LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Mazda >> 2006 >> 6 s, 4D Hatchback, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> On-Board Diagnostic [Engine Control System AJ] >> DTC P2503 >> Notes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC P2503: 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