Part 1
Checking the power supply and ground terminals for the control module
STC or DSTC
Question
Question
Does the car have a DSTC system?
Yes - DSTC
No - STC
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STC - Checking the ground terminals
DSTC - DSTC
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Checking the ground terminals
Connecting the breakout box
Connecting the breakout box
- Ignition off.
- Disconnect the ABS control module by pressing in the catch on the rear edge of the cover (wheel arch side). Carefully turn the cover upwards so that the locking catches release.
- Check control module and control module connector to ensure that: Male and female terminals are undamaged and properly attached (cannot be pressed in). Female terminal cables are correctly connected to the terminals.
- Pay particular attention to the terminals related to the diagnostic trouble code (DTC)/symptom.
- Connect adapter 951 1354 Adapter 25-pin ABS 850 951 1354 Adapter 25-Pin ABS 850 to the control module connector (wiring side) and connect breakout box 951 1428 Breakout box 951 1428 Breakout Box to the adapter.
- Control module disconnected.
- Then check ground terminals.
Continue -
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Checking ground terminals
- Ignition off.
- Switch off all equipment that takes power from the battery (courtesy lighting, radio etc).
- Connect an ohmmeter between battery negative terminal and #8 and #24 on the breakout box.
ohms
The ohmmeter should read approximately 0 for all readings.
OK - Return to the fault-tracing procedure where it was interrupted.
Not OK - Check ground terminal 1/1 (battery negative terminal) and cable between ground terminal and control module #8 and #24, for an open-circuit and contact resistance.-Return to the fault-tracing procedure where it was interrupted.
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Reading is OK
- Return to the fault-tracing procedure where it was interrupted.
Select "Continue".
Continue - Fault Found
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Value is not OK
- Check ground terminal 1/1 (battery negative terminal) and cable between ground terminal and control module #8 and #24, for an open-circuit and contact resistance.
- Return to the fault-tracing procedure where it was interrupted.
Select "Continue".
Continue - Fault Found
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FAULT FOUND - Checking the 15-supply to the control module
FAULT-TRACING FAILED - Checking the 15-supply to the control module
No Fault Found - Checking the 15-supply to the control module
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Checking the 15-supply to the control module
- Ignition off.
- Control module disconnected.
- Ignition on.
Connect a voltmeter between terminals #4 and #8 on the breakout box.
The voltmeter should read approximately battery voltage.
OK - Checking the 30-supply (valves) to the control module
Not OK - Checking fuse 11/9
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Checking fuse 11/9
Check that fuse 11/9 is intact.
Is fuse 11/9 intact?
Yes - Checking the voltage before the fuse
No - Checking for a short-circuit and replacing the component
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Checking for a short-circuit and replacing the component
Check the cable between control module terminal #4 and fuse 11/9 for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Then replace the fuse.
Select Continue when the fault has been remedied.
Continue - Verification
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Checking the voltage before the fuse
- Ignition on.
Connect a voltmeter between the left socket (engine side) on the fuse holder for fuse 11/9 and ground.
The voltmeter should read approximately battery voltage.
OK - Checking for an open-circuit in the cable
Not OK - Checking for an open-circuit in the cable
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Checking for an open-circuit in the cable
Check the cable between control module terminal #4 and fuse 11/9 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Select Continue when the fault has been remedied.
Continue - Verification
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Checking for an open-circuit in the cable
Check the cable between ignition switch terminal 15I and fuse 11/9 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Select Continue when the fault has been remedied.
Continue - Verification
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Checking the 30-supply (valves) to the control module
- Ignition off.
Connect a voltmeter between terminals #9 and #8 on the breakout box.
The voltmeter should read approximately battery voltage.
OK - Checking the 30-supply (pump motor) to the control module
Not OK - Checking fuses
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Checking fuses
Check that fuse 11/11 is intact.
Is the fuse intact?
Yes - Checking the voltage before the fuse
No - Checking for a short-circuit and replacing the component
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Checking for a short-circuit and replacing the component
Check the cable between control module terminal #9 and fuse 11/11 for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Then replace the fuse.
Select Continue when the fault has been remedied.
Continue - Verification
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Checking the voltage before the fuse
- Ignition on.
Connect a voltmeter between the left socket (engine side) on the fuse holder for fuse 11/11 and ground.
The voltmeter should read approximately battery voltage.
OK - Checking for an open-circuit in the cable
Not OK - Checking for an open-circuit in the cable
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Checking for an open-circuit in the cable
Check the cable between control module terminal #9 and fuse 11/11 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Select Continue when the fault has been remedied.
Continue - Verification
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Checking for an open-circuit in the cable
Check the cable between the battery positive terminal and fuse 11/11 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Select Continue when the fault has been remedied.
Continue - Verification
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Checking the 30-supply (pump motor) to the control module
- Ignition off.
Connect a voltmeter between terminals #25 and #8 on the breakout box.
The voltmeter should read approximately battery voltage.
OK - No Fault Found
Not OK - Checking fuses
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Checking fuses
Check that fuse 11/12 is intact.
Is the fuse intact?
Yes - Checking the voltage before the fuse
No - Checking for a short-circuit and replacing the component
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Checking for a short-circuit and replacing the component
Check the cable between control module terminal #25 and fuse 11/12 for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Then replace the fuse.
Select Continue when the fault has been remedied.
Continue - Verification
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Checking the voltage before the fuse
- Ignition on.
Connect a voltmeter between the left socket (engine side) on the fuse holder for fuse 11/12 and ground.
The voltmeter should read approximately battery voltage.
OK - Checking for an open-circuit in the cable
Not OK - Checking for an open-circuit in the cable
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Checking for an open-circuit in the cable
Check the cable between control module terminal #25 and fuse 11/12 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Select Continue when the fault has been remedied.
Continue - Verification
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Checking for an open-circuit in the cable
Check the cable between the battery positive terminal and fuse 11/12 for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Select Continue when the fault has been remedied.
Continue - Verification
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