Operation CHARM: Car repair manuals for everyone.

Connecting to the Diagnostic System

Connecting and fault tracing of the diagnostic system






Volvo Diagnostic Key, PIN 998 8670. Follow the instructions in the documentation that comes with the instrument.






Or the diagnostic hookup can be used.

With Diagnostic Test Mode 4 the transfer rate between the control module and the diagnostic hookup can be altered.

Trouble code Function

3-1-1 Normal rate. Connected every time the ignition is turned ON.
3-1-2 Double rate. Experienced fault tracer can without problems use double rate.
3-1-3 Ten times normal rate. Used for Diagnostic Key.