Checking component

Fig 1: Identifying Ignition Switch OFF Position

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off.
• Remove the system relay.

  Check if there is an open-circuit in the system relay #30(1) and #87(3) according to Open-circuit, permanent faults .

  HINT: When the relay is not routed their should be an open circuit between the system relay #30(1) and #87(3). If there is not an open-circuit the relay is defective. 

  Check signal cable between engine control module (ECM) #85(4) and brake pedal sensor #B38 (#B50) for a short-circuit to ground according to Short-circuit to ground, permanent faults .

  Remedy as necessary.

  Other information: 

  • To connect the breakout box, see Connecting the breakout box .
  • To access/replace the system relay, see Replacing relays in the main fuse box and other relays in the engine compartment .
  • The system relay coil #86(2) is connected to kl:30 and #87(3) and is connected to the engine control module (ECM) connector #B38 (#B50) and is actively low.
  • For information about signals, see Signal specification .
  Fig 2: Identifying Voltage Display

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Has the fault been remedied? 

• YES 

  Refer to Verification 

• NO 

  Refer to Checking power cable