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Two-inch gauges are identical in design and hardware with the exception of their scale-
plates. This allows any 2-inch gauge to serve a variety of functions simply by changing
its scaleplate. To reprogram a 2-inch gauge to a different function, simply attach the
appropriate scaleplate as shown in Figure 4-2.
To remove the Interface Module, follow the instructions in Figure 4-4.
1. Position the Interface Module in its mounting location and secure it using the
two fasteners. Do not tighten the mounting fasteners more than 32 inch-pounds.
2. Reconnect J3 and J4.
3. Reconnect the air vent hose and the vacuum/pressure hoses to the Interface
Module as specified by the vehicle manufacturer.
The Interface Module must be told which pressure gauges are present at ports 5A
and 5B, and what kind of transmission is installed in the vehicle. This is done using
the HDT as described in Chapter 6. In addition, the Interface Module must be repro-
grammed whenever it is replaced.
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