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DTC P2504 [L3]

BME010202500203

DTC P2504 | Battery overcharge
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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
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1 | PERFORM DTC CONFIRMATION PROCEDURE • Perform DTC CONFIRMATION PROCEDURE. (See DTC CONFIRMATION PROCEDURE [L3].) • Is same DTC present? | Yes | Go to the next step.
No | Intermittent concern exists. Go to INTERMITTENT CONCERN TROUBLESHOOTING procedure. (See INTERMITTENT CONCERN TROUBLESHOOTING [L3].)
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. (See KOEO/KOER SELF-TEST PROCEDURE [L3].)
• Is the same DTC present?
Yes
Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [L3].)
No | Go to the next step.
8 | VERIFY AFTER REPAIR PROCEDURE • Perform "After Repair Procedure". (See AFTER REPAIR PROCEDURE [L3].) • Is there any DTC present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [L3].)
No | Troubleshooting completed.