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DTC P0571:00: Notes

DTC P0571:00 (MZR 1.5) DETECTION CONDITION AND POSSIBLE CAUSES

DTC P0571:00 Brake switch circuit problem
DETECTION CONDITION 
  • The PCM monitors changes in the input voltage for the 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)/Snapshot data is not available.
  • The DTC is stored in the PCM memory.
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.
  • Brake switch connector or terminals malfunction
  • Short to ground or open circuit in brake switch No. 1 power supply circuit
    • ATX:
    • Short to ground in wiring harness between MAIN 200 A fuse and brake switch terminal B
    • MAIN 200 A fuse and/or STOP 10 A fuse malfunction
    • Open circuit in wiring harness between battery positive terminal and brake switch terminal B
      • MTX:
    • Short to ground in wiring harness between MAIN 200 A fuse and brake switch terminal A
    • MAIN 200 A fuse and/or STOP 10 A fuse malfunction
    • Open circuit in wiring harness between battery positive terminal and brake switch terminal A
  • Open circuit in wiring harness between brake switch terminal C and body ground (ATX)
  • Open circuit in wiring harness between brake switch terminal B and body ground (MTX)
  • Short to ground in wiring harness between the following terminals:
    • Brake switch terminal D-PCM terminal 1G
    • Brake switch terminal A-PCM terminal 1I (ATX)
    • Brake switch terminal C-PCM terminal 1I (MTX)
  • PCM connector or terminals malfunction
  • Short to power supply in wiring harness between the following terminals:
    • Brake switch terminal D-PCM terminal 1G
    • Brake switch terminal A-PCM terminal 1I (ATX)
    • Brake switch terminal C-PCM terminal 1I (MTX)
  • Open circuit in wiring harness between the following terminals:
    • Brake switch terminal D-PCM terminal 1G
    • Brake switch terminal A-PCM terminal 1I (ATX)
    • Brake switch terminal C-PCM terminal 1I (MTX)
  • Brake switch malfunction
  • PCM malfunction
G06940403
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