Diagnostic Procedure
- If FREEZE FRAME DATA has been recorded, go to next step. If FREEZE FRAME DATA has not been recorded, record FREEZE FRAME DATA. Go to next step.
- Verify Related Repair Information Availability -
Check for related Service Bulletins and/or on-line repair information availability. If any related repair information is available, perform repair or diagnosis according to available repair information. If vehicle is not repaired, go to next step. If related repair information is not available, go to next step.
- Inspect Battery -
Turn ignition off. Inspect battery. If battery is okay, go to next step. If battery is faulty, replace battery. After repair, go to step 7.
- Inspect Poor Installation Of Generator Terminal -
Turn ignition off. Check for looseness of generator terminal "B" installation nut. See Fig 1. If installation nut is not loose, go to next step. If installation nut is loose, tighten generator terminal "B" installation nut. After repair, go to step 7.
Courtesy of MAZDA MOTORS CORP.
- Inspect Poor Installation Of Positive Battery Terminal -
Check for looseness of positive battery terminal. If positive battery terminal is not loose, go to next step. If terminal is loose, connect positive battery terminal correctly. After repair, go to step 7.
- Inspect Battery Charging Circuit -
Start engine. Disconnect positive battery terminal. If engine does not stall, go to next step. If engine stalls, repair or replace wire harness between generator terminal "B" (Black/White wires) and positive battery terminal (Black/Red wire). See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. After repair, go to next step.
- Verify Trouble Shooting Of DTC P2502 Is Completed -
Make sure to reconnect all disconnected connectors. Clear DTC from PCM memory using WDS or equivalent. Turn ignition off. Start engine and warm up completely. If same DTC is not present, go to next step. If same DTC is present, replace PCM. For PCM removal and installation, see POWERTRAIN CONTROL MODULE
under COMPUTERIZED ENGINE CONTROLS in REMOVAL & INSTALLATION article. After repair, go to next step.
- Verify After Repair Procedure -
Using scan tool, perform After Repair Procedure. See AFTER REPAIR PROCEDURE . If any DTCs are present, go to appropriate DTC inspection. Refer to DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no DTCs are present, trouble shooting is complete.