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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, Clear DTCs. Make sure that all accessories are turned off and that the battery is fully charged. Move the Transfer Case Selector Switch to the desired position. Test drive the vehicle in each Transfer Case range and verify proper operation in each range. NOTE: To select or deselect 2WD, AWD or 4HI mode, vehicle speed must be below 55 MPH (88 KM/H) with NOTE: Shifts will not take place with a wheel speed difference of greater than 13 MPH between the front and NOTE: To select or deselect 4LO (if equipped), vehicle speed must be below 3 MPH (5 KM/H) with the igni- NOTE: To select or deselect Transfer Case Neutral, vehicle speed must be 0 MPH with the ignition ON, 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 Are there any Transfer Case DTCs present in the Front Control Module (FCM) or the Instrument Cluster Yes >> Return to the symptom list and perform the appropriate diagnostic test. No >> Repair is complete. MODULE-TRANSMISSION CONTROL DESCRIPTION The Transmission Control Module (TCM) is a sub- HB ELECTRONIC CONTROL MODULES - SERVICE INFORMATION 8E - 217 |