Diagnostic Functions

Reading off Volvo Diagnostics

General
Fault information and other data can be read using the VIDA PC connected to the data link connector (DLC) via VCT2000. The data link connector (DLC) is located on the left of the center console (the right of the center console for right-hand drive cars). Connect VCT2000, see Connecting the Volvo Communication Tool 2000 (VCT 2000) Testing and Inspection.
VIDA PC communicates via VCT 2000 with the control module through a standardised interface.
To activate Volvo Diagnostics for the ECC system:
- ignition on.
- normal battery voltage.

Reading and erasing diagnostic trouble codes (DTCs)
Diagnostic trouble codes (DTCs), status, counters and frozen values can be read off and erased using this function.
Diagnostic trouble codes (DTCs) cannot be erased until they have been read off at least once and the fault rectified.
Diagnostic trouble codes (DTCs) are sent in event of the following faults in the components and wiring circuits:
- short-circuit
- open-circuit
- short-circuit to ground
- short-circuit to supply voltage
- component fault.

After fault-tracing / repairs:
When all connectors have been reconnected and all components reinstalled:
- Ignition off.
- reconnect the battery negative terminal
- ignition on.