Checking the wiring

Check the cable between engine control module (ECM) terminal #A22 (#A22) and mass air flow (MAF) sensor terminal #5. Check for a short-circuit to supply voltage.

Check the ground lead between terminal #A58 (#A58) and mass air flow (MAF) sensor terminal #3. Check for an open-circuit.

With the ignition on and the mass air flow (MAF) sensor connector disconnected, the voltage at mass air flow (MAF) terminal #2 must be approximately U_bat , at mass air flow (MAF) terminal #3 it must be ground and at terminal #5 approximately 1 V.

Remedy as necessary

Other information: 

• See Short-circuit to supply voltage. Permanent faults
• See Connecting the breakout box
• See Mass air flow sensor (MAF), replacing
• For information about signals, see ELECTRICAL SYSTEM

Fig 1: Identifying Connector

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Mass Air Flow (MAF) Sensor

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Continue 

  Refer to Verification