Checking Components And Wiring

• Check the water pump and combustion preheater module (CPM) connectors. Check for contact resistance and oxidation. Check for damage in particular
• Check the cable between combustion preheater module (CPM) terminal #12 and water pump terminal 1. Check for an open-circuit. Check for a short-circuit to ground
• Check the cable between combustion preheater module (CPM) terminal #11 and water pump terminal 2. Check for an open-circuit.

The water pump must be replaced if no faults are found in the wiring.

Remedy as necessary.

Other information 

• see CONNECTING THE BREAKOUT BOX
• see SIGNAL SPECIFICATION
• see WATER PUMP ENGINE COOLANT HEATER, REPLACING
• see CHECKING WIRING AND TERMINALS

Fig 1: Brake Pedal Position Sensor Connector Terminal Identification

Courtesy of VOLVO CARS CORPORATION

Fig 2: Identifying Connector Terminals

Courtesy of VOLVO CARS CORPORATION

• Continue 

  Refer to VERIFICATION 

• Check the water pump and combustion preheater module (CPM) connectors. Check for contact resistance and oxidation
• Check the cable between combustion preheater module (CPM) terminal #12 and water pump terminal 1. Check for an intermittent open-circuit. Check for an intermittent short-circuit to ground
• Check the cable between combustion preheater module (CPM) terminal #11 and water pump terminal 2. Check for an intermittent open-circuit.

Remedy as necessary.

Other information 

• see CONNECTING THE BREAKOUT BOX
• see SIGNAL SPECIFICATION
• see WATER PUMP ENGINE COOLANT HEATER, REPLACING
• see CHECKING WIRING AND TERMINALS

Fig 1: Brake Pedal Position Sensor Connector Terminal Identification

Courtesy of VOLVO CARS CORPORATION

Fig 2: Identifying Connector Terminals

Courtesy of VOLVO CARS CORPORATION

• Continue 

  Refer to VERIFICATION