Component Tests and General Diagnostics

ABS, electrical testing

General notes
When performing electrical troubleshooting, refer to the wiring diagrams, and the test steps which follow. These steps apply to:
1 - vehicles without the self-diagnosis feature (up to VIN JE 048 300)
2 - vehicles for which the self-diagnosis feature does not determine the problem source

Note: In both cases:
^ perform Test steps 1-37, in sequence
^ perform only those procedures marked by a circle. Those marked with a diamond have already been performed
3 - vehicles with the self-diagnosis feature:
^ perform only those test steps recommended in the Blink Code Troubleshooting charts
^ perform all procedures marked with either a circle or a diamond.

Testing equipment
^ VAG 1598, Test box
^ VAG 1598/3, adaptor
^ VAG 1594, connector test kit
^ US 1119, multi-meter (or equivalent)

Note: Hoist equipment for raising/supporting vehicle is also needed (Test steps 5-8, 35-37).

Preliminary checks
- verify that fuses, S16, S53, and S54 are OK
- verify that ground wire near control unit is OK
- be sure ignition remains OFF during all test steps

Testing equipment, connecting



^ connect ABS control unit's multi-pin terminal to VAG 1598, using adaptor VAG 1598/3.
^ the control unit is not connected
^ A = control unit
^ specified test values are verified for US 1119 only, and are not necessarily applicable to other testing equipment

Test Procedures

Test Steps 1 - 3:

Test Steps 4 - 6:

Test Steps 7 - 10:

Test Steps 11 - 14:

Test Steps 15 - 17:

Test Steps 18 - 21:

Test Steps 22 - 26:

Test Steps 27 - 31:

Test Steps 32 - 35:

Test Steps 36 - 37: