Checking the wiring

Fig 1: Identifying Ignition OFF

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off
• Disconnect connector from the seat heater module.

  Check the cable between fuse 11C/8 terminal #2 (25A) and seat heater (9/12) for left seat and (9/13) for right seat connector terminal #1. Check for a short-circuit to ground.

  Remedy as necessary.

  Other information: 

  • To connect the breakout box, see Connecting the breakout box
  • For information about signals, see Signal specification and Signal specification
  • See Checking wiring and terminals .
  Fig 2: Breakout Box

  Courtesy of VOLVO CARS OF NORTH AMERICA.
  Fig 3: Identifying Ohmmeter

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Is the cable OK? 

• YES 

  Refer to Checking the cable 

• NO 

  OKAY:  Troubleshooting has been completed.

Check the cable between fuse 11C8 terminal #2 (25A) and seat heater (9/12) for left seat and (9/13) for right seat connector terminal #1. Check for contact resistance and oxidation. Check for an intermittent open-circuit.

Remedy as necessary.

Other information: 

• To connect the breakout box, see Connecting the breakout box
• For information about signals, see Signal specification and Signal specification .
• See Checking wiring and terminals .

Fig 1: Breakout Box

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Ohmmeter

Courtesy of VOLVO CARS OF NORTH AMERICA.