Diagnostic Aids
- DTC U209D will only set as current with the ignition in the OFF position. It will become history when the ignition is turned ON.
- When testing circuits to the SDGM access can be accomplished by removing the instrument panel center trim panel. Note that this procedure does not allow removal of the SDGM, only access to the connector. Refer to Instrument Panel Center Trim Panel Replacement (Cadillac) , Instrument Panel Center Trim Panel Replacement (Except Cadillac) .
- Different DTCs may set in different modules along with this DTC depending on where the fault occurs and the vehicle operating conditions when the fault occurs.