Two slots in the Tech 1 base accommodate software cartridges. The lower slot is for the master cartridge; the upper slot is for auxiliary cartridges.
Master Cartridge
A vehicle may be equipped with several on-board microprocessors, in addition to the PCM. These could include an ABS module, a body control module, or a diagnostic energy reserve module for air bag systems. The Tech 1 can work with these different control modules by using software cartridges specific to the system in question.
Prior to 1993, master cartridges were issued that covered several model years of each separate system. In 1993, the Mass Storage Cartridge (MSC) was introduced. The MSC covers numerous systems and model years. It is also more versatile.
Its information can be updated by being erased and/or written over. This is accomplishable on-site at the dealership with the proper equipment.
Auxiliary Cartridges
Auxiliary cartridges are also available. These extend the functions of the Tech 1. Special function cartridges allow you to take measurements from sources other than the DLC. Or, they allow you to connect the Tech 1 to a printer or monitor.
