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Identifying the Vehicle Application
NOTE
The vehicle/equipment manufacturers have no obligation to inform Syn-Tech Systems of changes
they make to their products. Consequently, it is very possible new vehicles or equipment may
incorporate changes unknown to Syn-Tech Systems which are not compatible with AIM2™. If you
find changes incompatible with AIM2™, inform Syn-Tech’s Customer Satisfaction Center or your
FuelMaster
®
representative (regional sales manager or distributor) and every effort will be made to
make AIM2™ operable with the changes.
Light duty general purpose vehicles (sedans, vans, pickups) manufactured since 1996 have an OBD
II (2
nd
generation on-board diagnostic) port. Heavy duty vehicles with on-board diagnostics have a
different protocol resulting in a different type connector. The connector style will determine the cable
necessary to connect the AIM2™ module to the vehicle. The cable provided must plug into one of the
connectors illustrated in Figure 3-3. These vehicles power the AIM2™ module through this diagnostic
connection.
Some heavy duty vehicles may have multiple data ports. To determine which port to use, connect a
compatible cable between the data port and the AIM2™ module. A yellow OBD Connect light will
illuminate when an active port is connected, and the vehicle ignition is switched on.
Heavy Duty
J1939
9-Pin;
Use
244066
Cable
Heavy Duty
J1708
6-Pin;
Use
244058
Cable
Light Duty
With
Pass-Thru;
Use
243256A
Cable
Figure 3-3. OBD Connectors
Most vehicles manufactured prior to 1996, and other vehicles which do not have computers, may
require AIM2™ connection to an analog speed sensor or chronometer to recover vehicle mileage or
operating hours. Some vehicles with computers may also have cable driven speedometers. If a
speed sensor or chronometer is not installed, it may be provided with the purchase of the other
AIM2™ equipment. Connection through a speed sensor or chronometer requires a connection to an
external power source. AIM2™ may be powered by any power source from 12 to 42 VDC. Two
connections are required: one to an unswitched power source, and another to a switched power
source powered through the ignition switch.
The AIM2™ module need not be heated for protection from the cold, but it must be installed where it
will not be exposed directly to the weather. It is not weatherproof. If the vehicle requires the AIM2™
module to be installed inside a metal box for protection from the weather, an external antenna should
be considered. AIM2™ modules are available with an external antenna connector, and external
antennas are available through Syn-Tech Systems to function with the AIM2™ module in closed
mounting applications.
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