ABS

This page applies to ABS systems on Mk2s, Corrados, and early Passats (with the 3 chamber system).

To access the fault system, turn the ignition on (but don't start the car) and place a jumper between the brown wire on the black connector and the yellow/blue wire on the blue or white connector under the shift boot, for at least 5 seconds. Remove the jumper, and the ABS light on the dashboard should flash one long pulse, then several shorter pulses (with spaces) indicating codes. Please click here for an example.

The example picture above would indicate a 1234 code. Connect the jumper again for at least 4 seconds to advance to the next code. When "0000" (2.5s flashes at 2.5s intervals) or "4444" is read, the sequence is completed. To clear the codes, connect the jumper with the ignition off, then turn it on. After 5 seconds, remove the jumper, and "4444" should be read. NOTE: Code 1111 is a common misdiagnosis. It will almost always come up shared with any other code. If you see this code by itself, check all the wiring, and as a last resort, replace the control unit.

Items with an asterisk (*) are available on ABS with EDL lock systems only.
Code Description Action
0000 End of output -
1111 Controller Controller faulty
1112 Inlet valve FL Faulty wiring, connector, or valve coil
1114 Inlet valve FR Faulty wiring, connector, or valve coil
1122 Inlet valve, rear Faulty wiring, connector, or valve coil
1132 Outlet valve FL Faulty wiring, connector, or valve coil
1134 Outlet valve FR Faulty wiring, connector, or valve coil
1142 Outlet valve, rear Faulty wiring, connector, or valve coil
1222 Main valve Faulty wiring, connector, or valve coil
1233 Wheel-speed sensor FL Speed sensor cable, wiring connection, speed sensor, excessive or insufficient gap between sensor and pulse wheel, sensor or wheel dirty or damaged
1241 Wheel-speed sensor FR Speed sensor cable, wiring connection, speed sensor, excessive or insufficient gap between sensor and pulse wheel, sensor or wheel dirty or damaged
1243 Wheel-speed sensor RR Speed sensor cable, wiring connection, speed sensor, excessive or insufficient gap between sensor and pulse wheel, sensor or wheel dirty or damaged
1311 Wheel-speed sensor RL Speed sensor cable, wiring connection, speed sensor, excessive or insufficient gap between sensor and pulse wheel, sensor or wheel dirty or damaged
1312 ABS pressure warning switch, brake fluid warning switch Wiring at switches shorted to positive, excessive pressure or low brake fluid
1223 Differential lock valve 1* Faulty wiring, connector, or valve coil
1224 Differential lock valve 2* Faulty wiring, connector, or valve coil
2234 Supply voltage* Faulty wiring, wiring connections, fuse S54 or ABS relay
2133 ABS pressure warning switch* Wiring at switch shorted to positive, excessive pressure
4444 No faults -