Fault-Tracing
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
-------------------------------------------------
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:
Continue - Troubleshooting procedure complete
-------------------------------------------------
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 - Troubleshooting procedure complete
No - Fault-tracing information
-------------------------------------------------
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 - Exit fault-tracing
No - Attempt New Test
------------------------
Attempt New Test - Checking the voltage and ground terminal
-------------------------------------------------