DTC P2502 [ZJ, Z6]

#
DTC P2502 [ZJ, Z6]

B3E010202500W01

DTC P2502 | Charging system voltage problem
--- | ---
DETECTION CONDITION | • The PCM determines that the generator output voltage is more than 17 V or the battery voltage is less than 11 V while the engine running.
POSSIBLE CAUSE | • Generator malfunction • Battery malfunction • Connector or terminal malfunction • Open circuit in wiring harness between generator terminal B and battery positive terminal • 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 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 off. • Inspect the battery. (See BATTERY INSPECTION.) • Is the battery normal? | Yes | Go to the next step.
No | Replace the battery, then go to Step 7. (See BATTERY REMOVAL/INSTALLATION [ZJ, Z6].)
4 | INSPECT POOR INSTALLATION OF GENERATOR TERMINAL • Turn the ignition switch off. • Inspect the generator terminal B installation nut for looseness. • Is the nut loose? | Yes | Tighten the 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 the battery positive terminal for looseness. • Is the terminal loose? | Yes | Connect the 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 generator terminal B (wiring harness-side) and body GND. • Is the voltage B+? | Yes | Go to the next step.
No | Repair or replace wiring harness between generator terminal B and 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 the WDS or equivalent. • Start the engine. • Is same DTC present? | Yes | Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [ZJ, Z6].)
No | Go to the next step.
8 | VERIFY AFTER REPAIR PROCEDURE • Perform the "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE [ZJ, Z6].) • Are any DTCs present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [ZJ, Z6].)
No | DTC troubleshooting completed.