Checking The Ground Terminal
Checking the ground terminal
Connecting the breakout box
Connecting the breakout box
951 1371 Adaptor 951 1371 Adaptor 981 3190 Replaced by 9511428 981 3190 Replaced by 951 1428
Connecting the breakout box to the ABS
Is the breakout box connected to the control module?
Yes -
No -
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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 is securely connected.
Check in particular those terminals that are relevant to the stored diagnostic trouble code (DTC) / symptoms.
Connect adapter 951 1371 Adaptor 951 1371 Adaptor 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.
Continue -
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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 #1 on the breakout box and the battery negative terminal.
The ohmmeter should read approximately 0 ohms.
OK - No Fault Found
Not OK -
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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 #1 for:
check for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
check for 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:
check for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
check for contact resistance according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Continue -
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Verification
VERIFIED - FAULT FOUND
VERIFICATION FAILED -
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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 - Exit fault-tracing
No - Attempt New Test
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Attempt New Test -
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No Fault Found - Fault-tracing information
FAULT FOUND - Fault-tracing information
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Fault-tracing information
The cause of the fault was the ground terminal.
Continue - Verification
Verification
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Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied as follows.
- Switch off the ignition.
- Disconnect the breakout box if this has not already been done.
- Reinstall the connectors, components etc.
- Switch on the ignition.
When the ignition is switched on, the control module lights the ABS warning lamp. The ABS warning lamp should go out again after approximately 4 seconds.
Hint: The lamp does not go out if the control module has detected a fault.
Is the function of the ABS warning lamp OK?
Yes - VERIFIED
No - VERIFICATION FAILED
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VERIFIED - FAULT FOUND
VERIFICATION FAILED - Fault-tracing information
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Fault-tracing information
Information
Attempt New Test - Checking the ground terminal
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Fault-tracing information
The ground terminal was OK and did not cause the fault.
Continue - No Fault Found
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Verification
VERIFIED - FAULT FOUND
VERIFICATION FAILED - Fault-tracing information
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Fault-tracing information
Information
Attempt New Test - Connecting the breakout box
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