P0602 - Control Module Programming Error/Not Programmed

For a complete wiring diagram, refer to appropriate Wiring Diagram.

Theory Of Operation 

The controller is programmed during manufacturing with generic software to facilitate testing. This software does not have the proper calibrations to control a transmission in a vehicle. The check for generic software is made at power-up. If generic software is found, the MIL will light immediately and the MIL will stay on even if the fault is cleared, until the proper software is installed. Note: Transmission will be placed in limp-in mode.

• >>When Monitored:<< Check for generic software is made at power-up.
• >>Set Condition:<< If generic software is found, the MIL will light immediately. This DTC is designed to signal the technician that the controller still has generic software installed.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to TRANSMISSION PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

Test Step 1 - Control Module Programming Error 

• Record the controller part number.
• Update the controller with the correct software in accordance with the Service Information.

Verify that the controller updated successfully.

Test Complete

• Perform the Transmission Verification Test. Refer to TRANSMISSION VERIFICATION TEST .