Checking components and wiring

Fig 1: Identifying Ignition OFF

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off.

  Check that the fuses for the suspension module (SUM) are intact.

  Check the relay for 15i power supply.

  HINT: In the event of a fault in the 15i power supply relay, diagnostic trouble codes (DTCs) are stored in the central electronic module (CEM). If diagnostic trouble codes (DTCs) are stored for the relay, fault trace accordingly. 

  Check the cable between the fuse and 15i power supply relay terminal #3. Check for an open-circuit. Check for a short-circuit to ground.

  Check the cable between 15i power supply relay terminal #1 and suspension module (SUM) terminal #C1 (#31). Check for an open-circuit. Check for a short-circuit to ground.

  Check the cable between suspension module (SUM) terminal #C2 (#32) and ground. Check for an open-circuit. Check for a short-circuit to supply voltage.

  Other information 

  • To connect the breakout box, see Connecting the breakout box
  • For further information about signals and other values, see Signal specification
  • See Checking wiring and terminals
  Fig 2: Identifying Ohmmeter

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Was a fault detected? 

• YES 

  Refer to Verification 

• NO 

  Refer to Checking the bus cable