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 (Engine Control Module (ECM))
• see SIGNAL SPECIFICATION (Engine Management System)
• see THERMOSTAT / TEMPERATURE SENSOR, ENGINE COOLANT, REPLACING
• see CHECKING WIRING AND TERMINALS

Fig 1: Identifying 2-Bit Connector

Courtesy of VOLVO CARS CORPORATION

Fig 2: Identifying VCT2000 Diagnostic Tool Symbol In VIDA

Courtesy of VOLVO CARS CORPORATION

Fig 3: Identifying Engine Coolant Temperature (ECT) Sensor

Courtesy of VOLVO CARS CORPORATION

• Continue 

  Refer to VERIFICATION