DTC P2502 [LF]

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DTC P2502 [LF]

B3E010201083W03

DTC P2502 | Charging system voltage problem
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DETECTION CONDITION | • PCM judges generator output voltage is above 17 V or battery voltage is below 11 V during engine running.
POSSIBLE CAUSE | • Open circuit between generator terminal B and battery positive terminal • Battery malfunction • Generator malfunction • PCM is poorly connected • PCM, generator and/or battery are poorly connected

Diagnostic procedure

STEP | INSPECTION | ACTION
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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 BATTERY • Turn the ignition switch to off. • Inspect battery. • Is battery normal? | Yes | Go to the next step.
No | Replace battery, then go to Step 7.
4 | INSPECT POOR INSTALLATION OF GENERATOR TERMINAL • Turn the ignition switch to off. • Inspect for looseness of generator terminal B installation nut. • Is the nut loose? | Yes | Tighten generator terminal B installation nut, then go to Step 7.
No | Go to the next step.
5 | INSPECT POOR INSTALLATION OF BATTERY POSITIVE TERMINAL • Inspect for looseness of battery positive terminal. • Is the terminal loose? | Yes | Connect battery positive terminal correctly, then go to Step 7.
No | Go to the next step.
6 | INSPECT BATTERY CHARGING CIRCUIT • Disconnect the generator terminal B. • Measure the voltage between the generator terminal B (wiring harness-side) and the body ground. • Is the voltage B+? | Yes | Go to the next step.
No | Repair or replace wiring harness between the generator terminal B and the battery positive terminal, then go to the next step.
7 | VERIFY TROUBLESHOOTING OF DTC P2502 COMPLETED • Make sure to reconnect all connectors. • Clear DTC from memory using WDS or equivalent. • 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.
8 | 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.