Jamar RAC Plus I, User Manual

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1-3
How does it work?
The RAC Plus I is installed in your car along with a
distance sensor
.
Distance sensors do the behind-the-scenes work of the RAC Plus distance
measuring instruments. Connected between your vehicle and the RAC Plus
head unit, these sensors read and modify the data coming from your vehicle
and send a signal to the RAC telling it when to count distance.
There are currently three types of distance sensors that are used with the
RAC Plus I – the AutoLink OBD sensor, the modular sensor and the mag-
nectic sensor.
Why are there three types? Because distance measuring instruments are
used by a wide variety of customers who often have different needs and in
a wide variety of vehicles that don't all work the same.
The simple breakdown of the three is that the AutoLink sensor is the new-
est and easiest to install (plug and play, no tools required), but that ease of
install trades a degree of accuracy. The magnetic sensor is the most precise,
but much more intensive to install than the AutoLink, while the modular
sensor has accuracy similar to that of the magnetic sensor and is somewhat
easier to install, but is not compatible with all vehicles.
The next chapter details how to install these various sensors into your
vehicle. If your already have a sensor installed, you may skip to Chapter 3
for information on calibrating your RAC.
Chapter 1 — Introduction to the RAC Plus I