TCM Initialization Procedure

TCM Initialization Procedure (if not done as part of TCM reprogramming)

NOTE:
If reprogramming is not performed, make sure TCM initialization is performed as part of the control valve assembly replacement.

1. Set the parking brake with the selector lever in "P" (Park).

2. C-III and the Vehicle Interface (VI) should still be on and connected, and the vehicle ignition turned ON (engine OFF - not running).

3. Navigate C-III screens to Transmission, then Special Functions.

4. Select the TCM part number (P/N) and Calibration Data, and then print and save a copy.

5. Perform the initialization (EEPROM erase) procedure as follows:

a. Select Transmission Self Diagnostic Results.

b. Shift the selector lever to "R" (Reverse).

c. Press and hold the brake pedal.

d. Press and hold the accelerator pedal down about one-third, but no more than halfway. The purpose of this step is to get both the wide open throttle and closed throttle position signals to read "OFF" at the same time.

e. Press Erase.

f. Shift the selector lever to "P" (Park).

g. Turn the ignition OFF.

h. Wait 5 seconds.

I. Turn the ignition ON.

6. Select and print the TCM P/N and Calibration Data again.

7. Compare the values between the first and second Calibration Data prints.

^ The procedure is complete if the values are different.

8. Make sure to erase DTCs from all systems.