Transfer Case Verification Test

TRANSFER CASE VERIFICATION TEST VER 1.

Diagnostic Test
1. TRANSFER CASE VERIFICATION TEST- VER 1.
Disconnect all jumper wires and reconnect all previously disconnected components and connectors. With the scan tool, select Clear Stored DTCs.
Make sure that all accessories are turned off and that the battery is fully charged. Test drive the vehicle in each Transfer Case range and verify proper operation in each range.

NOTE: To select or deselect 4LO (if equipped), vehicle speed must be below 3 M.P.H. (5 KM/H) with the ignition ON and the transmission in neutral (auto trans).

NOTE: To select or deselect Transfer Case Neutral, vehicle speed must be 0 M.P.H. with the ignition ON, engine OFF, the brake pedal applied, and the transmission in neutral (auto trans). Press the Neutral button (if equipped) on the Transfer Case Selector Switch until the Neutral Indicator is illuminated solidly and the cluster displays '4WD System in Neutral'.

WARNING: Apply the parking brake. The vehicle may roll with the Transfer Case in neutral.

NOTE: To verify that the Transfer Case is in Neutral, shift the automatic transmission into reverse and release the brake pedal for three seconds. There should be no vehicle movement if the Transfer Case is in Neutral.

With the scan tool, select View DTCs in the Final Drive Control Module.
Are there any DTCs present in the Final Drive Control Module?
Yes >> Return to the Trouble Code Diagnostic Charts and perform the appropriate diagnostic test.
No >> Repair is complete.