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1
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VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has the FREEZE FRAME DATA been recorded?
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Yes
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Go to the next step.
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No
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Record the FREEZE FRAME DATA on the repair order, then go to the next step.
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2
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VERIFY RELATED REPAIR INFORMATION AVAILABILITY
• Verify related service repair information availability.
• Is any related repair information available?
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Yes
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Perform repair or diagnosis according to the available repair information.
• If the vehicle is not repaired, go to the next step.
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No
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Go to the next step.
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3
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VERIFY RELATED PENDING CODE AND/OR DTC
• Switch the ignition to ON (engine off).
• Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure.
• Is the other PENDING CODE/DTC also present?
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Yes
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Go to the applicable DTC inspection.
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No
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Go to the next step.
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4
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INSPECT EGR VALVE ACTUATOR CONNECTOR CONDITION
• Switch the ignition to OFF.
• Disconnect the EGR valve actuator connector.
• Inspect for poor connection (such as damaged/pulled-out pins, corrosion)
• Is there any malfunction?
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Yes
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Repair or replace the connector and/or terminals, then go to Step 10.
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No
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Go to the next step.
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5
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INSPECT EGR VALVE ACTUATOR CIRCUIT FOR SHORT TO POWER SUPPLY
• Disconnect the EGR valve actuator connector.
• Switch the ignition to ON (engine off).
• Measure the voltage at the following terminals (wiring harness-side):
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― EGR valve actuator terminal C
― EGR valve actuator terminal D
• Is the voltage B+?
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Yes
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Repair or replace the wiring harness for a possible short to power supply, then go to Step 10.
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No
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Go to the next step.
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6
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INSPECT EGR VALVE ACTUATOR CIRCUIT FOR SHORT TO GROUND
• Switch the ignition to OFF.
• Disconnect the EGR valve actuator connector.
• Inspect for continuity between EGR valve actuator and body ground at following wiring harness-side connector:
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― EGR valve actuator terminal C
― EGR valve actuator terminal D
• Is there continuity?
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Yes
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Repair or replace the wiring harness for a possible short to ground, then go to Step 10.
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No
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Go to the next step.
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7
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INSPECT EGR VALVE ACTUATOR
• Inspect the EGR valve actuator.
• Is there any malfunction?
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Yes
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Replace the EGR valve, then go to Step 10.
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No
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Go to the next step.
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8
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INSPECT PCM CONNECTOR FOR POOR CONNECTION
• Disconnect the PCM connector.
• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
• Is there any malfunction?
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Yes
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Repair or replace the terminal, then go to Step 10.
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No
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Go to the next step.
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9
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INSPECT EGR VALVE ACTUATOR CIRCUIT FOR OPEN
• Inspect for continuity between EGR valve actuator and PCM at following wiring harness-side connector:
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― EGR valve actuator terminal C and PCM terminal 227
― EGR valve actuator D and PCM terminal 228
• 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 the wiring harness for a possible open circuit, go to the next step.
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10
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VERIFY THAT DTC P0403 TROUBLESHOOTING IS COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the M-MDS.
• Run the vehicle under the FREEZE FRAME DATA stored condition.
• Is the same DTC present?
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Yes
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Repeat the inspection from Step 1.
• If the malfunction recurs, replace the PCM.
Go to the next step.
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No
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Go to the next step.
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11
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VERIFY AFTER REPAIR PROCEDURE
• Perform the after repair procedure.
• Are any DTCs present?
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Yes
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Go to the applicable DTC inspection.
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No
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DTC troubleshooting completed.
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