Testing Electrically

Testing Electrically

Special tools, testers and auxiliary items required
^ Adapter Cable VAG1598/36
^ Adapter Set VAG1594A
^ Multimeter VAG 1526 A
^ Hose clip pliers VAG 1921
^ Test Box VAG1598A

Test Steps for ABS/Electronic Differential Lock/Anti-Slip Regulation/Electronic Stabilization Program Only
^ For vehicles on which the On Board Diagnostic (OBD) does not give any indication of the source of the malfunction. Work through the complete electrical check.
^ For vehicles on which the OBD provides a direct indication of the source of the malfunction. Only carry out the test steps recommended in the DTC table (directed entry).

An overview of all the test steps in the electrical check can be found on Test Steps, Overview.

Test Prerequisites
^ Before starting the test, switch ignition and all electrical consumers off (headlights, lighting, fans etc.).
^ Fuses must be OK. (pull fuse out of holder to check)

- Pull fuse holder out of cable channel.





- Release ABS Control Module J104 (w/EDL) connector - arrow 1 - and pull off - arrow 2 -.





- Connect Test Box VAG 1598/36 - 1 - to multi-pin connector of ABS Control Module J104 (w/EDL) - 2 -.

The specified values are matched to the VAG1526 and are not necessarily applicable for other test modules.

Voltage Supply and VAG 1551 Self-Diagnosis Connectors, Terminal Assignment








Connector T47 Wiring Harness/ABS Control Module J104, Terminal Assignment








Test Steps, Overview








Test Table, Test Steps 1 through 16

Test Table, General Information
^ The socket designations of Adapter VAG 1598/36 are identical to the ABS Control Module J104 (w/EDL) contact designations in wiring diagram.
^ If the readings obtained deviate from the specifications, carry out malfunction repair measure in the right-hand part of the table.
^ Continuity checks with Adapter Set VAG 1594A (bridging).
^ If the measured figures only deviate slightly from the specifications, clean sockets and plugs of the testers and adapter cables (with contact spray G 000 700 04) and repeat check. Before replacing components, check wiring and connections and also, particularly for specifications of less than 10 ohms, repeat resistance check on the component.

Test Steps 1-3:

Test Table, Test Steps 17 through 24

Test Step 17a:

Test Step 17a: