DTC P2502 [L3]

BME010202500201

DTC P2502

Generator terminal B circuit open

DETECTION CONDITION

• The 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

1
PERFORM DTC CONFIRMATION PROCEDURE
• Perform DTC CONFIRMATION PROCEDURE.
• Is same DTC present?
Yes
Go to the next step.
No
Intermittent concern exists. Go to INTERMITTENT CONCERN TROUBLESHOOTING procedure.
2
INSPECT BATTERY
• Turn the ignition switch off.
• Inspect the battery.
• Is the battery normal?
Yes
Replace the battery, then go to Step 6.
No
Go to the next step.
3
INSPECT POOR INSTALLATION OF GENERATOR TERMINAL
• Turn the ignition switch 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 the 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 the next step.
5
INSPECT BATTERY CHARGING CIRCUIT
• Start the engine.
• Disconnect battery positive terminal.
• Does the engine stall?
Yes
Repair or replace the wiring harness between generator terminal B and battery positive terminal, then go to the next step.
No
Go to the next step.
6
VERIFY TROUBLESHOOTING OF DTC P2502 COMPLETED
• Make sure to reconnect all connectors.
• Clear the DTC from the PCM memory using the WDS or equivalent.
• Perform KOER self-test.
• Is the same DTC present?
Yes
Replace the PCM, then go to the next step.
No
Go to the next step.
7
VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
• Is there any DTC present?
Yes
Go to the applicable DTC inspection.
No
Troubleshooting completed.