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Home >> Mazda >> 2009 >> 5 Touring, 2.3 L >> Repair and Diagnosis >> Engine Performance >> System >> On-Board Diagnostic [Engine Control System L3] >> DTC P2503 [L3] >> Notes

DTC P2503 [L3]: Notes

DTC P2503 (L3) DETECTION CONDITION & POSSIBLE CAUSES

DTC P2503 Charging system voltage low
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).
  • The MIL does not illuminate.
  • FREEZE FRAME DATA is not available.
  • The DTC is stored in the PCM memory.
POSSIBLE CAUSE 
  • Drive belt misadjustment
  • PCM and/or generator are poorly connected
  • Short to ground in wiring between generator terminal D and PCM terminal 2AA
  • Short to ground in wiring between generator terminal P and PCM terminal 2AF
  • Open in wiring the between generator terminal D and PCM terminal 2AA
  • Open in the wiring between generator terminal P and PCM terminal 2AF
  • Generator malfunction
  • PCM malfunction
G06149075