The SERVICE AWD indicator is located in the instrument cluster. It receives ignitions voltage from a 10 amp gage fuse through the ignition 1 voltage circuit. This circuit also supplies all of the gages with ignition voltage. The transfer case shift control module controls the SERVICE AWD indicator by sending the instrument cluster a Class 2 message. This lamp may be controlled with the scan tool using the instrument cluster output controls.
The numbers below refer to the step numbers on the diagnostic table.
Step | Action | Yes | No |
---|---|---|---|
Schematic Reference: Transfer Case Control Schematics | |||
1 | Did you perform the Diagnostic System Check - Transfer Case? | Go to Step 2 | |
Does the SERVICE 4WD message turn ON? | Go to Step 3 | Go to Instrument Panel Assembly Replacement in Instrument Panel, Gages and Console | |
3 | Replace the transfer case shift control module. Refer to Transfer Case Shift Control Module Replacement . Did you complete the repair? | Go to Step 4 | -- |
4 |
Does the symptom occur? | Go to Step 2 | System OK |