Module Programming Methods: Notes

Some modules must be programmed as part of a repair procedure. If this procedure is not followed the module will not function correctly and may set a number of diagnostic trouble codes (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 WDS automatically attempts 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 the information, the diagnostic tool either requests "As Built" data or displays a list of items that you need to manually configure. The diagnostic tool programs the module based on the data you enter.

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

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

• programmable module installation (PMI)
• calibration update
• programmable parameters

Some modules do not support all 3 methods.