Originally Posted by
1project2many
I am sure the vans we use, model year 2000 and 2001 3500's, have the same chip assembly as older OBDI units.
TCII does not flash pcm's. It comes with a separate utility to flash pcm's. It's plausible that 1) the calibrations have enough similarity to other OBDII calibrations to require multi-checksum calculation and segment recognition that's available in TC OBDII, and / or 2) in order to keep software consistent the 1996 and newer 6.5's were grouped with other OBDII calibrations.
I wish I had time to follow up and straighten this out, if only for myself, but that's not likely to happen right now.
Apparently the 96-2003 6.5 ECM's CAN be flashed with TC2 calibrations using Winflash. I dont know whats up with your setup??
For 1996+ 6.5 Turbo Diesel programming
Dealers:
For 1996-2003 6.5 Turbo Diesel Trucks and H1 Hummer calibrations
You need to do the following:
1. DO NOT read the ECM for these models.
2. Query the computer/vehicle for VIN information.
3. Choose the correct calibration and make your changes.
4. Save the file with the correct VIN info in the calibration information box !
5. Turn on the ignition key and wait at least 30 seconds till glow plugs finish cycling.
6. Re-read Step 5. It's important !! A dead ECM can result unless the glow plug cycling finishes. Voltage is pulled so low at a glow plug cycle that
if you're programming in a GP cycle, it'll quit communicating.
7. Program as you normally would !
8. Road test and verify the performance gains. Some models will require you to re-tension the wastegate for the increased boost and airflow.
Lyndon, Owner
Westers Garage
peace
Hog
Bookmarks