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Diagnostic procedure

WARNING: This page is about a different car, the 2005 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
DTC P2502 [L3] 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 DATA on repair order, then go to the next step.
2 VERIFY RELATED REPAIR INFORMATION AVAILABILITY 
  • Check for related Service Bulletins and/or online 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, then go to the next step.
No Go to the next step.
3 INSPECT BATTERY 
  • Turn the ignition switch off.
  • Inspect battery.
  • Is battery normal?
 Yes Replace battery, then go to Step 7.
No Go to the next step.
4 INSPECT POOR INSTALLATION OF GENERATOR TERMINAL 
  • Turn the ignition switch off.
  • Inspect generator terminal B installation nut for looseness.
  • Is nut loose?
 Yes Tighten 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 battery positive terminal for looseness.
  • 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 connectors.
  • Clear the DTC from the memory using the WDS or equivalent.
  • Turn ignition switch to OFF, then start engine.
  • Is same DTC present?
 Yes Replace PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION .)
No Go to the next step.
8 VERIFY AFTER REPAIR PROCEDURE 
 Yes Go to the applicable DTC inspection.
(See DTC TABLE .)
No Troubleshooting completed.
(1) California emission regulation applicable ATX model
(2) Except for California emission regulation applicable ATX model
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