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DTC P0571: Notes

DTC P0571 DETECTION CONDITION AND POSSIBLE CAUSES

DTC P0571 Brake switch circuit problem
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 is not available.
  • DTC is stored in PCM memory.
POSSIBLE CAUSE 
  • Brake switch malfunction
  • Open circuit between brake switch terminal B and instrument cluster terminal 2M
  • Open circuit between brake switch terminal C and body ground
  • Short to power between brake switch terminal B and instrument cluster terminal 2M
  • Short to body ground circuit between brake switch terminal B and instrument cluster terminal 2M
  • Communication error between PCM and instrument cluster
  • PCM malfunction
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