| Mazda P2142 | Intake throttle valve actuator circuit high |
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DETECTION CONDITION
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• The PCM monitors that the intake throttle valve actuator control circuit voltage at the PCM terminal 247. If the PCM terminal 247 voltage is above threshold when the intake throttle valve actuator operation condition. The PCM determines that intake throttle circuit is high.
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POSSIBLE CAUSE
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• Intake throttle valve actuator malfunction
• Connector or terminal malfunction
• Short to power circuit in wiring between intake throttle valve actuator terminal C and PCM terminal 247
• 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 DTC P2142 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 PCM AND INTAKE THROTTLE VALVE ACTUATOR CONNECTORS FOR POOR CONNECTION
• Turn the engine switch off.
• Disconnect the PCM and intake throttle valve actuator connectors.
• Inspect poor connection (such as damaged, pulled-out terminals, corrosion, etc.).
• Is there any malfunction?
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Yes
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Repair or replace terminal, then go to Step 7.
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No
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Go to the next step.
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5
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INSPECT INTAKE THROTTLE VALVE ACTUATOR CONTROL CIRCUIT FOR SHORT TO GROUND
• Inspect the continuity between intake throttle valve actuator terminal C (harness-side) and body ground.
• Is there any continuity?
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Yes
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Repair or replace harness for short to ground, then go to Step 7.
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No
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Go to the next step.
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6
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INSPECT INTAKE THROTTLE VALVE ACTUATOR
• Inspect the intake throttle valve actuator.
• Is the intake throttle valve actuator 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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7
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VERIFY THAT DTC P2142 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.
• 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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8
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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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