| P024A | Persistent Air bypass valve governor deviation |
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DETECTION CONDITION
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• The PCM monitors the air bypass valve position using the air bypass valve position sensor. If the actual air bypass valve position offset difference with target value is more than threshold. The PCM determines that the air bypass valve governor deviation is below or above limit.
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POSSIBLE CAUSE
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• Air bypass valve malfunction
• Contaminate in air bypass valve
• Connector or terminal malfunction
• Air bypass valve position sensor malfunction
• Vent or damaged in wiring between air bypass valve and PCM
• PCM malfunction
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Diagnostic procedure
| STEP | INSPECTION | 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 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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IDENTIFY TRIGGER DTC FOR FREEZE FRAME DATA
• Is P024A on FREEZE FRAME DATA?
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Yes
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Go to the next step.
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No
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Go to troubleshooting procedures for DTC in FREEZE FRAME DATA.
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4
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INSPECT AIR BYPASS VALVE CONNECTOR FOR POOR CONNECTION
• Turn the engine switch off.
• Disconnect air bypass valve 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 8.
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No
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Go to the next step.
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5
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INSPECT THE WIRING HARNESS FOR VENT AND/OR DAMAGE
• Inspect for vent and/or damaged in the wiring harness between air bypass valve and PCM.
• Is there any malfunction?
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Yes
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Repair or replace malfunctioning part, then go to Step 8.
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No
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Go to the next step.
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6
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INSPECT OPERATION OF AIR BYPASS VALVE
• Remove the air bypass valve with connector connected.
• Connect the M-MDS to DLC-2.
• Turn the engine switch to the ON position (Engine off).
• Access CABVPPID.
• Visually inspect the air bypass valve operation using the CABVP PID of simulation function.
• Does the air bypass valve move smoothly?
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Yes
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Go to Step 8.
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No
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Clean the air bypass valve, then go to the next step.
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7
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INSPECT AIR BYPASS VALVE
• Inspect the air bypass valve.
• Is the air bypass valve 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 the air pipe (air bypass valve and Intake throttle valve component), then go to the next step.
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8
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VERIFY THAT DTC P024A TROUBLESHOOTING IS COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PCM memory using the M-MDS.
• Start the engine and warm-up to normal operating temperature.
• Run the vehicle under the FREEZE FRAME DATA stored condition.
• Retrieve the DTC using the M-MDS.
• Is the PENDING CODE same DTC present?
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Yes
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Replace 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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9
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VERIFY AFTER REPAIR PROCEDURE
• Perform “After Repair Procedure”.
• Is there any DTC 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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Troubleshooting completed.
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