Checking the ground lead

Connect an ohmmeter between atmospheric pressure sensor connector terminal 2 (engine control module (ECM) side) and ground.

Fig 1: Identifying Atmospheric Pressure 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 Defective atmospheric pressure sensor 

• NOT OK 

  Refer to Checking the ground lead 

Check the cable between atmospheric pressure sensor connector terminal 2 (control module side) and engine control module (ECM) terminal 77 for an open-circuit according to Open-circuit, permanent faults .

Remedy as necessary.

Fig 1: Identifying Atmospheric Pressure Sensor Connector Terminals

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Ohmmeter

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Continue 

  Refer to Verification