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 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 SERVICE INFORMATION AVAILABILITY
• Verify related Service Bulletins and/or on-line 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 VSS CONNECTOR FOR POOR CONNECTION
• Turn the ignition switch to the LOCK position.
• Disconnect the VSS connector.
• Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
• Is the connection normal?
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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 pin or connector, then go to Step 11.
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4
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INSPECT VSS POWER CIRCUIT FOR OPEN CIRCUIT
• Verify that the VSS connector is disconnected.
• Turn the ignition switch to the ON position (engine off).
• Inspect the voltage between VSS terminal A (wiring harness-side) and ground.
• Is the voltage B+?
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Yes
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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 VSS POWER CIRCUIT FOR SHORT TO GROUND
• Turn the ignition switch to the LOCK position.
• Inspect for continuity between VSS terminal A (wiring harness-side) and ground.
• 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, then go to Step 11.
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6
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INSPECT VSS GROUND CIRCUIT FOR OPEN CIRCUIT
• Verify that the VSS connector is disconnected.
• Inspect for continuity between VSS (wiring harness-side) terminal C and ground.
• 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, then go to Step 11.
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7
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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 the connection normal?
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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 pin or connector, then go to Step 11.
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8
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INSPECT VEHICLE SPEED SIGNAL CIRCUIT FOR OPEN CIRCUIT
• Disconnect the PCM connector and VSS connector.
• Inspect for continuity between VSS terminal B and PCM terminal 1AX.
• 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, then go to Step 11.
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9
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INSPECT VEHICLE SPEED SIGNAL CIRCUIT FOR SHORT TO GROUND
• Verity that the VSS connector and PCM connector are disconnected.
• Inspect for continuity between PCM terminal 1AX and body ground.
• Is there continuity?
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Yes
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Repair or replace the wiring harness, then go to the next step.
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No
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Replace the VSS, then go to the next step.
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10
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INSPECT VEHICLE SPEED SENSOR
• Inspect the VSS.
• Is VSS normal?
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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 VSS, then go to Step 11.
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11
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VERIFY TROUBLESHOOTING OF DTC P0720 COMPLETED
• Make sure to reconnect all the disconnected connectors.
• Clear the DTC from the memory using the WDS or equivalent.
• Warm up engine.
• Drive the vehicle under the following conditions for 4.5 s or more while monitoring PIDs.
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- Engine coolant temp (ECT PID): 60 °C {140 °F} or more
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- Drive in D or M range
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- Frequency of input/turbine speed sensor: 800 Hz or more
• Is the PENDING CODE 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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No concern is detected. Go to the next step.
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12
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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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