Signal Missing

Signal missing. Permanent fault

Checking the signal








- Ignition off
- Check the control module for the steering wheel angle sensor and the steering wheel module (SWM) connectors. 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
- Turn the steering wheel to the limit position in both directions
- Read off diagnostic trouble codes (DTCs).
If the status of the diagnostic trouble code (DTC) is intermittent, the problem was probably caused by contact resistance or oxidation in one of the connectors for the control modules.

Other information:
- For information about signals, see Signal description, Control unit for the steering wheel angle sensor (SAS) Signal Specification.





Is the status of the diagnostic trouble code (DTC) intermittent?

Yes - Fault Found

No - Checking wiring and sensors

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

Checking wiring and sensors








- 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 #1 (terminal (#A25) and steering wheel module (SWM) terminal #6 (terminal #A6)
terminal #8 (terminal (#A32) and steering wheel module (SWM) terminal #7 (terminal #A7)
terminal #9 (terminal (#A33) and steering wheel module (SWM) terminal #12 (terminal #A12)
for an open-circuit. See 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 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 connect the breakout box to the steering wheel module (SWM), see Steering wheel module (SWM), replacing Service and Repair
- For information about signals for the control module for the steering wheel angle sensor, see Signal description, Control unit for the steering wheel angle sensor (SAS) Signal Specification
- For information about signals to the steering wheel module (SWM), see Signal specification Signal Specification, Steering Wheel Module (SWM).










Continue - Verification

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

Verification




Verification

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








- Ignition off.
- Connect the connectors, install the components, etc.
- Ignition on.
- Turn the steering wheel to full lock in both directions.
- Read the status of the diagnostic trouble code.





Is the status of the diagnostic trouble code intermittent?

Yes - VERIFIED

No - VERIFICATION FAILEDPAPER

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

VERIFIED - Fault Found

VERIFICATION FAILED - 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 - FAULT-TRACING FAILED

No - Attempt New Test

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

FAULT-TRACING FAILED - FAULT-TRACING FAILED

Attempt New Test - Checking the signal

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