DTC P2503 [LF]: Notes

DTC P2503 (LF) DETECTION CONDITION AND POSSIBLE CAUSE

DTC P2503	Charging system voltage low input
DETECTION CONDITION	The PCM needs more than 20 A from the generator, and judges the generator output voltage to be below 8.5 V during the engine running. Diagnostic support note This is a continuous monitor (other). The MIL does not illuminate. FREEZE FRAME DATA (Mode 2/Mode 12) is available. The DTC is stored in the PCM memory.
POSSIBLE CAUSE	Drive belt exceed limit Generator connector or terminals malfunction Short to ground in wiring harness between generator terminal D and PCM terminal 2AI Short to ground in wiring harness between generator terminal P and PCM terminal 2AJ PCM connector or terminals malfunction Open circuit in wiring harness between generator terminal D and PCM terminal 2AI Open circuit in wiring harness between generator terminal P and PCM terminal 2AJ Generator malfunction PCM malfunction
Courtesy of MAZDA MOTORS CORP.

DTC P2503

Charging system voltage low input

DETECTION CONDITION

The PCM needs more than 20 A from the generator, and judges the generator output voltage to be below 8.5 V during the engine running.

Diagnostic support note

POSSIBLE CAUSE

Drive belt exceed limit
Generator connector or terminals malfunction
Short to ground in wiring harness between generator terminal D and PCM terminal 2AI
Short to ground in wiring harness between generator terminal P and PCM terminal 2AJ
PCM connector or terminals malfunction
Open circuit in wiring harness between generator terminal D and PCM terminal 2AI
Open circuit in wiring harness between generator terminal P and PCM terminal 2AJ
Generator malfunction
PCM malfunction

Courtesy of MAZDA MOTORS CORP.