DTC P2504 [AJ]

BME010202500W02

DTC P2504

Battery overcharge

DETECTION CONDITION

• The PCM determines that the generator output voltage is 18.5 V or above, or the battery voltage is 16.0 V or above when the engine is running.
Diagnostic support note
• This is a continuous monitor (other).
• The MIL illuminates if the PCM detects the above malfunction condition in the first drive cycle.
• 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
• Connector or terminal malfunction
• Short to power circuit between generator connector terminal D and PCM terminal 36
• PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has FREEZE FRAME DATA been recorded?
Yes
Go to next step.
No
Record FREEZE FRAME DATA on repair order, then go to next step.
2
VERIFY RELATED REPAIR INFORMATION AVAILABILITY
• Check for related Service Information and/or on-line repair information availability.
• Is any related repair information available?
Yes
Perform repair or diagnosis according to available repair information.
• If vehicle is not repaired, go to next step.
No
Go to next step.
3
INSPECT GENERATOR CONNECTOR FOR POOR CONNECTION
• Turn the ignition switch off.
• Disconnect generator connector.
• Check for poor connection (such as damaged, pulled-out pins, and corrosion).
• Is there any malfunction?
Yes
Repair or replace terminal, then go to Step 8.
No
Go to next step.
4
CLASSIFY GENERATOR MALFUNCTION OR OTHER MALFUNCTION
• Turn the ignition switch to ON (Engine OFF).
• Measure voltage between generator terminal D (harness-side) and body GND.
• Is voltage B+?
Yes
Go to next step.
No
Malfunction at the generator.
Go to step 7.
5
INSPECT PCM CONNECTOR FOR POOR CONNECTION
• Turn the ignition switch off.
• Disconnect PCM connector.
• Check for poor connection (such as damaged, pulled-out pins, and corrosion).
• Is there any malfunction?
Yes
Repair or replace terminal, then go to Step 8.
No
Go to next step.
6
INSPECT GENERATOR CONTROL CIRCUIT FOR SHORT TO POWER
• Turn the ignition switch to ON (Engine OFF).
• Measure voltage between generator terminal D (harness-side) and body GND.
• Is voltage B+?
Yes
Repair or replace harness for short to power, then go to Step 8.
No
Go to step 8.
7
INSPECT GENERATOR CONTROL TERMINAL FOR SHORT TO POWER
• Turn the ignition switch to ON (Engine OFF).
• Measure voltage between generator terminal D (part-side) and body GND.
• Is voltage B+?
Yes
Replace generator, then go to next step.
No
Go to next step.
8
VERIFY TROUBLESHOOTING OF DTC P2504 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear DTC from memory using WDS equivalent.
• Turn the ignition switch to OFF, then start engine.
• Is same DTC present?
Yes
Replace PCM, then go to next step.
No
Go to next step.
9
VERIFY AFTER REPAIR PROCEDURE
• Perform "AFTER REPAIR PROCEDURE".
• Are any DTCs present?
Yes
Go to applicable DTC inspection.
No
Troubleshooting completed.