C0611

DTC C0611

Circuit Description
The transfer case shift control module uses the VIN information for calculations that are required for the different calibrations used based on axle ratio, transmission, tire size, and engine. The system does not know which calibration to use without this information.

Conditions for Running the DTC
^ The transfer case shift control module is able to communicate via class 2 serial data.
^ The ignition is ON.
^ The system voltage is 9-16 volts.

Conditions for Setting the DTC
The transfer case shift control module does not receive a valid VIN digit for the correct application, K truck, L van or T truck within 2 seconds after power up.

Action Taken When the DTC Sets
^ The ignition counts since last fault is cleared.
^ The system is disabled until valid VIN data is received.
^ The SERVICE AWD indicator remains illuminated for the remainder of the ignition cycle.

Conditions for Clearing the DTC
A history DTC clears after a valid VIN digit is received.

Test Description
The numbers below refer to the step numbers on the diagnostic table.
3. This step tests whether the condition is module, system or condition related.
4. This step tests whether the condition has been corrected.
5. This step replaces the transfer case shift control module.

Steps 1 - 6:

DTC C0611