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STEP
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INSPECTION
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ACTION
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1
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VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has 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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INSPECT VARIABLE INTAKE-AIR SHUTTER VALVE ACTUATOR CONNECTOR FOR POOR CONNECTION
• Turn the ignition switch off.
• Disconnect the variable intake-air shutter valve actuator connector.
• Inspect for poor connection (such as damaged/pulled-out pins, and corrosion).
• Is there any malfunction?
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Yes
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Repair or replace the terminal, 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 VARIABLE INTAKE-AIR SHUTTER VALVE ACTUATOR CIRCUIT FOR SHORT TO POWER SUPPLY
• Turn the ignition switch to the ON position (Engine off).
• Measure the voltage between the following circuits:
- – Variable intake-air shutter valve actuator terminal A (wiring harness-side) and body GND
- – Variable intake-air shutter valve actuator terminal B (wiring harness-side) and body GND
• 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 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 VARIABLE INTAKE-AIR SHUTTER VALVE ACTUATOR CIRCUIT FOR SHORT TO GND
• Turn the ignition switch off.
• Inspect for continuity between the following circuits:
- – Variable intake-air shutter valve actuator terminal A (wiring harness-side) and body GND
- – Variable intake-air shutter valve actuator terminal B (wiring harness-side) and body GND
• Is there continuity?
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Yes
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Repair or replace the wiring harness for a possible short to GND, 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 VARIABLE INTAKE-AIR SHUTTER VALVE ACTUATOR
• Inspect the variable intake-air shutter valve actuator.
• Is there any malfunction?
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Yes
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Replace the variable intake-air shutter valve actuator, 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 PCM CONNECTOR FOR POOR CONNECTION
• Turn the ignition switch off.
• Disconnect the PCM connector.
• Inspect for poor connection (such as damaged/pulled-out pins, and corrosion).
• Is there any malfunction?
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Yes
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Repair or replace the terminal, then go to Step 9.
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No
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Go to the next step.
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8
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INSPECT VARIABLE INTAKE-AIR SHUTTER VALVE ACTUATOR CIRCUIT FOR OPEN CIRCUIT
• Turn the ignition switch off.
• Inspect for continuity between the following circuits:
- – Variable intake-air shutter valve actuator terminal A (wiring harness-side) and PCM terminal 2AO (wiring harness-side)
- – Variable intake-air shutter valve actuator terminal B (wiring harness-side) and PCM terminal 2AS (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 the wiring harness for a possible open circuit, then go to the next step.
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9
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VERIFY TROUBLESHOOTING OF DTC P0660 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the WDS or equivalent.
• Start the engine.
• Access the RPM PID.
• Increase the engine speed 4,100 rpm or more.
• 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”.
• Are any DTCs present?
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Yes
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Go to the applicable DTC troubleshooting.
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No
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Troubleshooting completed.
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