Fault-Tracing

Fault-tracing

Checking the wiring and terminals








- Ignition off, wait for 10 seconds.
- Disconnect the connector for Supplemental restraint system module (SRS).
- Disconnect the connector from the central electronic module (CEM).
Check connectors for damage to pins and connections.
Check the connectors. Check for loose connections. Check for contact resistance. Check for oxidation.
Also check the other connectors and terminals that join the signal cable between the supplemental restraint system module (SRS) and the central electronic module (CEM).
Check the cable for a short-circuit to supply voltage.
Check the cable for short-circuit to ground.
Check the cable for an open-circuit.
Take readings between:
- Supplemental restraint system module (SRS) terminal #C2:26(#A1) and central electronic module (CEM) terminal #C3:18(#E18).
Remedy as necessary.

Other information
- Supplemental restraint system module (SRS): Connecting the breakout box Connection of Breakout Box, Supplemental Restraint System Module (SRS)
- Central electronic module (CEM): Connecting the breakout box For Connection of Breakout Box to Central Electronic Module (CEM).
- Supplemental restraint system module (SRS): Signal specification Signal Specification, Supplemental Restraint System Module (SRS)
- Central electronic module (CEM): Signal specification Signal Description Central Electronic Module (CEM)
- For further information, see the wiring diagram.
- Air bag supplemental restraint system Service and Repair
- Central electronic module (CEM): Control module relay box passenger compartment Control Module Relay Box Passenger Compartment
- Cable harness SRS system, repair Cable Harness SRS System, Repair
- Checking wiring and terminals Checking Wiring and Terminals

Select "Continue" when the fault has been remedied.

Continue - Verification

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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 - Exit fault-tracing

No - Attempt New Test

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Attempt New Test - Checking the wiring and terminals

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Verification




Verification

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




- Reinstall the connectors, components etc.
- Switch on the ignition. Wait 10 seconds.
Read diagnostic trouble codes by clicking the VCT2000 symbol.
If the fault is intermittent, the fault has been remedied.





Is the fault intermittent?

Yes - Troubleshooting procedure complete

No - Fault-tracing information

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