To read the VCM follow these steps:
- Plug the interface
cable into the vehicle OBD2 port and PC serial/USB interface. See
to the Vehicle section for more information.
- Open VCM Editor,
ensure no files are currently open and select "Read Entire" from
the "Flash" menu. Alternatively, click the "Read VCM" icon on the
toolbar. The Read VCM form will appear.
- Put the key in the
ignition and turn to the ON position (do not start the
- Make sure the doors
are closed and accessories are turned off (do not lock or unlock
the doors during reading or writing procedures or operate any
- Wait 10 to 15
- Click the "Begin"
- Allow the PC to read
the VCM until the status says "VCM Read Completed".
- Turn off ignition and
optionally unplug the interface cable.
- The file is now
automatically opened in the VCM Editor and modification can begin.
We recommend that if this is the initial read of the stock VCM that
you save (and backup) the file with a meaningful name such as
"stock.hpt" before any modifications are made. You may wish to
restore your vehicle to the stock tune at a later date.
Please note for vehicles with multiple VCM's (eg. LS2 A4 vehicles)
there is a 15 second pause between reading each VCM.
When you read the VCM, the program is uploading calibration
information from your VCM into the VCM Editor application. The read
process will automatically detect the presence of relevant VCM's in
the vehicle and read them all in sequence transparently to the
user. The various status messages and progress bar give information
about the current state of the read.
It is not possible to harm your PCM during the read process. If
communications is lost the program will automatically reset the PCM
after a short delay and prompt you to rectify the problem and/or
Approximate read times (error free, high speed mode) are as
||Read Time (approx.)
|LS1 V8 PCM (512k)
|LS1 V8 PCM (1024k)
|V6 PCM (512k)
|V6 PCM (1024k)
|LS2 V8 ECM (1280k)
|LS2 V8 ECM + TCM (1984k)
|P12 I4/I5/I6 ECM
|Bosch Alloytec ECM