DTC P2502 [AJ]

BME010202500W04

DTC P2502

Generator terminal B circuit open

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

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.
• Is there any malfunction?
Yes
Replace battery, then go to Step 7.
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.
No
Go to the next step.
8
VERIFY AFTER REPAIR PROCEDURE
• Perform "AFTER REPAIR PROCEDURE".
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
No
Troubleshooting completed.