Fault-Tracing Information

Fault-tracing

Checking the voltage and ground terminal
Check the fuse for the Start Control Unit (SCU).
Check the cables and connections between the Start Control Unit (SCU) and the Central electronic module (CEM).
Check the ground cable for the Start control module (SCU) for open circuit and short-circuit to voltage.





Was a fault detected?

Yes - Verification

No - Checking communication

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Checking communication
Check the communication with Start control module (SCU) by reading out the control module's serial number.
If the communication works and it is possible to read out serial number, the problem is intermittent.
If the fault is intermittent it means that it has been registered previously but is no longer present.
Intermittent faults may be due to interference at start up of the control module or may be a different type of fault which occurs on different occasions. The fault is evaluated depending on how it occurs.
If the fault recurs, replace the control module.

Other information:
- Ignition lock Service and Repair









Continue - No Fault Found

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Verification




Verification

Hint: After carrying out the repair, check that the fault has been remedied.








- Ignition off
- Reinstall the connectors, components etc.
Check the communication with Start control module (SCU) by reading out the control module's serial number.









Is communication established?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFICATION FAILED - Fault-tracing information

VERIFIED - VERIFIED

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Fault-tracing information

Attempt New Test - Checking the voltage and ground terminal

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