DTC P0571: Notes
DTC P0571 [L3] DETECTION CONDITIONS AND POSSIBLE CAUSES
| DTC P0571 |
Brake switch circuit malfunction |
| DETECTION CONDITION |
- The PCM monitors changes in input voltage for brake switch No. 1 and No. 2 (signal from instrument cluster). If the PCM detects that both brake switches No. 1 and No. 2 remain on or off for 15 s
, it determines that the brake switch circuit has a malfunction.
Diagnostic support note
- This is a continuous monitor (Other).
- The MIL does not illuminate.
- FREEZE FRAME DATA (Mode 2/Mode 12) is not available.
- DTC is stored in PCM memory.
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| POSSIBLE CAUSE |
CAUTION:
- Inspect the brake switch with it installed to the brake pedal, otherwise the brake switch may not operate normally. If the brake switch is removed from the brake pedal, replace the brake switch with a new one.
- Communication error between PCM and instrument cluster
- Brake switch connector or terminal malfunction
- Brake switch malfunction
- Short to ground circuit between brake switch terminal C and instrument cluster terminal 2M
- Instrument cluster connector or terminal malfunction
- Open circuit between brake switch terminal B and body ground
- Open circuit between brake switch terminal C and instrument cluster terminal 2M
- Short to power between brake switch terminal C and instrument cluster terminal 2M
- PCM malfunction
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 Courtesy of MAZDA MOTORS CORP.
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