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DTC P2503: Notes

DTC P2503 DETECTION CONDITION AND POSSIBLE CAUSES

DTC P2503 Generator output voltage signal no electricity
DETECTION CONDITION 
  • PCM needs more than 20 A  from generator, and judges generator output voltage to be below 8.5 V  during engine running.

Diagnostic support note 
  • This is a continuous monitor (Other).
  • MIL does not illuminate.
  • PENDING CODE is available if PCM detects the above malfunction condition.
  • FREEZE FRAME DATA is not available.
  • DTC is stored in the PCM memory.
POSSIBLE CAUSE 
  • Generator malfunction
  • PCM and/or generator are poorly connected.
  • Open and/or short to GND in wiring harness from between generator terminal P and PCM terminal 2AJ
  • Open and/or short to GND in wiring harness from between generator terminal D and PCM terminal 2AI
  • Drive belt misadjustment
G04324063Courtesy of MAZDA MOTORS CORP.