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HOMESERVICE MANUALSMAZDA20086 S SPORT, 4D HATCHBACK, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 589 (ON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM L3 WITH TC])DTC P2504NOTES
2008 Mazda 6 s Sport, 4D Hatchback, Standard

DTC P2504: Notes

2008 Mazda 6 s Sport, 4D Hatchback, StandardSECTION Notes
WARNING: This page is about a different car, the 2007 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
DTC P2504 DETECTION CONDITION AND POSSIBLE CAUSES

DTC P2504 Charging system voltage high
DETECTION CONDITION 
  • PCM determines that the generator output voltage is above 18.5 V  or the battery voltage is above 16.0 V  while the engine is running.

Diagnostic support note 
  • This is a continuous monitor (Other).
  • The MIL does not illuminate.
  • FREEZE FRAME DATA is not available.
  • DTCs are stored in the PCM memory.
POSSIBLE CAUSE 
  • Short to the power circuit between generator connector terminal D and PCM connector terminal 1 AD
  • Generator malfunction
  • PCM and/or generator are poorly connected
G04324154Courtesy of MAZDA MOTORS CORP.
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