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DTC P2504

id010200814200

DTC P2504 | Battery overcharge
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DETECTION CONDITION | • The PCM determines that generator output voltage is 18.5 V or more and the battery voltage is 16.0 V or less while the engine is running.
POSSIBLE CAUSE | • Short to power circuit between generator connector terminal D and PCM connector terminal 2AN • Generator malfunction • PCM and/or generator are improperly connected.

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | PERFORM DTC CONFIRMATION PROCEDURE • Perform the DTC CONFIRMATION PROCEDURE. (See DTC CONFIRMATION PROCEDURE.) • Is the same DTC present? | Yes | Go to the next step.
No | Intermittent concern exists. Go to the INTERMITTENT CONCERN TROUBLESHOOTING procedure. (See INTERMITTENT CONCERN TROUBLESHOOTING.)
2 | INSPECT GENERATOR FOR POOR CONNECTION • Turn the ignition switch off. • Disconnect the generator connector. • Inspect for poor connection (such as damaged, pulled-out pins, and corrosion). • Is there any malfunction? | Yes | Repair or replace 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 PCM FOR POOR CONNECTION • Turn the ignition switch off. • Disconnect the PCM connector. • Inspect for poor connection (such as damaged, pulled-out pins, and 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, 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 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 PCM memory using WDS or equivalent. • Perform the KOER self-test. (See KOEO/KOER SELF-TEST.) • Is the same DTC present? | Yes | Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION.)
No | Go to the next step.
8 | VERIFY AFTER REPAIR PROCEDURE • Perform the "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE.) • Are any DTCs present? | Yes | Go to the applicable DTC troubleshooting. (See DTC TABLE.)
No | Troubleshooting completed.