DTC P2504: Notes

WARNING: This page is about a different car, the 2007 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.

DETECTION CONDITION AND POSSIBLE CAUSE (DTC P2504)

DTC P2504	Charging system voltage high
DETECTION CONDITION	PCM judges generator output voltage is above 18.5 V or battery voltage is above 16.0 V during engine 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 during the first drive cycle. FREEZE FRAME DATA is available. The DTC is stored in the PCM memory.
POSSIBLE CAUSE	Short to power circuit between generator connector terminal D and PCM connector terminal 2AI Generator malfunction PCM and/or generator are poorly connected
Courtesy of MAZDA MOTORS CORP.

DTC P2504

Charging system voltage high

DETECTION CONDITION

PCM judges generator output voltage is above 18.5 V or battery voltage is above 16.0 V during engine 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 during the first drive cycle.
FREEZE FRAME DATA is available.
The DTC is stored in the PCM memory.

POSSIBLE CAUSE

Short to power circuit between generator connector terminal D and PCM connector terminal 2AI
Generator malfunction
PCM and/or generator are poorly connected

Courtesy of MAZDA MOTORS CORP.