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DTC P2502 [AJ]

BME010202500W04

DTC P2502 | Generator terminal B circuit open
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DETECTION CONDITION | • The PCM determines that the generator output voltage is 17 V or above, or the battery voltage is 11 V or below when the engine is running. Diagnostic support note • This is a continuous monitor (other). • The MIL illuminates if the PCM detects the above malfunction condition in the first drive cycle.
• PENDING CODE is available if the PCM detects the above malfunction condition.
• FREEZE FRAME DATA is not available.
• DTC is stored in PCM memory.
POSSIBLE CAUSE | • Open circuit between generator terminal B and the battery positive terminal • Battery malfunction • PCM malfunction

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 FREEZE FRAME PID DATA on repair order, then go to the next step.
2 | VERIFY RELATED REPAIR INFORMATION AVAILABILITY • Check for related Service Information and/or on-line 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 off. • Inspect battery. (See BATTERY INSPECTION.) • Is there any malfunction? | Yes | Replace battery, then go to Step 7. (See BATTERY REMOVAL/INSTALLATION [L3, AJ].)
No | Go to the next step.
4 | INSPECT GENERATOR TERMINAL FOR POOR INSTALLATION • Turn the ignition switch off. • Check for looseness of generator terminal B installation nut. • Is nut loose? | Yes | Tighten generator terminal B installation nut, then go to Step 7.
No | Go to the next step.
5 | INSPECT BATTERY POSITIVE TERMINAL FOR POOR INSTALLATION • Turn the ignition switch off. • Check for looseness of battery positive terminal. • Is terminal loose? | Yes | Connect battery positive terminal correctly, then go to Step 7.
No | Go to the next step.
6 | 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 the next step.
No | Go to the next step.
7 | VERIFY TROUBLESHOOTING OF DTC P2502 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the memory using the WDS or equivalent. • Turn key to OFF, then start engine. • Is same DTC present? | Yes | Replace PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [AJ].)
No | Go to the next step.
8 | VERIFY AFTER REPAIR PROCEDURE • Perform "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE [AJ].) • Are any DTCs present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [AJ] (VIN: JM0 LW10J300 301406-, JMZ LW69J7*# 307683-, JM8 LW28J**# 301514-, JM8 LW28A**# 301514- (Assumed)).)
No | Troubleshooting completed.