Notes

ABS/EDL/ASR Bosch 5.3, electrical testing

For ABS Bosch 5.3, the following versions are possible:
^ ABS
^ ABS/EDL
^ ABS/EDL with ASH





Special Tools and Equipment
^ VAG1598 test box
^ VAG1598/27 adapter
^ VAG1594A connector test kit
^ VAG1526A multimeter

Test steps are valid for:
^ Vehicles for which On Board Diagnostic (OBD) does not result in suggestions regarding the malfunction cause. In this case, the electrical test should be performed in its entirety.
^ Vehicles for which On Board Diagnostic (OBD) results in direct suggestions regarding the malfunction cause. In this case, only perform test steps recommended in the DTC table (selective troubleshooting).
^ For an overview of all test steps in the electrical test.

Test requirements
^ Fuses -S7- and -S53- must be OK (remove fuses from fuse holder for test).
^ Before beginning the test, switch off ignition and electrical consumers (headlights, lighting, fans)
^ Disconnect multi-pin connector from ABS control module (w/EDL) -J104- and connect VAG1598 test box to connector of wiring harness using VAG1598/27 adapter.

Specified values refer to readings on the VAG1526 and are not necessarily applicable for other test units.

Multi-pin harness connector with terminal assignments

Note: All terminals omitted here are not occupied at the moment and must not be connected to other components under any circumstance.





Terminal assignment of harness connector, wiring harness/ABS control module (w/EDL) -J104-





Terminal assignment of harness connectors for voltage supply and On Board Diagnostic (OBD) with VAG1551 Scan Tool (ST)
Terminal 4 = Ground (GND) (terminal 31)
Terminal 16 = B+ (terminal 30) via S21
Terminal 7 = K-wire to ABS control module (w/EDL)-J104-terminal 11 via connection in instrument cluster wiring harness (A76)














Overview of test steps








Test table
Notes for test table
^ The socket designations of the VAG1598 test box are identical to file terminal designations of the ABS control module (w/EDLJ -J104- in the wiring diagram.
^ If the measured values do not match the specifications, carry out the corrective actions on the right side of the table.
^ Use the VAG1594 connector kit for continuity tests (bridging).
^ If measured values differ only slightly from specified values, clean sockets and connectors of the testers and test leads (using G 000 700 04 contact spray) and repeat test. Before replacing the relevant components, check wires and connections and also repeat resistance measurement at component, especially for specified values under 10 Ohms.