Engine Control Unit:
Pin / Function / Color, VR6 OBD1 / Color, ABA OBD1 / Color, ABA OBD2 / Color, VR6 OBD2
1 / Ground / Brown / Brown/Red / Brown/Red / Brown/Red
2 / Cylinder Injector / Gray/Yellow (Injector 6) / White/Gray (Injector 2) / White/Gray (Injector 4) / Gray/Blue (Injector 4)
3 / Cylinder Injector / Gray/Green (Injector 2) / - / - / Gray/Black (Injector 5)
4 / Cylinder Injector / Gray/Blue (Injector 4) / - / - / Gray/Yellow (Injector 6)
5 / Check Engine Light / Yellow/Black / Yellow/Black / Yellow/Black / Yellow/Black
6 / Fuel Pump Relay Turn-On / Yellow/Blue / Yellow/Blue / Yellow/Blue / Yellow/Blue
7 / Ground (also Auto. Trans. Harness, for PNP Relay) / Brown/Red / Brown/Red / Brown/Black (also Brown/Red- auto. only) / Brown/Black
8 / Coil Pack Pin 2 (VR6 Coilpack), Coil Signal (ABA, VR6 Dist.) / Black/Brown or Black Red (Dist.) / Black/Red / Black/Red / Black/Brown
9 / Engine Electronics Relay (3) Turn-On / Black/Brown / Black/Brown / - / -
10 / Ground (OBD1 EGR enable), Throttle Valve Motor Switch (OBD2) / Brown/White or White / Brown/White or White / Red/Green / White
11 / Automatic Transmission Control Module / Blue/Yellow / Blue/Yellow / Blue/Yellow / Blue/Yellow
12 / Oxygen Sensor 1 Heater Ground / - / - / Brown / Brown
13 / Oxygen Sensor 2 Signal / Black/Yellow (late 94+Corrado only) / - / White/Red / White/Red
14 / Coolant Temperature Sensor / Blue / Blue / Blue / Blue
15 / EGR Temperature Sensor / Violet / Violet / Violet (not connected to sensor) / -
16 / Mass Airflow Sensor Ground / Brown/Blue / Brown/Red / Brown/Blue / Brown
17 / Mass Airflow Sensor Signal / Red / Red / Blue / Blue
18 / Automatic Transmission Control Module / Yellow/Red / Yellow/Red / Yellow/Red / Yellow/Red
19 / Power for MAP and Acceleration Sensors (late 94+ Corrado) / Yellow/Black / - / - / -
20 / Oxygen Sensor 1 Signal / White / White / White / White
21 / Data Link Connector (L-Line) / Yellow / Yellow / Yellow (Automatic Only) / Yellow (Automatic Only)
22 / Tachometer Output / Green/Black / Green/Black / Green/Black / Green/Black
23 / Power From Engine Electronics Relay (3) Output (OBD1), Fuse 15 Power (OBD2) / Red/Blue / Red/Blue / Black/Yellow / Black/Yellow
24 / Cylinder Injector / Gray (Injector 1) / White/Black (Injector 1) / Gray (Injector 1) / Gray (Injector 1)
25 / Cylinder Injector / Gray/Black (Injector 5) / White/Green (Injector 3) / Gray/Green (Injector 2) / Gray/Green (Injector 2)
26 / Cylinder Injector / Gray/Red (Injector 3) / White/Blue (Injector 4) / Gray/Red (Injector 3) / Gray/Red (Injector 3)
27 / Idle Air Control Valve (OBD1), Throttle Valve Motor + (OBD2) / Red/Blue / White / Black / Black
28 / Heated Oxygen Sensor Relay Turn-On, Oxygen Sensor 1 Heater Ground (late 94+ Corrado) / White (Brown- late 94+ Corrado) / White / - / -
29 / - / - / - / - / -
30 / EGR Vacuum Regulator Solenoid Valve (Change-Over Valve- late 94+ Corrado) / Green/Gray / Green/Gray / Green/Gray (not connected to valve) / Green/White
31 / Evap. Canister Purge Regulator Valve / Green/Yellow / Green/Yellow / Green/Yellow / Green/Yellow
32 / Acceleration Sensor (late 94+ Corrado) / White/Gray / - / - / -
33 / Sensors Ground (Knock, Coolant, Throttle, Exhaust Gas Temp, Intake Air Temp, RPM, Manifold Pressure, Acceleration Sensors) / Brown / Brown / Brown/Blue / Brown/Blue
34 / Knock Sensor 1 / Gray / Gray / Gray / Gray
35 / Leak Detection Pump, Fuel Cut-off Valve (A3) / - / - / Yellow/Brown / -
36 / Intake Air Temperature Sensor / Blue/Green / Blue/Green / White/Gray / Blue/Green
37 / Air Conditioning "On" Switch (At Compressor) / Green / Green / Green / Green
38 / Ignition Switch Start/Run Power / Black/Green / Black / - / -
39 / Air Conditioning "On" Switch (Inside Cabin) / Blue/Red / Blue / Blue / Blue/Red
40 / Throttle Position Sensor Signal 1 / Green/White / Green/White or Green/Gray / Red/Blue / Green/White
41 / Throttle Position Sensor Power / Black/Gray / Black/Yellow (also cam position sensor) / Red/White / Black/Gray
42 / Oxygen Sensor 1 Sensor Ground (Shared for both sensors- late 94+ Corrado) / Yellow / Yellow / Yellow / Yellow
43 / Data Link Connector (K-Line) / Gray/White / Gray/White / Gray/White / Gray/White
44 / Camshaft Position Sensor / White/Red / White/Red / Green/White / White/Red
45 / - / - / - / - / -
46 / Leak Detection Pump (A3) / - / - / Gray/Violet / -
47 / Oxygen Sensor 2 Heater Ground (late 94+ Corrado) / Red/Brown / - / - / -
48 / - / - / - / - / -
49 / Secondary Air Injection Relay Turn-On / Red/Gray / - / Gray/Brown / Red/Gray or Gray/Brown
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) / Red/Yellow (N112 AIR Solenoid Purge Regulator Valve) / Red/Yellow (N112 AIR Solenoid Valve)
51 / To Instrument Cluster (MFA MPG) / Violet/White / Violet/White / Violet/White / Violet/White
52 / Coil Pack Pin 4 / Black/Violet / - / - / Black/Violet
53 / Idle Air Control Valve (OBD1), Throttle Valve Motor - (OBD2) / Black/White / Black/White / White / Black/White
54 / Battery Power / Red/Yellow / Red/Yellow / Red / Red
55 / Ground / Brown/Black / Brown/Black / - / -
56 / Ground / Brown/White / Brown/White / Brown/Black / Brown/Black
57 / Knock Sensor 2 / Yellow or Green/Yellow / - / - / Yellow or Green/Yellow
58 / Ground (OBD1 Automatic Only), Oxygen Sensor 2 Sensor Ground (OBD2) / White / White / Yellow or Black/Yellow / Yellow or Black/Yellow
59 / Mass Airflow Sensor / Black / - / - / -
60 / Coil Pack Pin 3 / Black/Blue / - / - / Black/Blue
61 / - / - / - / - / -
62 / Throttle Position Sensor Signal 2, or MAP Sensor (Corrado) / White/Green (late 94+ Corrado only) / - / Red/Gray / Red/Gray
63 / - / - / - / - / -
64 / - / - / - / - / -
65 / Vehicle Speed Sensor / Blue/White / White/Yellow / White/Yellow / Blue/White
66 / Oxygen Sensor 2 Heater Ground / Brown/White (late 94+ Corrado only) / - / Brown / Brown
67 / Engine RPM Sensor Ground / Red / Red / Red / Red
68 / Engine RPM Sensor Signal / Green / Green / Green / Green