Code P0703, TCC Brake Switch Input: Notes

WARNING: This page is about a different car, the 1994 Oldsmobile Ninety-Eight and 1994 Buick Park Avenue. However, it is still accessible from the selected car via links, so may be relevant.

PCM monitors status of TCC brake switch input. Code P0703 will set when the following conditions are present.

Code P0501 is not present.
Vehicle speed has been greater than 35 MPH for 10 seconds and back to zero MPH 5 times.
TCC brake switch input status has not changed from released to applied, or applied to released as displayed on Tech 1.

When Code P0703 is set, PCM will not allow 4th gear, cruise control or TCC operation. Code P0703 does not illuminate the Malfunction Indicator Light (MIL).