Volvo C30 2007 Service And Repair Manual page 317

Fig. 9: Identifying Belt Routing
Courtesy of VOLVO CARS CORPORATION
Reinstall the connectors, components etc.

Ignition on

NOTE: For certain faults in the CAN-net where control modules have stopped
communicating, it may help to disconnect/reconnect the battery to
"restart" the control module/CAN-net.
Erase diagnostic trouble codes (DTCs) in all control modules.

Ignition off.

Ignition on.

Start the vehicle. Allow the vehicle to run for 10 minutes.

Read out the diagnostic trouble codes in the vehicle via the DIAGNOSTICS tab.

Does the diagnostic trouble code (DTC) for faulty communication return?
YES

Refer to INFORMATION
NO

OKAY: Troubleshooting has been completed.
CHECKING SHORT-CIRCUITING TO GROUND/VOLTAGE IN CAN-NET
Fig. 10: Ignition Off And Disconnecting Battery Negative Lead
Courtesy of VOLVO CARS CORPORATION
Ignition off.

Disconnect the battery negative lead.

2012 Volvo C30 T-5
ELECTRICAL Body Electrical