Definition of Terms

Calibration Update: Some modules are designed to be flashed or reflashed with complete new software packages. This process of reflashing the module is a calibration update.

Programmable Parameters: These are options contained within the existing software. These include items such as tire size, customer preference items and anti-theft options. The current settings are downloaded from an existing module then uploaded to a new module. They can also be configured using the diagnostic tool. Programming parameters is different from updating calibrations as no software is changed, only the options already contained in the software.

Some modules must be programmed (configured) as part of the repair procedure. If this procedure is not followed, the module will not function correctly and may set a number of DTCs, including B2477 or P1639, which indicate that some necessary data has not been programmed into the module.

Modules that need programming should not be exchanged between vehicles. In most cases the parameter values or settings are unique to that vehicle, and if not set correctly will cause concerns or faults.

The worldwide diagnostic system (WDS) will automatically attempt to retrieve the module configuration information from all modules, and from a backup location in the powertrain control module (PCM) when vehicle ID is carried out. If the module and the PCM do not contain correct information, the diagnostic tool will either request As-Built data or display a list of items that you will need to manually configure. The diagnostic tool will program the module based on the data you enter.

For additional WDS/diagnostic tool programming procedures, refer to PROGRAMMABLE MODULE INSTALLATION (PMI)  .

There are 3 different methods that are used for module programming:

• programmable module installation
• calibration update
• programmable parameters

Some modules do not support all 3 methods.