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DTC P2502 [L3]

BME010202500W01

DTC P2502 | Generator terminal B circuit open
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DETECTION CONDITION | • PCM judges generator output voltage is above 17.0 V or battery voltage is below 11.0 V.
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 | PERFORM DTC CONFIRMATION PROCEDURE • Perform DTC CONFIRMATION PROCEDURE. (See DTC CONFIRMATION PROCEDURE [L3].) • Is same DTC present? | Yes | Go to next step.
No | Intermittent concern exists. Go to INTERMITTENT CONCERN TROUBLESHOOTING procedure. (See INTERMITTENT CONCERN TROUBLESHOOTING [L3].)
2 | INSPECT BATTERY • Turn ignition key to OFF. • Inspect battery. • Is battery okay? | Yes | Replace battery, then go to Step 6.
No | Go to next step.
3 | INSPECT POOR INSTALLATION OF GENERATOR TERMINAL • Turn ignition key to OFF. • Inspect for looseness of generator terminal B installation nut. • Is nut loose? | Yes | Tighten generator terminal B installation nut, then go to Step 6.
No | Go to next step.
4 | INSPECT POOR INSTALLATION OF BATTERY POSITIVE TERMINAL • Inspect for looseness of battery positive terminal. • Is terminal loose? | Yes | Connect battery positive terminal correctly, then go to Step 6.
No | Go to next step.
5 | INSPECT BATTERY CHARGING CIRCUIT • Start engine. • Disconnect battery positive terminal. • Does engine stall? | Yes | Repair or replace harness between generator terminal B and battery positive terminal, then go to next step.
No | Go to next step.
6 | VERIFY TROUBLESHOOTING OF DTC P2502 COMPLETED • Make sure to reconnect all connectors. • Clear DTC from memory using WDS or equivalent. • Perform KOER self-test. (See KOEO/KOER SELF-TEST PROCEDURE [L3].)
• Is the same DTC present?
Yes
Replace PCM, then go to next step.
(See PCM REMOVAL/INSTALLATION [L3].)
No | Go to next step.
7 | VERIFY AFTER REPAIR PROCEDURE • Perform "After Repair Procedure". (See AFTER REPAIR PROCEDURE [L3].) • Is there any DTC present? | Yes | Go to applicable DTC troubleshooting. (See DTC TABLE [L3].)
No | Troubleshooting completed.