Service Four-Wheel Drive Indicator Inoperative

Service Four-Wheel Drive Indicator Inoperative

Circuit Description

The Service 4WD indicator is located in the instrument panel cluster (IPC), and shares the common power and ground of the IPC. The transfer case shift control module controls the service indicator lamp by sending the IPC a Class 2 message. This lamp may be controlled with the scan tool using the IPC device controls.

Test Description

The number below refers to the step number on the diagnostic table.
2. This step determines if there is a class 2 communication error or if the IPC is faulty.