C 3500 Truck 2WD V8-6.6L DSL Turbo VIN 1 (2002)
Engine Control Module: Service and Repair
Engine Control Module (ECM) Programming Procedure (Off-Board)
BEFORE PROGRAMMING A CONTROL MODULE
IMPORTANT:
^
Do NOT program a control module unless you are directed by a service procedure or you are directed by a General Motors Corporation service
bulletin. Programming a control module at any other time will not permanently correct a customer's concern.
^
The Off-Board Programming is used in situations where a control module must be programmed without having the vehicle present. The Off-Board
Programming Adapter must be used to perform the Off-Board Programming procedure. The adapter allows the control module to power up and
allows the Tech 2(TM) to communicate with the control module.
^
DO NOT disturb the tool harnesses while programming. If an interruption occurs during the programming procedure, programming failure or
control module damage may occur.
Ensure that all connections are secure at the following locations:
^
The Off-Board Programming Adapter
^
The Tech 2(TM)
^
The control module
^
The Techline(TM) terminal
OFF-BOARD PROGRAMMING
1. Obtain the VIN of the vehicle for which the control module is being programmed.
2. Select Service Programming with the Techline(TM) terminal.
3. Select Tech 2(TM), Reprogram ECU, and Off-Board Programming Adapter as the ECU location.
4. Connect the control module, Off-Board Programming Adapter, and the Tech 2(TM) as described on the Techline(TM) terminal. Ensure you use
the correct harness connector from the Off-Board Programming Adapter kit.
5. Select Service Programming Request Information function with the Tech 2(TM). The Tech 2(TM) communicates with the control module and
receives the access code.
6. Exit the Service Programming Request Information with the Tech 2(TM).
7. Disconnect the Tech 2(TM) from the Off-Board Programming Adapter.
8. Connect the Tech 2(TM) to the Techline(TM) terminal.
9. Turn ON the Tech 2(TM).
10. Enter the VIN of the vehicle that will be receiving the control module with the Techline(TM) terminal.
11. The Techline(TM) terminal will display the message, attaching to database.
12. Identify what type of programming that you are performing.
13. Select the appropriate calibration file.
14. Ensure all connections are secure.
15. The Techline(TM) terminal displays a summary screen that summarizes your selections. After confirming you choices, the Techline(TM) terminal
automatically loads the calibration files to the Tech 2(TM).
16. After the download is complete, turn OFF the Tech 2(TM).
17. Disconnect the Tech 2(TM) from the Techline(TM) terminal.
18. Connect the Tech 2(TM) to the Off-Board Programming Adapter.
19. Select Service Programming With the Tech 2(TM).
IMPORTANT: DO NOT turn OFF the Off-Board Programming Adapter if the programming procedure is interrupted or unsuccessful. Ensure the
control module and the Off-Board Programming Adapter connections are secure and the Techline(TM) 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.
20. Select Program With the Tech 2(TM).
21. After the download is complete, exit Service Programming.
22. Turn OFF the Off-Board Programming Adapter.
