Checking The Control Module

Fig 1: Identifying Ignition ON

Courtesy of VOLVO CARS CORPORATION

Fig 2: Connecting Connector

Courtesy of VOLVO CARS CORPORATION

• Ignition off
• Reinstall the components, reconnect the connectors etc.
• Ignition on
• Read off the pressure in the brake system from the relevant pressure sensor
• Depress the brake pedal.

  The brake pressure must increase with increased pedal pressure.

  Fig 3: Breakout Box

  Courtesy of VOLVO CARS CORPORATION
  Fig 4: Identifying Voltage Display

  Courtesy of VOLVO CARS CORPORATION

Does the brake pressure increase? 

• YES 

  see VERIFICATION 

• NO 

  see INFORMATION