DTC P2504 [L3]

BME010202500203

DTC P2504

Battery overcharge

DETECTION CONDITION

• The PCM judges generator output voltage is above 18.5 V or battery voltage is above 16.0 V when the engine is running.

POSSIBLE CAUSE

• Short to power circuit between generator connector terminal D and PCM connector terminal 1AD
• Generator malfunction
• PCM and/or generator are poorly connected.

Diagnostic procedure

STEP

INSPECTION

ACTION

1
PERFORM DTC CONFIRMATION PROCEDURE
• Perform DTC CONFIRMATION PROCEDURE.
• Is same DTC present?
Yes
Go to the next step.
No
Intermittent concern exists. Go to INTERMITTENT CONCERN TROUBLESHOOTING procedure.
2
INSPECT POOR CONNECTION OF GENERATOR CONNECTOR
• Turn the ignition switch off.
• Disconnect generator connector.
• Inspect for poor connection (such as damaged/pulled-out terminals, corrosion).
• Is there any malfunction?
Yes
Repair or replace the terminals, then go to Step 7.
No
Go to the next step.
3
CLASSIFY GENERATOR MALFUNCTION OR OTHER MALFUNCTION
• Turn the ignition switch to the ON position (Engine off).
• Measure the voltage between generator terminal D (wiring harness-side) and body ground.
• Is the voltage B+?
Yes
Go to the next step.
No
Malfunction at generator.
Go to Step 6.
4
INSPECT POOR CONNECTION OF PCM CONNECTOR
• Turn the ignition switch off.
• Disconnect the PCM connector.
• Inspect for poor connection (such as damaged/pulled-out terminals, corrosion).
• Is there any malfunction?
Yes
Repair or replace the pins, then go to Step 7.
No
Go to the next step.
5
INSPECT GENERATOR CONTROL CIRCUIT FOR SHORT TO POWER
• Turn the ignition switch to the ON position (Engine off).
• Measure the voltage between generator terminal D (wiring harness-side) and body ground.
• Is the voltage B+?
Yes
Repair or replace the wiring harness for short to power supply, then go to Step 7.
No
Go to Step 7.
6
INSPECT GENERATOR CONTROL TERMINAL FOR SHORT TO POWER
• Measure the voltage between generator terminal D (part-side) and body ground.
• Is the voltage B+?
Yes
Repair or replace the generator, then go to Step 7.
No
Go to the next step.
7
VERIFY TROUBLESHOOTING OF DTC P2504 COMPLETED
• Make sure to reconnect all connectors.
• Clear the DTC from the PCM memory using the WDS or equivalent.
• Perform KOER self-test.
• Is the same DTC present?
Yes
Replace the PCM, then go to the next step.
No
Go to the next step.
8
VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
• Is there any DTC present?
Yes
Go to the applicable DTC inspection.
No
Troubleshooting completed.