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Home >> Jeep >> 2007 >> Commander Base, 3.7 K, 4WD >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Nag1 Automatic Transmission - Electrical Diagnostics >> Nag1 - Electrical Diagnostics >> DTC Troubleshooting >> P0602-Control Module Programming Error/Not Programmed >> Diagnostic Test
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Diagnostic Test

  1. 1) CHECK IF THE TCM IS FLASHABLE 
    NOTE: Controller is programmed with generic software and will not allow the correct vehicle Powertrain management.

    With the scan tool, record the vehicles controller part number.

    Select Use Controller Part Number under the Flash Tab.

    Flash the controller with the correct software.

    Were you able to update (flash) the controller successfully? 

    Yes 

    1. Test Complete.
    2. Perform NAG1 TRANSMISSION VERIFICATION TEST .

    No 

    1. Replace the TCM per the Service Information. Refer to MODULE-TRANSMISSION CONTROL for the appropriate service procedures.
    2. Perform NAG1 TRANSMISSION VERIFICATION TEST .
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