Checking Function Of The ABS Warning Lamp
Checking the function of the ABS warning lamp
Connecting the breakout box
Connecting the breakout box
951 1426 31-pin adapter 951 1426 31-Pin Adapter 981 3190 Replaced by 9511428 981 3190 Replaced by 951 1428
Connecting the breakout box to the ABS control module
Is the breakout box connected to the ABS control module?
Yes - FAULT FOUND
No - Connecting the breakout box
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Connecting the breakout box
- Ignition off.
- Disconnect the ABS control module.
- Check the control module and the control module connector to ensure that:
The male and female terminals are undamaged and properly attached (cannot be pressed in).
The wiring for the female terminals are securely connected.
Check in particular those terminals that are relevant to the stored diagnostic trouble code (DTC) / symptoms.
Connect adapter 951 1426 31-pin adapter 951 1426 31-Pin Adapter to the control module connector (wiring side). Connect breakout box 981 3190 Replaced by 9511428 981 3190 Replaced by 951 1428 to the adapter.
Note! ABS control module terminals 1-40 correspond to terminals 1-40 on the breakout box.
Select Continue.
Continue - Checking the ground terminal
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Checking the ground terminal
- Ignition off.
- Switch of all power consuming components, such as the passenger compartment lighting and the radio.
Connect an ohmmeter between terminal 16 on the breakout box and the battery negative terminal.
The ohmmeter should read approximately 0 ohms.
OK - No Fault FoundFault-tracing information
Not OK - Checking for an open-circuit and contact resistance
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Checking for an open-circuit and contact resistance
Check ground terminal 31/2. Check the cable between ground terminal 31/2 and control module terminal 16 for:
an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
contact resistance according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Check the ground lead between the battery and the bodywork for:
an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
contact resistance according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Select "Continue" when the fault has been remedied.
Continue - Verification
Verification
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Verification
Verification
Verification
Hint: Check after repair that the fault has been rectified.
Proceed as follows:
- Switch off the ignition.
- Switch off all power consuming components such as the courtesy lighting and the radio.
- Connect an ohmmeter between terminal 16 on the breakout box and the battery negative terminal.
The ohmmeter should read approximately 0ohms.
OK - VERIFIED
Not OK - VERIFICATION FAILED
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VERIFIED - FAULT FOUND
VERIFICATION FAILED - Fault-tracing information
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Fault-tracing information
Information
Fault-tracing information
The fault should be diagnosed and remedied. Since this is not the case the fault-tracing process has failed.
Complete the fault-tracing for those fault or try again.
Do you want to terminate fault-tracing at this time?
Yes - FAULT-TRACING FAILED
No - Attempt New Test
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Attempt New Test - Connecting the breakout box
FAULT-TRACING FAILED - FAULT-TRACING FAILED
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FAULT FOUND - Checking the function of the ABS warning lamp
No Fault Found - Checking the function of the ABS warning lamp
FAULT-TRACING FAILED - Checking the function of the ABS warning lamp
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Checking the function of the ABS warning lamp
- Ignition off.
- Control module disconnected.
- Connect the combined instrument panel.
- Switch on the ignition.
Connect a temporary cable between terminals 40 and 1 on the breakout box.
Does the ABS warning lamp go out?
Yes - No Fault Found
No - Replacing the component
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Replacing the component
Try a new combined instrument panel.
Select Continue when the fault has been remedied.
Continue - Verification
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Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied as follows:
- Ignition off.
- Reinstall the connectors, components etc.
- Ignition on.
The ABS warning lamp must light when the ignition is switched to position II. It should go out after 4 seconds, or when the engine is started.
Hint: The ABS warning lamp does not go out if the control module has registered a fault.
Does the lamp go out approximately 4 seconds after the ignition is switched on?
Yes - VERIFIED
No - VERIFICATION FAILEDPAPER
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VERIFICATION FAILED - Fault-tracing information
VERIFIED - FAULT FOUND
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Fault-tracing information
Information
Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.
Do you want to exit fault-tracing?
Yes - FAULT-TRACING FAILED
No - Attempt New Test
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Attempt New Test - Checking the function of the ABS warning lamp
FAULT-TRACING FAILED - FAULT-TRACING FAILED
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