or MAP Sensor (Corrado)White/Green (late 94+ Corrado only)-
63---
64---
65Vehicle Speed SensorBlue/WhiteWhite/Yellow
66Oxygen Sensor 2 Heater GroundBrown/White (late 94+ Corrado only)-
67Engine RPM Sensor GroundRedRed
68Engine RPM Sensor SignalGreenGreen