Code 38 - Brake Switch: Notes
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 1993 Pontiac Bonneville, 1993 Oldsmobile Ninety-Eight, 1993 Oldsmobile Eighty-Eight, 1993 Buick Riviera, and 1993 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
Code 38 will set if Code 24 is not present, status at brake input terminal of control module has not changed from high to low and vehicle speed has been greater than 35 MPH and back to zero MPH a precalibrated number of times.
NOTE:
Test numbers refer to numbers on diagnostic chart.
- Jumpering brake switch determines if ECM and wiring for brake switch are okay.
- Determines if brake switch is out of adjustment or is faulty.
- Verifies voltage to brake switch.