Checking The Ignition Switch

• Make sure no other remote key or transponder, which can interfere with communication, is in the vicinity of the Start control module (SCU).
• Change to another key belonging to the vehicle. Try to start the engine.
• If it works with another key new software must be ordered for the key that does not work.
• If it does not work with another key, the Start Control Unit (SCU) is defective and must be replaced.
• Remedy as necessary.

Other information: 

• see IGNITION LOCK

Fig 1: Locating Start Control Module (SCU)

Courtesy of VOLVO CARS CORPORATION

• Continue 

  Refer to VERIFICATION