DTC P2504 [LF]

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DTC P2504 [LF]

B3E010201083W05

DTC P2504 | Charging system voltage high
--- | ---
DETECTION CONDITION | • PCM judges generator output voltage is above 18.5 V or battery voltage is above 16.0 V during engine running.
POSSIBLE CAUSE | • Short to power circuit between generator connector terminal D and PCM connector terminal 2AQ • Generator malfunction • PCM and/or generator are poorly connected

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has FREEZE FRAME DATA been recorded? | Yes | Go to the next step.
No | Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2 | VERIFY RELATED REPAIR INFORMATION AVAILABILITY • Verify related service repair information availability. • Is any related repair information available? | Yes | Perform repair or diagnosis according to the available repair information. • If the vehicle is not repaired, go to the next step.
No | Go to the next step.

3

INSPECT POOR CONNECTION OF GENERATOR CONNECTOR
• Turn the ignition switch to off.
• Disconnect generator connector.
• Inspect for poor connection
(damaged, pulled-out terminals, corrosion, etc.).
• Is there a malfunction?

Yes

Repair or replace terminals, then go to Step 8.

No | Go to the next step.
4 | CLASSIFY GENERATOR MALFUNCTION OR OTHER MALFUNCTION • Turn the ignition switch to the ON position (Engine off). • Measure 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 7.

5

INSPECT POOR CONNECTION OF PCM CONNECTOR
• Turn the ignition switch to off.
• Disconnect PCM connector.
• Inspect for poor connection
(damaged, pulled-out terminals, corrosion, etc.).
• Is there a malfunction?

Yes

Repair or replace pins, then go to Step 8.

No | Go to the next step.
6 | INSPECT GENERATOR CONTROL CIRCUIT FOR SHORT TO POWER • Turn the ignition switch to the ON position (Engine off). • Measure voltage between generator terminal D (wiring harness-side) and body ground. • Is the voltage B+? | Yes | Repair or replace wiring harness for short to power supply, then go to Step 8.
No | Go to Step 8.
7 | INSPECT GENERATOR CONTROL TERMINAL FOR SHORT TO POWER • Measure voltage between generator terminal D (part-side) and body ground. • Is the voltage B+? | Yes | Repair or replace generator, then go to the next step.
No | Go to the next step.

8

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.
Start the engine.
• Is same DTC present?

Yes

Replace PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [LF].)

No | Go to the next step.
9 | VERIFY AFTER REPAIR PROCEDURE • Perform "After Repair Procedure". (See AFTER REPAIR PROCEDURE [LF].) • Is there any DTC present? | Yes | Go to applicable DTC troubleshooting. (See DTC TABLE [LF].)
No | Troubleshooting completed.