Engine Control Module (ECM) - Programming

NOTE: DO NOT disturb the tool harness while programming. If an interruption occurs during the programming procedure, programming failure or control module damage may occur.

IMPORTANT: The ECM can only be programmed using the Pass-The Programming method. The Pass-Thru Programming method requires the use of a scan tool in series with the Techline Terminal and the DLC.

1. Turn OFF the ignition.
2. From the Techline terminal, select Service Programming System.
3. Select Pass - Thru as the Diagnostic Tool.
4. Select the Programming Process you are using.
5. Select Vehicle for the ECU location.
6. Complete the vehicle information on the Connect Scan Tool/Determine Vehicle screen.
7. Turn ON the ignition, with the engine OFF.
8. Install the Tech 2 to the data link connector (DLC).
9. Connect the RS-232 cable to the Tech 2 and the Techline terminal.
10. Turn ON the Tech 2 and wait for the Start screen.
11. Verify the displayed VIN on the Techline terminal with the vehicle VIN. Correct the VIN as necessary.
12. Select the type of module you are programming.
13. Select the type of programming that you are performing.
14. Select the appropriate calibration file.

IMPORTANT: DO NOT turn OFF the ignition if the programming procedure is interrupted or unsuccessful. Ensure that all the ECM and DLC connections are secure and the Techline operating software is up to date. Attempt to reprogram the control module. If the control module cannot be programmed, replace the control module. Refer to Engine Control Module (ECM) Replacement

15. Verify the Current calibration with the Selected calibration then select Next. This will initiate the download of the calibration files.
16. After the download is complete, EXIT Service Programming.
17. Turn OFF the ignition for 30 seconds.
18. If the control module was replaced, the following procedures must be performed:
^ Idle Learn Procedure
^ Theft deterrent password learn procedure- Refer to Engine Control Module (ECM) Replacement
^ Perform the Inspection/Maintenance (I/M) Complete System Set Procedure if the vehicle is from an area participating in OBD system inspections as part of a state I/M program.