Code 38, Brake Switch Error: Notes
PCM monitors activity of the normally-closed brake switch. Switch opens when brake pedal is applied. Code will set if PCM has seen conditions which would have required brake applications at least 7 times and no transition in brake switch has been detected.
NOTE:
Test numbers refer to numbers on diagnostic chart.
- Checks for voltage at brake switch.
- Simulates brake switch closed or brakes off. Checks brake switch circuit between PCM and switch.
- Checks circuit between brake switch and PCM.