Diagnostic and Repair Procedure

Diagnostic Procedure:
1) Disconnect the 35-pin connector from the ABS Control Unit.

2) Connect the Universal Adaptor to the harness using the appropriate adaptor lead.

3) Using a Fluke 83 Multimeter (or equivalent) check the resistance of the individual sensor leads (refer to appropriate ETM for proper pin numbers.

The resistance should be between 650-1,600 ohms.

Wiggle and tap the connection of the sensor lead/sensor.

If a fault is not detected, try cooling the lead and connector, followed by wiggling and tapping the sensor lead/sensor.

If a fault is still not detected, repeat this procedure, heating (with a hot air gun) the lead and connector.



Repair Procedure:
Read through the entire repair procedure before proceeding.

1) Disconnect the sensor lead from the wheel sensor connector.

2) Cut the defective lead off at the point where it enters the main harness.














3) Connect the new lead to the wheel sensor connector. Route the lead through the vehicle to the ABS Control Unit as illustrated.

4) Disassemble the 35 pin connector as described in Group 61 of the Repair Manual.



5) Cut the excess wiring off the new lead.









6) Strip away approx. 100 mm of the outside covering exposing the two wires (E30) or 1 wire and screening (E32/E34).



7) On an E30: Connect the two connectors supplied in the kit to the two wires.



8) Remove the two wires from the 35-pin connector for the lead that is being replaced.

Note:





On an E32/E34, remember which terminal the screened wire came out of as the new one must go in the same terminal.

9) Insert the new wires into the 35-pin connector housing.

Note:





On an E32/34, make sure the screened wire is inserted into the same terminal that the previous screened wire was taken out of.

10) Remove the old wires from the connector and connect to the ABS Control Unit ground point as follows:

E30 - connect both wires.

E32/E34 - only connect the screened wire. Tape the other wire back against the harness.

Failure to do this may result in erroneous faults due to these wires acting as antennas.

11) Reassemble 35-pin connector.