DTC P2504 [L3]

BME010202500W03

DTC P2504

Battery overcharge

DETECTION CONDITION

• PCM judges generator output voltage is above 18.5 V or battery voltage is above 16.0 V when 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 next step.
No
Intermittent concern exists. Go to INTERMITTENT CONCERN TROUBLESHOOTING procedure.
2
INSPECT POOR CONNECTION OF GENERATOR CONNECTOR
• Turn ignition key to OFF.
• Disconnect generator connector.
• Check for poor connection
(damaged, pulled-out terminals, corrosion, etc.).
• Is there any malfunction?
Yes
Repair or replace terminals, then go to Step 7.
No
Go to next step.
3
CLASSIFY GENERATOR MALFUNCTION OR OTHER MALFUNCTION
• Turn ignition key to ON (Engine OFF).
• Measure voltage between generator terminal D (harness-side) and body ground.
• Is voltage B+?
Yes
Go to next step.
No
Malfunction at generator.
Go to Step 6.
4
INSPECT POOR CONNECTION OF PCM CONNECTOR
• Turn ignition key to OFF.
• Disconnect PCM connector.
• Check for poor connection
(damaged, pulled-out terminals, corrosion, etc.).
• Is there any malfunction?
Yes
Repair or replace pins, then go to Step 7.
No
Go to next step.
5
INSPECT GENERATOR CONTROL CIRCUIT FOR SHORT TO POWER
• Turn ignition key to ON (engine OFF).
• Measure voltage between generator terminal D (harness-side) and body ground.
• Is voltage B+?
Yes
Repair or replace harness for short to power, then go to Step 7.
No
Go to Step 7.
6
INSPECT GENERATOR CONTROL TERMINAL FOR SHORT TO POWER
• Measure resistance between generator terminal D (part-side) and body ground.
• Is voltage B+?
Yes
Repair or replace generator, then go to Step 7.
No
Go to next step.
7
VERIFY TROUBLESHOOTING OF DTC P2504 COMPLETED
• Make sure to reconnect all connectors.
• Clear DTC from PCM memory using WDS or equivalent.
• Perform KOER self-test.
• Is same DTC present?
Yes
Replace PCM, then go to next step.
No
Go to next step.
8
VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
• Is there any DTC present?
Yes
Go to applicable DTC troubleshooting.
No
Troubleshooting completed.