ceiver will excite the transponder, which is located (but not visible) in the head of the ignition key. The key transponder will then send a unique code back to the transceiver for evaluation. If the code matches a valid code of the system, the vehicle will be allowed to start. Most of these transponder-based systems can be bypassed using p/n 555U or 556U. Some may require additional parts from the vehicle manufacturer. Consult you dealer for the applications. For most Ford PATS transponders, p/n 555U or 556U can be used, except for the following vehi- cles, which will require p/n 555U or 556U: ‘97 and newer Mark VII, and 2000 and newer Taurus/Sable, Contour/Mystique and Focus.
plug-in LED and valet/program switch
These plug into the module. The Status LED plugs into the small two-pin socket, while the Valet® /Program Switch should be plugged into the larger blue two-pin connector. The Status LED fits into a 9/32-inch hole.
Status LED | | Valet®/Program Switch |
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DIA-41
programmer interface, 3-pin black plug
The black 3-pin port is provided for programming of the unit. The unit can also be programmed using the ProSecurity Programmer. When using the ProSecurity Programmer, it is possible to configure any and all of the programmable functions as well as lock the Transmitter/Receiver and System Features Learn Routines so that unauthorized users cannot change the configuration or program transmitters to the unit.
When the learn routines have previously been programmed using the ProSecurity Programmer, they may have
been locked. Before proceeding with reprogramming the learn routines, they must be unlocked with the ProSecurity Programmer - this cannot be done manually with the Valet switch.
