Test G: The 4WD Indicator Does Not Operate Correctly

Pinpoint Test G: The 4WD Indicator Does Not Operate Correctly
Refer to Vehicle/Diagrams, Four-Wheel Drive System for schematic and connector information.

Normal Operation
The 4WD control module communicates with the instrument cluster through the high speed CAN. The instrument cluster illuminates the 4WD indicator when as requested by the 4WD control module. Problems with either the high speed CAN or the instrument cluster can effect 4WD operation.

4WD - Illuminates continuously when the 4WD system is locked into permanent 4-wheel drive due to heat protection mode. In the locked mode the vehicle resists turning and binds up when driven on dry pavement. To exit the locked mode, stop the vehicle and allow it to cool. When the 4WD indicator turns OFF, normal 4WD system function is restored. Driving the vehicle in this mode will not damage the 4WD system. The system can return to normal mode without stopping the vehicle if driving conditions allow.

4WD - Blinks continuously when the 4WD system is disabled due to its heat protection mode. To exit the disabled mode, stop the vehicle and allow it to cool. When the indicator turns OFF, normal 4WD system function is restored. Driving the vehicle in this mode will not damage the 4WD system. This will change how the vehicle handles in off-road, snowy or wet conditions. The system can return to normal mode without stopping if driving conditions allow.

4WD - Blinks 3, 6, 8 or 10 times every minute when the 4WD system requires service. Use a scan tool to check for DTCs. Refer to the Four-Wheel Drive (4WD) Control Module Diagnostic Trouble Code (DTC) Index. Diagnostic Trouble Code Tests and Associated Procedures





Possible Causes
^ SJB fuse(s) 18 (10A), 35 (5A)
^ 4WD control module
^ Instrument cluster
^ Circuitry

G1-G4:

G4-G8: