Replacing Start Control Unit (SCU)

Fig 1: Identifying Ignition OFF

Courtesy of VOLVO CARS OF NORTH AMERICA.

Check the cables and connections between the Start Control Unit (SCU) and the Central electronic module (CEM).

Check the fuse for the Start Control Unit (SCU).

If no fault is found on the cables or connections this means that the Start Control Unit (SCU) is defective and must be replaced.

Other information 

• see IGNITION LOCK
• see CONTENTS
• For further information about the fuses and relays, see the Wiring Diagram.

Fig 2: Identifying Start Control Unit (SCU)

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Continue 

  Refer to VERIFICATION 

Fig 1: Identifying Ignition OFF

Courtesy of VOLVO CARS OF NORTH AMERICA.

Check the cables and connections between the Start Control Unit (SCU) and the Central electronic module (CEM).

Check the fuse for the Start Control Unit (SCU).

If no fault is found on the cables or connections this means that the Start Control Unit (SCU) is defective and must be replaced.

Other information 

• see IGNITION LOCK
• see CHECKING WIRING AND TERMINALS

Fig 2: Identifying Start Control Unit (SCU)

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Continue 

  Refer to CHECKING IGNITION SWITCH 

Fig 1: Identifying Ignition OFF

Courtesy of VOLVO CARS OF NORTH AMERICA.

Check cables and connections to Start control module (SCU).

Check the fuse for the Start Control Unit (SCU).

If no fault is found on the cables or connections this means that the Start Control Unit (SCU) is defective and must be replaced.

Other information 

• see IGNITION LOCK
• see CHECKING WIRING AND TERMINALS

Fig 2: Identifying Start Control Unit (SCU)

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Continue 

  Refer to CHECKING IGNITION SWITCH