Communication With the Steering Wheel Module (SWM), Signal Missing

Communication with the steering wheel module (SWM), signal missing

Checking wiring and terminals

Note! If diagnostic trouble codes (DTCs) are stored in the central electronic module (CEM) or the steering wheel module (SWM), fault trace these first.




- Ignition off.
Check the brake control module (BCM) connector. Check for damaged or bent terminal pins. Check for contact resistance. Check for oxidation.
Check the wiring for CAN communication. Check between the brake control module (BCM) terminal #11 (#A11) and terminal #8 (#A8) on the steering wheel module (SWM). Check between the brake control module (BCM) terminal #15 (#A15) and terminal #9 (#A9) on the steering wheel module (SWM). Check for an open-circuit. Check for a short-circuit to ground. Check for a short-circuit to supply voltage.
Check that the wiring is not too close to a source of interference such as a carphone etc.
Remedy as necessary.

Other information
- To connect the breakout box, brake control module (BCM), see: Connecting the breakout box, B5254T7 Connecting the Breakout Box, Brake Control Module (BCM)
- To connect the breakout box, steering wheel module (SWM), see: Connecting the breakout box, B5254T7 Connecting the Breakout Box, Steering Wheel Module (SWM)
- Checking wiring and terminals Checking Wiring and Terminals

Continue - FAULT FOUND

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