DTC P0703: Brake Switch Malfunction: Condition

DTC is set when PCM has not received brake switch signal while vehicle is operating. Malfunction has to occur 10 consecutive times. Possible causes are:

• Brake switch malfunction.
• Improperly installed brake switch.
• Brake light malfunction.
• Poor connection of brake switch and PCM harness connectors.
• Short to power circuit between brake switch terminal "B" and terminal No. 92 at Powertrain Control Module (PCM).
• Short to power circuit between brake switch terminal "B" and brake light.
• Open circuit between brake switch terminal "A" and terminal No. 92 at Powertrain Control Module (PCM).
• Open circuit between ground and brake light.