Checking the control module

Fig 1: Identifying Ignition Switch ON Position

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Connectors

Courtesy of VOLVO CARS OF NORTH AMERICA.

• 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 

  • Connect the breakout box.
  • 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 OF NORTH AMERICA.
  Fig 4: Identifying Voltmeter

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Was the voltage OK? 

• YES 

  Refer to Checking wiring and sensors 

• NO 

  Refer to Verification