Off-Board Pass-Thru Procedure

The Off-Board Programming Adapter Kit (J-41207-C) is required when a module must be programmed without having the vehicle present. The adapter allows the module to be turned ON and communicate with scan tool.

NOTE: Ensure Tech 2™ scan tool and terminal are both equipped with the latest software before performing programming.

Launch the TIS application in the terminal.
Select the Service Programming System.
Highlight the following information on the Select Diagnostic Tool and Programming Process Screen:
- Select Diagnostic Tool. Select Pass-Thru.
- Select Programming Process. Identify whether an existing module is being reprogrammed, or a module is being replaced with a new one.
- Select ECU location. Select Off-Board Programming Adapter.
Select Next.

NOTE: In order to reduce the potential for signal loss, the RS-232 cable should NOT be more than 25 feet long.

Complete all terminal-directed data at the Preparing for Communication/Determine Vehicle screen until Next is highlighted.
Select Next.
Follow the on-screen instructions for connecting the following components:
- The control module.
- The Off-Board Programming Adapter (OBPA). Refer to TIS user's guide for a listing of OBPA.
- Tech 2™.
Select Next.
Pass-Thru displays the VIN stored in the control module. If a new control module is being programmed, enter the correct VIN of the vehicle.
Select Next.
Select the appropriate options if the Options screen appears.
Select Next.

NOTE: When selecting Vehicle Configuration Index (VCI) programming type, a valid VCI number for the vehicle must be entered. This number may be obtained from Techline® Customer Support.

Select the type of programming to be performed from the following categories:
- Normal. Used for updating an existing calibration or programming a new controller.
- Vehicle Configuration Index (VCI). Used for updating an existing controller or programming a new controller for newer vehicles whose VINs are not yet in the database.
- Reconfigure. Used to reconfigure a vehicle for changes in tire size and axle ratios.
Select Next.
Select a calibration selection on the Calibration Selection screen, if necessary.
Ensure all the desired calibration folder tabs have a Green check mark.
Select Next.
Verify the current and selected calibration of the control module on the Summary screen.
Select Next.

NOTE: Select Cancel if you receive a message stating that the calibration selected is already the current calibration in the control module and reprogramming with the same download is not allowed.

Select OK.

NOTE: On 1996 and newer controllers, a Crankshaft Position (CKP) sensor relearn procedure box may appear.

Select OK.
When programming is complete, a Program Controller/Programming Complete screen appears. Follow the on-screen instructions, if any.
Select Close.
Turn OFF the OBPA.
Turn OFF scan tool.

NOTE: Wait 30 seconds after the OBPA is shut OFF before disconnecting the control module.

Disconnect the OBPA from the Tech 2™ and the control module.