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Home >> GMC >> 2003 >> Envoy RWD >> Repair and Diagnosis >> General Information >> Computer Relearn Procedures >> Engine Control Module Or Powertrain Control Module >> Service Programming System Off Board Pass-Thru Procedure >> Performing The Off Board Pass-Thru Procedure
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Performing The Off Board Pass-Thru Procedure

  1. Launch the Techline Information System (TIS) application in the terminal.
  2. Select the SERVICE PROGRAMMING SYSTEM.
  3. Highlight the following information on the Select Diagnostic Tool and Programming Process Screen:
    1. Select Diagnostic Tool  - Select PASS-THRU.
    2. Select Programming Process  - Identify whether an existing module is being reprogrammed, or a module is being replaced with a new one.
    3. Select ECU location  - Select Off-Board Programming Adapter.
  4. Select NEXT.
    5. NOTE: To reduce the potential for signal loss, the RS-232 cable should NOT be more than 25 feet long.
  5. Complete all terminal-directed data at the PREPARING FOR COMMUNICATION/DETERMINE VEHICLE screen until NEXT is highlighted. See Figure.
  6. Select NEXT.
  7. Follow the on-screen instructions for connecting the following components:
    • The PCM.
    • The Off-Board Programming Adapter (OBPA). Refer to the TIS Users Guide for a listing of OBPA.
    • The Tech 2.
  8. Select NEXT.
  9. Pass-Thru displays the VIN stored in the PCM. If a new PCM is being programmed, enter the correct VIN of the vehicle.
  10. Select NEXT.
  11. Select the appropriate options if the OPTIONS screen appears.
  12. Select NEXT.
    13. NOTE: 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 Techline Customer Support.
  13. Select the type of programming to be performed from the following categories:
    1. Normal  - Used for updating an existing calibration or programming a new controller.
    2. Vehicle Configuration Index  - Used for updating an existing controller or programming a new controller for newer vehicles whose VINs are not yet in the database.
    3. Reconfigure  - Used to reconfigure a vehicle for changes in tire size and axle ratios.
  14. Select NEXT.
  15. Select a calibration selection on the Calibration Selection screen, if necessary.
  16. Ensure all the desired calibration folder tabs have a green check mark.
  17. Select NEXT.
  18. Verify the current and selected calibration of the PCM on the Summary screen.
  19. Select NEXT.
    20. NOTE: Select CANCEL if you receive a message stating that the calibration selected is already the current calibration in the PCM and reprogramming with the same download is not allowed.
  20. Select OK.
    21. NOTE: On model year 1996 and newer controllers, a Crankshaft Position (CKP) relearn procedure box may appear. See CRANKSHAFT POSITION SENSOR SYSTEM VARIATION LEARN PROCEDURE .
  21. Select OK.
  22. When programming is complete, a PROGRAM CONTROLLER/PROGRAMMING COMPLETE screen appears. Follow the on-screen instructions, if any.
  23. Select CLOSE.
  24. Turn OFF the OBPA.
  25. Turn OFF the scan tool.
    26. NOTE: Wait 30 seconds after the OBPA is shut OFF before disconnecting the PCM.
  26. Disconnect the OBPA from the Tech 2 and the PCM.
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