Checking The Component And Wiring

Check the connector for the air conditioning (A/C) pressure sensor. Check for contact resistance and oxidation.

Check the signal cable between engine control module (ECM) terminal #B51 (#C51) and air conditioning (A/C) pressure sensor terminal #2. Check for a short-circuit to ground. Check for an open-circuit.

Check the power cable between engine control module (ECM) terminal #B31 (#C31) and air conditioning (A/C) pressure sensor terminal #3. Check for an open-circuit.

HINT: The voltage must be approximately 5 V between air conditioning (A/C) pressure sensor terminal #3 and ground with the ignition switched on. 

Remedy as necessary.

Other information 

• see CONNECTING THE BREAKOUT BOX
• see SIGNAL SPECIFICATION
• see LOCATION OF COMPONENTS, ENGINE COMPARTMENT
• see CONTENTS

Fig 1: Identifying Connector Terminals

Courtesy of VOLVO CARS CORPORATION

Fig 2: Identifying VCT2000 Diagnostic Tool Symbol In VIDA (Volvo Scan Tool)

Courtesy of VOLVO CARS CORPORATION

Fig 3: Identifying Air Conditioning (A/C) Pressure Sensor

Courtesy of VOLVO CARS CORPORATION

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  Refer to VERIFICATION