Transfer Case Shift Control Switch Indicators Flash Continuously 15 Seconds or More

Transfer Case Shift Control Switch Indicators Flash Continuously 15 Seconds or More





Circuit Description
This symptom is usually the result of actions expected to take place during the transition of a transfer case mode change which has not happened. When the transfer case changes from 2WD to 4WD for example, the front axle is locked by the transfer case shift control module. If the transfer case shift control module does not sense that the front axle is applied, it waits for the action to take place before the gear change is made. While waiting, the mode switch lamp continues to flash for a period of time, and all other mode requests are ignored for the duration of the ignition cycle.

Test Description
The numbers refer to the step numbers on the diagnostic table.
2. This step determines the position of the front axle switch.
3. This step helps determine if the front axle does not engage.
4. This step helps determine if the front axle does not disengage.