Checking the component and wiring

Check the signal cable between engine control module (ECM) terminal #A40 (#A40) and engine coolant temperature (ECT) sensor terminal #1. Check for an open-circuit. Check for a short-circuit to ground.

Check the ground lead between engine control module (ECM) terminal #A61 (#B3) and engine coolant temperature (ECT) sensor terminal #2. Check for an open-circuit.

Remedy as necessary.

Other information 

• See connecting the breakout box
• See Signal specification
• See engine coolant temperature (ECT) sensor, replacing
• See Contents

Fig 1: Identifying Terminal connectors

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying VCT2000 Diagnostic Tool

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying engine Coolant Temperature Sensor

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Continue 

  Refer to Verification