General Motors Tech2 User Guide
139
Pass-Thru Programming Procedure
1. Launch TIS2Web.
2. From the TIS2Web main screen, select the Service Programming System icon.
3. At the Select Diagnostic Tool and Programming Process screen:
• Select Pass-Thru under “Select Diagnostic Tool.”
• Under “Select Programming Process,” select Reprogram ECU or Replace and
Program ECU, depending on whether you are reprogramming an existing
module or replacing a module.
• Under “Select ECU Location,” select Vehicle or Off Board Programming
Adapter (OBPA), depending on whether you are performing on-vehicle or off-
board programming.
• Select Next.
Select Diagnostic Tool and Programming Process screen showing selections
appropriate for pass-thru
4. At the Preparing for Communication “Determine Vehicle” screen, complete all
computer directed data until Next is highlighted (vehicle data will vary). Select Next.
IMPORTANT: In order to reduce the potential for signal loss, the RS-232 cable
should not be more than 25 feet long.
5. Follow the instructions on the Preparing for Communication screen, then select
Next.
6. Verify the VIN at the Validate Vehicle Identification Number (VIN) screen. Select
Next.
If the option screen appears: Enter all information, then select Next.
IMPORTANT: If the vehicle identification number (VIN) does not appear correctly,
the correct VIN must be entered
7. At the Supported Controllers screen:
• Select the appropriate control module under “Select Controller,” e.g.
PCM/VCM Powertrain/Vehicle Control Module. Options available in the
Select Controller box will vary depending upon the VIN number entered at
the previous screen.
• Select the appropriate programming type (Normal, VCI, or Reconfigure).
• Select Next.
IMPORTANT:
When selecting the vehicle configuration index (VCI) programming type, a valid VCI
number for the vehicle must be entered. This number may be obtained from the ACDelco
Aftermarket Support Center.
The correct tire size and axle ratio must be highlighted and a valid VCI number entered if
you select Reconfigure for your programming type.
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.
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