Checking component and wiring

Check signal cable between engine control module (ECM) #A68 (#B8) and air conditioning (A/C) pressure sensor #2 for a short-circuit to supply voltage according to Short-circuit to supply voltage. Permanent faults .

Check power supply cable between engine control module (ECM) #A39 (#A39) and air conditioning (A/C) pressure sensor #3 for an open-circuit according to Open-circuit, permanent faults .

Check power supply cable between engine control module (ECM) #A60 (#A60) and air conditioning (A/C) pressure sensor #1 for an open-circuit according to Open-circuit, permanent faults .

Remedy as necessary.

Other information: 

• Connecting the breakout box/accessing the control module, see Connecting the breakout box .
• Air conditioning (A/C) pressure sensor #2 is the signal cable, #3 is the power supply (5V) and #1 is the signal ground.
• For information about signals on 5-cylinder engines, see Signal specification or Signal specification .

Fig 1: Identifying Connector Terminals

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Ohmmeter

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying A/C Pressure Sensor

Courtesy of VOLVO CARS OF NORTH AMERICA.

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  Refer to Verification