Faulty Signal

Faulty signal

Checking the voltage




- Ignition off
- Disconnect the connector for the control module for the steering wheel angle sensor
- Disconnect the connector for the steering wheel module (SWM)
- Check the connectors for control module for the steering wheel angle sensor and for the steering wheel angle sensor. Check for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault
- Reinstall the components, reconnect the connectors etc.
- Ignition on
- Read off the voltage over the central electronic module (CEM) and the control module for the steering wheel angle sensor.
The voltage must be approximately 12 V for both the central electronic module (CEM) and the control module for the steering wheel angle sensor.

Other information:
- To disconnect the connector for the control module for the steering wheel angle sensor, see Steering wheel module (SWM), replacing Service and Repair
- To disconnect the connector for the steering wheel module (SWM), see Steering wheel module (SWM), replacing Service and Repair.





Was the voltage OK?

Yes - Fault Found

No - Checking the wiring

-------------------------------------------------

Checking the wiring








- Ignition off
- The control module for the steering wheel angle sensor disconnected
- Steering wheel module (SWM) disconnected
- Connect the breakout box to the control module for the steering wheel angle sensor and to the steering wheel module (SWM).
Check the wiring between the control module for the steering wheel angle sensor terminal #2 (#A26) and steering wheel module (SWM) terminal #6 (#A6). Check for a short-circuit to supply voltage according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Try replacing the steering wheel angle sensor if no fault is found in the wiring.

Other information:
- To disconnect the control module for the steering wheel angle sensor, see Steering wheel module (SWM), replacing Service and Repair
- To connect the breakout box to the steering wheel module (SWM), see Steering wheel module (SWM), replacing Service and Repair
- To connect the breakout box to the control module for the steering wheel angle sensor, see Connecting the breakout box to the steering angle sensor Connecting the Breakout Box, Steering Wheel Angle Sensor Module (SAS)
- To disconnect and replace the steering wheel angle sensor, see Contact reel / steering wheel angle sensor, replacing Contact Reel / Steering Wheel Angle Sensor, Replacing.










Continue - Verification

-------------------------------------------------

Verification




Verification








- Ignition off.
- Connect the connectors, install the components, etc.
- Ignition on.
- Read the voltage over the central electronic control unit (CEM) and the steering wheel angle sensor (SAS) control unit.
Voltage should be approximately 12 V for both the central electronic control unit (CEM) and the steering wheel angle sensor control unit.





Is voltage OK?

Yes - VERIFIED

No - VERIFICATION FAILED

------------------------

VERIFIED - Fault Found

VERIFICATION FAILED - Diagnostic trouble code (DTC) information

-------------------------------------------------

Diagnostic trouble code (DTC) 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

------------------------

Attempt New Test - Checking the voltage

FAULT-TRACING FAILED - FAULT-TRACING FAILED

-------------------------------------------------