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HOMESERVICE MANUALSMAZDA20086 S SPORT, 4D HATCHBACK, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISON-BOARD DIAGNOSTIC [ENGINE CONTROL SYSTEM (AJ]DTC P2503 [AJ]NOTES
2008 Mazda 6 s Sport, 4D Hatchback, Standard

DTC P2503 [AJ]: Notes

2008 Mazda 6 s Sport, 4D Hatchback, StandardSECTION Notes
DTC P2503 [AJ] DETECTION CONDITION AND POSSIBLE CAUSES

DTC P2503 Generator output voltage signal no electricity
DETECTION CONDITION 
  • The PCM needs 20 A or more  from the generator, and determines the generator output voltage to be 8.5 V or below  when the engine is running.

Diagnostic support note 
  • This is a continuous monitor (Other).
  • The MIL does not illuminate.
  • PENDING CODE is available if the PCM detects the above malfunction condition.
  • FREEZE FRAME DATA is not available.
  • DTC is stored in PCM memory.
POSSIBLE CAUSE 
  • Generator malfunction
    • Rectifier circuit malfunction
    • Brush abrasion
  • Connector or terminal malfunction
  • Open or short to ground circuit between generator terminal D and PCM terminal 2AP
  • Open or short to ground circuit between generator terminal P and PCM terminal 2AU
  • Cut drive belt off or came drive belt off
  • PCM malfunction
G04324221
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.