Checking the component and wiring

HINT: To avoid injury, disconnect the power supply to the engine cooling fan (FC) during fault-tracing. 

Check the resistance of the engine coolant temperature (ECT) sensor. Take readings between terminals #1 and #2 on the engine coolant temperature (ECT) sensor.

Check the signal cable. Check for a short-circuit to ground.

Take readings between:

• Engine Control Module (ECM) #A42 (#A42) and engine temperature sensor #1.

Remedy as necessary.

Other information: 

• See Connecting the breakout box
• See Signal specification
• See Component specifications
• See Thermostat / temperature sensor, engine coolant, replacing
• See Checking wiring and terminals

Fig 1: Identifying 2-Bit Connector

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 (ECT) Sensor

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Continue 

  Refer to Verification