DTC P0703: Brake Switch Input Circuit Malfunction: Condition
WARNING: This page is about a different car, the 2002 Mazda Protege5 and 2002 Mazda Protege. However, it is still accessible from the selected car via links, so may be relevant.
DTC is set when PCM has not received a change in brake switch signal while vehicle is accelerating and decelerating 10 times repeatedly. This is a continuous monitor. MIL is illuminated when PCM detects malfunction during 2 consecutive drive cycles. Possible causes are:
- Brake switch malfunction.
- Open circuit between brake switch and PCM.
- PCM malfunction.