Faulty Signal. Permanent Fault

Faulty signal. Permanent fault

Checking the signal cable




- Ignition off
- Disconnect the connector from the central electronic module (CEM)
- Disconnect the 6-pin connector from the stepper motor.

Check the signal cables between:
- central electronic module (CEM) terminal #6A and stepper motor terminal #2
- central electronic module (CEM) terminal #7A and stepper motor terminal #3
- central electronic module (CEM) terminal #11A and stepper motor terminal #4
- central electronic module (CEM) terminal #12A and stepper motor terminal #5.
check for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. Check for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. Check for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
If there is an open-circuit, also check connector 54/3 for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

Check the ground lead between:
- 6-pin connector on the cable harness terminal #6 and ground.
check for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. Check for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Remedy as necessary.

Other information:
- See applicable wiring diagram
- To access or replace the central electronic module (CEM) connector, see Central electronic module (CEM), replacing Central Electronic Module (CEM), Replacing
- To access and replace the stepper motor, see
- To connect the breakout box, see Connecting the breakout box Connecting the Breakout Box, Central Electronic Module (CEM)
- For information about signals, see Signal specification Pinout Values and Diagnostic Parameters.













Is the signal cable OK?

Yes - Checking the component

No - Verification

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Checking the component
- Disconnect the 6-pin connector from the stepper motor.

Check the resistance between:
- the connector from the stepper motor terminals #5 and #6, approximately 22 ohms
- the connector from the stepper motor terminals #4 and #6, approximately 22 ohms
- the connector from the stepper motor terminals #3 and #6, approximately 22 ohms
- the connector from the stepper motor terminals #2 and #6, approximately 22 ohms.
Replace the stepper motor if the value deviates from the listed value.

Other information
- To access and replace the stepper motor, see






Continue - Verification

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Verification




Verification

Verification

Hint: After the repair it is necessary to check that the fault has been rectified.








- Ignition off.
- Connect connectors, install components, etc.
- Start the engine.
Check that diagnostic trouble code status changes from permanent to intermittent.





Is the diagnostic trouble code status intermittent?

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

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 - FAULT-TRACING FAILED

No - Attempt New Test

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FAULT-TRACING FAILED - No Fault Found

Attempt New Test - Checking the signal cable

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