ABS Warning Lamp Does Not Come On

Fault symptoms
Lamp test is conducted when the ignition is turned on. ABS warning lamp should light for about 3 seconds. ABS warning lamp does not come on.

Conditions
Bus communication must be functioning. See System overview, refer to Description and Operation.

Diagnostic help
The ABS warning lamp can be activated with the diagnostic tool.
- Select "Activate"
- Select "ABS lamp"Diagnostic procedure
1. Check ABS Lamp Functionality





Unplug the connector
Control module ABS 547





Turn the ignition switch to the ON position.





Connect a jumper lead between pins 19 and 21 of the female connector.





^ The ABS lamp should light up

Is the function correct?

NO
Go To Step 2

YES
Go To Step 3

2. Checking The Lead





^ Check the lead between pin 21 of the ABS control module and PIN 10 of the MIU (K20).

Is the wiring OK?

NO
Go To Step 5

YES
Go To Step 4

3. Checking The Lead





^ Check the control module connector for moisture, corrosion and displaced pins.

Correct as necessary:
Go To Step 6

4. Diagnostic Procedure

^ Continue with fault diagnosis on the MIU, refer to Instrument Panel, Gauges and Warning Indicators.

5. Rectifying The Lead





^ Repair or replace the lead.

When repair is complete:
Go To Step 6

6. Final Check





^ Clear the diagnostic trouble codes in all systems

^ Carry out a functionality test.

Is the function correct?

NO
Go To Step 7

YES
Go To Step 8

7. Final Check
See Before changing a control module, refer to General Fault Diagnosis.
^ Diagnosis for this fault code is complete.

8. Final Check
The steps taken to correct the fault were correct.
^ Diagnosis is complete.