Checking the ground lead

Connect an ohmmeter between the intake air temperature (IAT) sensor connector terminal #2 (control module side) and ground.

Fig 1: Identifying Intake Air Temperature (IAT) Sensor Connector Terminals

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Ohmmeter

Courtesy of VOLVO CARS OF NORTH AMERICA.

The ohmmeter should read approximately 0 Ω. 

• OK 

  Refer to Checking the signal cable 

• NOT OK 

  Refer to Checking wiring and terminals