DTC P0703:00 [L5]: Notes
WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
DETECTION CONDITION & POSSIBLE CAUSES
| DTC P0703:00 |
Brake switch input circuit problem |
| DETECTION CONDITION |
- The PCM monitors the input signal from the brake switch No. 1. If the input signal does not change while following decelerating 8 times,
the PCM determines that there is a brake switch No. 1 input circuit problem.
MONITORING CONDITIONS
- Vehicle speed: from above 30 km/h {19 mph} to 30 km/h {19 mph} or less
- Deceleration rate: exceed 3.8 km/h {2.4 mph} per 0.1 s
Diagnostic support note
- This is a continuous monitor (CCM).
- The MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
- PENDING CODE is available if the PCM detects the above malfunction condition during the first drive cycle.
- FREEZE FRAME DATA is available.
- The DTC is stored in the PCM memory.
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| POSSIBLE CAUSE |
- Short to ground in wiring harness between brake switch terminal B and battery positive terminal
- Open circuit in wiring harness between brake switch terminal B and battery positive terminal
- PCM connector or terminal malfunction
- Short to ground in wiring harness between brake switch terminal D and PCM terminal 1AB
- Short to power supply in wiring harness between brake switch terminal D and PCM terminal 1AB
- Open circuit in wiring harness between brake switch terminal D and PCM terminal 1AB
- Brake switch connector or terminal malfunction
- Brake switch No. 1 malfunction
- PCM malfunction
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 Courtesy of MAZDA MOTORS CORP.
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