Volvo C30 2007 Service And Repair Manual page 319

Fig. 11: Identifying OWS Schematic
Courtesy of VOLVO CARS CORPORATION
Was a fault detected?
YES

Refer to VERIFICATION
NO

Refer to CHECKING THE TRAFFIC LOAD ON THE CAN CABLES
CHECKING VOLTAGE-DROP IN CABLE FOR CAN-H AND CAN-L, RESPECTIVELY
Fig. 12: Checking Traffic Load On CAN Cables
Courtesy of VOLVO CARS CORPORATION
Connect the battery.

Ignition on.

Connect OBDII-Box (951 3015) to the diagnostics socket.

For general information about CAN-troubleshooting:
see GENERAL INFORMATION ABOUT FAULT-TRACING IN THE CAN NETWORK

2012 Volvo C30 T-5
ELECTRICAL Body Electrical