Ford 2003 Mustang Workshop Manual page 14

5 Design level (design level assigned to the engine)
Protocol 3
Item
1 Model year (model year in which calibration strategy was first introduced)
2 Vehicle code
3 Transmission code
4 Unique calibration (designates different hardware to similar vehicles). Example: tires, drive
ratios, etc.
5 Fleet code (describes fleet to which the vehicle belongs). Example: 6 - evaporative emissions
6 Certification region (lead region where multiple regions are included in one calibration).
Example: A - U.S. federal
7 Revision level (will advance as revisions occur). Not printed on label
Protocol 3
The following offers a more detailed explanation of the coding strategy used for protocol 3.
Model Year
Y — 2000
1 — 2001
2 — 2002
3 — 2003
Vehicle Line
ZE — Mustang
Transmission
1 — Automatic transmission
2 — Manual transmission
Unique Calibration
The Emissions/CAFE/CO2 Compliance Department is responsible for assigning these calibration
numbers. Unique calibration identifications are assigned to cover similar vehicles to differentiate tires,
drive configurations, final drive ratios and other calibration-significant factors.
Description