DTC P2504[LF ATX (FN4A-EL), L3 ATX]

id0102b6814200

DTC P2504

Charging system voltage high

DETECTION CONDITION

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

Diagnostic support note

•  This is a continuous monitor (Other).

•  The MIL does not illuminate.

•  PENDING CODE is available if the PCM detects the above malfunction condition.

•  FREEZE FRAME DATA is not available.

•  The DTC is stored in the PCM memory.

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

DTC P2504	Charging system voltage high
DETECTION CONDITION	• The PCM judges generator output voltage is above 18.5 V or battery voltage is above 16.0 V during engine running. Diagnostic support note • This is a continuous monitor (Other). • The MIL does not illuminate. • PENDING CODE is available if the PCM detects the above malfunction condition. • FREEZE FRAME DATA is not available. • The DTC is stored in the PCM memory.
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.
1		No	Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2	VERIFY RELATED SERVICE INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related Service Information available?	Yes	Perform repair or diagnosis according to the available Service Information. • If the vehicle is not repaired, go to the next step.
2		No	Go to the next step.
3	INSPECT POOR CONNECTION OF GENERATOR CONNECTOR • Turn the ignition switch off. • Disconnect the generator connector. • Inspect for poor connection (damaged/pulled-out terminals, corrosion, etc.). • Is there any malfunction?	Yes	Repair or replace the terminals, then go to Step 8.
3		No	Go to the next step.
4	CLASSIFY GENERATOR MALFUNCTION OR OTHER MALFUNCTION • Turn the ignition switch to the ON (Engine off). • Measure the voltage between generator terminal D and body ground. • Is the voltage B+?	Yes	Go to the next step.
4		No	There is a malfunction at the generator. Go to Step 7.
5	INSPECT POOR CONNECTION OF PCM CONNECTOR • Turn the ignition switch off. • Disconnect the PCM connector. • Inspect for poor connection (damaged/pulled-out terminals, corrosion, etc.). • Is there any malfunction?	Yes	Repair or replace pins, then go to Step 8.
5		No	Go to the next step.
6	INSPECT GENERATOR CONTROL CIRCUIT FOR SHORT TO POWER • Turn the ignition switch to the ON (engine off). • Measure the voltage between generator terminal D and body ground. • Is the voltage B+?	Yes	Repair or replace the wiring harness for short to power supply, then go to Step 8.
6		No	Go to Step 8.
7	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 the next step.
7		No	Go to the next step.
8	VERIFY TROUBLESHOOTING OF DTC P2504 COMPLETED • Make sure to reconnect all connectors. • Clear the DTC from the PCM memory using the M-MDS. • Start the engine, or KOER self‐test with M-MDS. • Is the same DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION[LF, L3].)
8		No	Go to the next step.
9	VERIFY AFTER REPAIR PROCEDURE • Perform “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE[LF ATX (FN4A-EL), L3 ATX].) • Is any DTC present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE[LF ATX (FN4A-EL), L3 ATX].)
9		No	Troubleshooting completed.