Diagnostic procedure
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STEP
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INSPECTION
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ACTION
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1
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PERFORM DTC CONFIRMATION PROCEDURE
• Perform 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 INTERMITTENT CONCERN TROUBLESHOOTING procedure.
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2
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INSPECT DRIVE BELT CONDITION
• Verify that the drive belt auto tensioner indicator mark does not exceed limit.
• Is the front drive belt normal?
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Yes
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Go to the next step.
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No
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Replace and/or adjust the drive belt, then go to Step 9.
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3
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INSPECT POOR CONNECTION OF PCM CONNECTOR
• Turn the ignition switch off.
• Disconnect the PCM connector.
• Inspect for poor connection (such as damaged/pulled-out terminals, corrosion).
• Is there any malfunction?
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Yes
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Repair the terminals, then go to Step 9.
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No
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Go to the next step.
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4
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INSPECT POOR CONNECTION OF GENERATOR CONNECTOR
• Disconnect generator connector.
• Inspect for poor connection (such as damaged/pulled-out terminals, corrosion).
• Is there any malfunction?
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Yes
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Repair or replace the terminals, then go to Step 9.
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No
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Go to the next step.
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5
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INSPECT GENERATOR CONTROL CIRCUIT FOR SHORT TO GROUND
• Inspect for continuity between generator terminal D (wiring harness-side) and body ground.
• Is there continuity?
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Yes
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Repair or replace the wiring harness for short to ground, then go to Step 9.
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No
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Go to the next step.
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6
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INSPECT GENERATOR OUTPUT VOLTAGE MONITOR CIRCUIT FOR SHORT TO GROUND
• Inspect for continuity between generator terminal P (wiring harness-side) and body ground.
• Is there continuity?
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Yes
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Repair or replace the wiring harness for short to ground, then go to Step 9.
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No
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Go to the next step.
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7
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INSPECT GENERATOR CONTROL CIRCUIT FOR OPEN
• Measure the resistance between generator terminal D (wiring harness-side) and PCM terminal 1AD (wiring harness-side).
• Is there continuity?
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Yes
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Go to the next step.
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No
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Repair or replace wiring harness for open circuit, then go to Step 9.
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8
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INSPECT GENERATOR OUTPUT VOLTAGE MONITOR CIRCUIT FOR OPEN CIRCUIT
• Measure the resistance between generator terminal P (wiring harness-side) and PCM terminal 1AA (wiring harness-side).
• Is there continuity?
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Yes
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Repair or replace the generator, then go to the next step.
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No
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Repair or replace the wiring harness for open circuit, then go to the next step.
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9
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VERIFY TROUBLESHOOTING OF DTC P2503 COMPLETED
• Make sure to reconnect all connectors.
• Clear the DTC from the PCM memory using the WDS or equivalent.
• Perform 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.
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No
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Go to the next step.
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10
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VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
(See AFTER REPAIR PROCEDURE [L3].)
• Is there any DTC present?
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Yes
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Go to the applicable DTC inspection.
(See DTC TABLE [L3].)
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No
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Troubleshooting completed.
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