Diagnostic Trouble Code (DTC) Information ECM-941C
Condition
The engine control module (ECM) compares the signal from the stop lamp switch using the signal for the brake pedal position sensor if these are within their permitted range. The engine control module (ECM) receives the brake pedal position sensor signal that is sent via the CAN network from the brake control module (BCM). The diagnostic trouble code (DTC) is stored in the engine control module (ECM) if the stop lamp switch signal is incorrect, outside its permitted range or does not correspond to the signal for the brake pedal position sensor.
The diagnostic trouble code (DTC) can be diagnosed when the ignition is on and the brake pedal is depressed.
Substitute Value
- The cruise control is disengaged when the fault is active.
Possible Source
- Contact resistance or oxidation in the terminals for the stop lamp switch or the brake pedal position sensor
- Open-circuit or short-circuit to ground in the wiring for the stop lamp switch
- Damaged stop lamp switch
- Damaged brake pedal position sensor.
Fault symptom[s]
- Cruise control does not function at all.