Automatic Transmission 62TE

P0602 - Control Module Programming Error/Not Programmed

For a complete wiring diagram, refer to.

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.

• The 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 => Non-DTC Based Diagnostics. Pre-Diagnostic Troubleshooting Procedure

Test Step 1 - Control Module Programming Error

• Controller is programmed with generic software and will not allow the correct vehicle powertrain management.

• Record the controller part number.

• Update the controller with the correct software.

Verify that the controller updated successfully.

Test Complete

• Perform the Transmission Verification Test. Refer to => Non-DTC Based Diagnostics. Transmission Verification Test