Electronic Shift Module (ESM)

NAG1 TRANSMISSION VERIFICATION TEST

To validate that the repair(s) fixed the vehicle, perform the following steps.

1. Reconnect any disconnected components.
2. Connect the scan tool to the Data Link Connector.
3. With the scan tool, erase ABS DTCs.
4. With the scan tool, erase PCM DTCs.
5. With the scan tool, erase TCM DTCs.

CAUTION: Apply the parking brake.

NOTE: The Transmission Temperature can only be read while in Reverse or Drive.

6. With the scan tool, display the Transmission temperature. Start and run the engine until the Transmission temperature is above 43° C (110° F).
7. If internal transmission components were repaired or replaced check the Transmission fluid and adjust if necessary. Refer to the proper Fluid Fill procedure. Procedures
8. If the TCM (EGS) is flashed or replaced, with the scan tool, perform an EGS initialization to relearn variant coding.
9. If internal transmission repairs are performed or replacement of the Transmission Control Module, perform a TCM ADAPTATION procedure. TCM Adaptation
10. After performing the above procedures, perform the Road Test Procedure.

ROAD TEST PROCEDURE

1. Road test the vehicle. Make fifteen to twenty 1-2, 2-3, 3-4, and 4-5 upshifts.
2. Perform these shifts from a standing start to 72 Km/h (45 mph) with a constant throttle opening of 20 to 25 degrees.
3. With speeds below 40 Km/h (25 mph), make five to eight wide open throttle kickdowns to 1st gear. Allow at least 5 seconds each in 2nd and 3rd gear between each kickdown.
4. With the scan tool, read DTCs.

Did any DTCs set?

Yes

- Perform the appropriate symptom(s).

No

- Testing is complete.