Checking the intake air temperature (IAT) sensor signal

Fig 1: Engine Start Verification

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition on.
• Engine running.
• Read off the intake air temperature (IAT) sensor signal.

  Check that the signal is OK according to the table value:Intake air temperature (IAT) sensor inlet .

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

  Other information: 

  • To access / replace the mass air flow (MAF) sensor, see Replacing the mass air flow (MAF) sensor
  • For information about signals, see Signal specification .
  Fig 2: Identifying VCT2000 Diagnostic Tool

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Is the signal OK? 

• YES 

  Refer to Verification 

• NO 

  Refer to Checking wiring and components