Checking the connector

Fig 1: Identifying Ignition Switch ON Position

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Fig 2: Identifying Connector(s) Reinstallation

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• Ignition off
• Check the intake air temperature (IAT) sensor connector. Check for contact resistance and oxidation
• Reinstall the components, reconnect the connectors etc.
• Ignition on
• Read off the signal from the intake air temperature (IAT) sensor.

  Check that the signal is within its permitted range. The voltage may vary between 0.17 V and 4.9 V depending on the air temperature. At 20° C voltage should be approximately 3.5 V.

  If the signal is now OK, the fault was caused by poor contact in the connector.

  Other information 

  • To access or replace the intake air temperature (IAT) sensor, see Temperature and pressure sensor, replacing
  • See Contents .
  Fig 3: Identifying Camshaft Reset Valve Connector Terminals

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  Fig 4: Identifying VCT2000 Diagnostic Tool

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  Fig 5: Identifying Temperature Sensor - Intake (Turbocharged Engines Only, 2002-2004)

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Is the signal OK? 

• YES 

  OKAY:  Troubleshooting has been completed.

• NO 

  Refer to Checking the wiring and component