Checking The Control Module

Fig 1: Identifying Ignition ON

Courtesy of VOLVO CARS CORPORATION

Fig 2: Identifying Connector

Courtesy of VOLVO CARS CORPORATION

• Ignition on
• Pressure sensor connector disconnected
• The breakout box connected.

  Check the voltage supply using a voltmeter:

  Pressure sensor 1 

  • between terminal #A21 and terminal #A22 on the breakout box.

  Pressure sensor 2 

  • between terminal #A18 and terminal #A19 on the breakout box.

  The voltage must be approximately 5 V. Replace the brake control module (BCM) if the voltage is incorrect.

  Other information 

  • To connect the breakout box, see CONNECTING THE BREAKOUT BOX, BRAKE CONTROL MODULE (BCM)
  • To replace the control module, see BRAKE CONTROL MODULE (BCM), REPLACING
  • For information about signals, see SIGNAL SPECIFICATION, BRAKE CONTROL MODULE (BCM) WITH DSTC (DYNAMIC STABILITY AND TRACTION CONTROL) .
  Fig 3: Identifying Pedal Position Sensor Connector

  Courtesy of VOLVO CARS CORPORATION
  Fig 4: Identifying Voltage Display

  Courtesy of VOLVO CARS CORPORATION

Was the voltage OK? 

• YES 

  see CHECKING WIRING AND SENSORS 

• NO 

  see VERIFICATION