Diagnostic procedure
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STEP
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INSPECTION
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ACTION
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|---|---|---|---|
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1
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PERFORM DTC CONFIRMATION PROCEDURE
• Perform the DTC CONFIRMATION PROCEDURE.
(See DTC CONFIRMATION PROCEDURE.)
• Is the same DTC present?
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Yes
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Go to the next step.
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No
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Intermittent concern exists. Go to the INTERMITTENT CONCERN TROUBLESHOOTING procedure.
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2
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INSPECT BATTERY
• Turn the ignition switch off.
• Inspect the battery.
• Is the battery normal?
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Yes
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Replace the battery, then go to Step 6.
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No
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Go to the next step.
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3
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INSPECT GENERATOR TERMINAL FOR POOR INSTALLATION
• Turn the ignition switch off.
• Inspect for looseness of the generator terminal B installation nut.
• Is the nut loose?
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Yes
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Tighten the generator terminal B installation nut, then go to Step 6.
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No
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Go to the next step.
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4
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INSPECT BATTERY POSITIVE TERMINAL FOR POOR INSTALLATION
• Inspect for looseness of the battery positive terminal.
• Is the terminal loose?
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Yes
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Connect the battery positive terminal correctly, then go to Step 6.
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No
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Go to the next step.
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5
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INSPECT BATTERY CHARGING CIRCUIT
• Start the engine.
• Disconnect the battery positive terminal.
• Does the engine stall?
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Yes
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Repair or replace the wiring harness between generator terminal B and the battery positive terminal, then go to the next step.
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No
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Go to the next step.
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6
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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 the KOER self-test.
(See KOEO/KOER SELF-TEST.)
• Is the same DTC present?
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Yes
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Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION.)
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No
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Go to the next step.
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7
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VERIFY AFTER REPAIR PROCEDURE
• Perform the "AFTER REPAIR PROCEDURE".
(See AFTER REPAIR PROCEDURE.)
• Are any DTCs present?
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Yes
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Go to the applicable DTC troubleshooting.
(See DTC TABLE.)
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No
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Troubleshooting completed.
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