Checking Components And Wiring

Check the resistance of the engine coolant temperature sensor.

Remedy as necessary.

Other information: 

• see SIGNAL SPECIFICATION
• see COMPONENTS RESISTANCE VALUES
• see OVERHEAT PROTECTION THERMOSTAT / FLAME SENSOR / ENGINE COOLANT TEMPERATURE SENSOR, REPLACING

Fig 1: Identifying Engine Coolant Temperature Sensor

Courtesy of VOLVO CARS CORPORATION

• Continue 

  Refer to VERIFICATION 

Check the fuel pump (FP) and combustion preheater module (CPM) connectors. Check for contact resistance and oxidation.

Check the cable between combustion preheater module (CPM) terminal #13 and fuel pump terminal 1. Check for an intermittent open-circuit.

Check the cable between combustion preheater module (CPM) terminal #11 and fuel pump terminal 2. Check for an intermittent open-circuit.

Remedy as necessary.

Other information: 

• see CONNECTING THE BREAKOUT BOX
• see FUEL PUMP AUXILIARY HEATER, REPLACING
• see OVERHEAT PROTECTION THERMOSTAT / FLAME SENSOR / ENGINE COOLANT TEMPERATURE SENSOR, REPLACING
• see CHECKING WIRING AND TERMINALS

Fig 1: Identifying Fuel Pump Connector Terminals

Courtesy of VOLVO CARS CORPORATION

Fig 2: Identifying Ohm Meter

Courtesy of VOLVO CARS CORPORATION

Fig 3: Identifying Connector Terminals

Courtesy of VOLVO CARS CORPORATION

• Continue 

  Refer to VERIFICATION