DTC P0638:00 [MZR 1.6]
id0102h3706100
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DTC P0638:00 |
Throttle valve actuator control circuit range/performance problem |
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DETECTION CONDITION
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• The PCM compares the actual TP with the target TP when the engine is running. If the difference is more than the specification, the PCM determines that there is a throttle valve actuator control circuit range/performance problem.
Diagnostic support note
• This is a continuous monitor (CCM).
• The check engine light illuminates if the PCM detects the above malfunction condition in the first drive cycle.
• FREEZE FRAME DATA (Mode 2)/Snapshot data is available.
• DTC is stored in the PCM memory.
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POSSIBLE CAUSE
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• Throttle valve actuator malfunction
• Throttle valve malfunction
• PCM malfunction
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Diagnostic Procedure
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STEP |
INSPECTION |
ACTION |
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1
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VERIFY FREEZE FRAME DATA (MODE 2)/SNAPSHOT DATA HAS BEEN RECORDED
• Has the FREEZE FRAME DATA (Mode 2)/snapshot 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 (Mode 2)/snapshot data on 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 Information availability.
• Is any related Service Information available?
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Yes
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Perform repair or diagnosis according to the available Service 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 STORED DTC
• Switch the ignition off, then ON (engine off).
• Verify the related PENDING CODE and stored DTCs using the M-MDS.
• Are any other DTCs present?
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Yes
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Go to the applicable DTC inspection.
(See DTC TABLE [MZR 1.6].)
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No
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Go to the next step.
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4
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INSPECT THROTTLE VALVE ACTUATOR
• Inspect the throttle valve actuator.
• Is there any malfunction?
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Yes
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Replace the throttle body, 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 THROTTLE VALVE
• Inspect the throttle valve.
• Is there any malfunction?
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Yes
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Replace the throttle body, 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 DTC TROUBLESHOOTING COMPLETED
• Always reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the M-MDS.
• Start the engine.
• Perform the DTC Reading Procedure.
• 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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7
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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.
(See DTC TABLE [MZR 1.6].)
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No
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DTC troubleshooting completed.
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