Vehicle Identification (VID) Block
WARNING: This page is about a different car, the 2003 Ford Focus. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Flash programming powertrain calibrations onto the PTEC is different than PMI. It has no effect on the backup data in the VID block memory area of the PTEC.
Some PTECs contain a memory area called a VID block. A portion of the VID block is used to store the backup data for each programmable module on the vehicle.
The VID block is not related to or affected by the powertrain calibration information stored in the PTEC. If a new powertrain calibration has been flashed onto the PTEC, the VID block will not be affected.
If using the PMI routine to install a new PTEC, the diagnostic tool will reprogram only VID information. The engine calibration information may still need to be flashed. For PTEC diagnostics, refer to WDS tool.