2006 Mazda MPV ESFACTORY OEM SERVICE PROCEDURE

DTC P0703: Notes

DTC P0703 [AJ] DETECTION CONDITION AND POSSIBLE CAUSES

DTC P0703 Brake switch input malfunction
DETECTION CONDITION 
  • The PCM monitors changes in input voltage from the brake switch. If PCM does not detect PCM terminal 82 voltage changes while alternately accelerating and decelerating 8 times  the PCM determines that brake switch circuit has malfunction.

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.
  • DTC is stored in PCM memory.
POSSIBLE CAUSE 
  • Brake switch malfunction
  • Short to power harness between brake switch terminal B and PCM connector terminal 82.
  • Open harness between brake switch terminal and PCM connector terminal 82.
  • Open harness between battery positive terminal and brake switch terminal.
  • PCM malfunction
G04327945Courtesy of MAZDA MOTORS CORP.
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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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