Inspection and Verification
Inspection and Verification-Electronic Shift1. Visually inspect the following for obvious signs of mechanical and electrical damage.
Visual Inspection Chart
2. If the concern remains after the inspection, connect the diagnostic tool to the data link connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle:
^ check that the program card is correctly installed.
^ check the connections to the vehicle.
^ check the ignition switch position.
3. If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool manual.
4. Carry out the DATA LINK DIAGNOSTICS test. If the diagnostic tool responds with:
^ CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, refer to Module Communications Network.
^ NO RESP/NOT EQUIP for 4WD control module, go to Pinpoint Test B.
Test B: No Communication With the 4 Wheel Drive Control Module
^ SYSTEM PASSED, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs and carry out the 4WD control module self-test.
5. If the DTCs retrieved are related to the concern, go to the 4WD Control Module Diagnostic Trouble Code (DTC) Index to continue diagnostics.
6. If no DTCs related to the concern are retrieved, carry out the Electronic Shift Function Test. Refer to Functional Test-Electronic Shift (Pinpoint Test A).
Test A: Functional Test-Electronic Shift