Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Off-Board Programming
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™ 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.
Before Programming a Control Module
- Ensure that all connections are secure at the following locations:
- The Off-Board Programming Adapter.
- The Tech 2™.
- The control module.
- The Techline™ terminal.
Off-Board Programming
- Obtain the VIN of the vehicle for which the control module is being programmed.
- With the Techline™ terminal, select Service Programming.
- Select Tech 2™, Reprogram ECU, and Off-Board Programming Adapter as the ECU location.
- Connect control module, Off-Board Programming Adapter, and Tech 2™ as described on the Techline™ terminal. Ensure you use the correct harness connector from the Off-Board Programming Adapter kit.
- With the Tech 2™, select Service Programming Request Information function. The Tech 2™ communicates with the control module and receives the access code.
- With the Tech 2™, exit the Service Programming Request Information.
- Disconnect the Tech 2™ from the Off-Board Programming Adapter.
- Connect the Tech 2™ to the Techline™ terminal.
- Turn ON Tech 2™.
- With Techline™ terminal, enter VIN of the vehicle that will be receiving the control module.
- The Techline™ terminal will display the message, attaching to database.
- Identify what type of programming that you are performing.
- Select the appropriate calibration file.
- Ensure all connections are secure.
- The Techline™ terminal displays a summary screen that summarizes your selections. After confirming you choices, the Techline™ terminal automatically loads the calibration files to the Tech 2™.
- After the download is complete, turn OFF the Tech 2™.
- Disconnect the Tech 2™ from the Techline™ terminal.
- Connect the Tech 2™ to the Off-Board Programming Adapter.
- With the Tech 2™, select Service Programming.
- With the Tech 2™, select Program.
- After the download is complete, exit Service Programming.
- Turn OFF the Off-Board Programming Adapter.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.