Checking The 30-Supply (Valves) To The Control Module

Fig 1: Identifying Ignition ON

Courtesy of VOLVO CARS CORPORATION

• The breakout box connected
• Ignition on.

  Check the voltage between breakout box terminals #16 and #32 and between terminals #32 and #46. The voltmeter should read battery voltage.

  Check that the fuse for the circuit is intact if the voltage is incorrect.

  If the fuse is blown, check the cable between brake control module terminal #32 (#A32) and the fuse. Check for a short-circuit to ground.

  If the fuse is intact, check the cable between brake control module terminal #32 (#A32) and the fuse. Check for an open-circuit.

  Remedy as necessary

  Fig 2: Breakout Box

  Courtesy of VOLVO CARS CORPORATION
  Fig 3: Identifying Voltage Display

  Courtesy of VOLVO CARS CORPORATION

Was a fault detected? 

• YES 

  see VERIFICATION 

• NO 

  see INFORMATION