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DTC P2504: Notes

DTC P2504 [L3] DETECTION CONDITIONS AND POSSIBLE CAUSES

DTC P2504 Charging system voltage high
DETECTION CONDITION 
  • PCM judges generator output voltage is above 18.5 V  or battery voltage is above 16 V  for 5s during engine running.

Diagnostic support note 
  • This is a continuous monitor (Other).
  • The MIL does not illuminate.
  • FREEZE FRAME DATA (Mode 2/Mode12) is not available.
  • The DTC is stored in the PCM memory.
POSSIBLE CAUSE 
  • Generator is poorly connected
  • Generator malfunction
  • PCM is poorly connected
  • Short to power circuit between generator connector terminal D and PCM connector terminal 2AA
  • PCM malfunction
G06760525Courtesy of MAZDA MOTORS CORP.