Installation Precautions - Motorola HSN4035 Service Instructions Manual

Anti-Lock Braking System (ABS) and
Anti-Skid Braking System Precautions
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W A R N I N G

Installation Precautions

Braking System Tests
Disruption of the anti-skid/anti-lock braking system by the radio
transmitter may result in unexpected vehicle motion.
Motorola recommends the following radio installation precautions
and vehicle braking system test procedures to ensure that the radio,
when transmitting, does not interfere with operation of the vehicle
braking system.
1. Always provide as much distance as possible between braking
modulator unit and radio, and between braking modulator unit
and radio antenna and associated antenna transmission line.
Before installing radio, determine location of braking modulator
unit in vehicle. Depending on make and model of vehicle,
braking modulator unit may be located in trunk, under
dashboard, in engine compartment, or in some other cargo area.
If you cannot determine location of braking modulator unit,
refer to vehicle service manual or contact a dealer for the
particular make of vehicle.
2. If braking modulator unit is located on left side of the vehicle,
install radio on right side of vehicle, and conversely.
3. Route all radio wiring including antenna transmission line as far
away as possible from braking modulator unit and associated
braking system wiring.
4. Never activate radio transmitter while vehicle is in motion and
vehicle trunk lid is open.
The following procedure checks for the most common types of
interference that may be caused to vehicle braking system by a radio
transmitter.
1. Run vehicle engine at idle speed and set vehicle transmission
selector to PARK. Release brake pedal completely and key radio
transmitter. Verify that there are no unusual effects (visual or
audible) to vehicle lights or other electrical equipment and
accessories while microphone is NOT being spoken into.
2. Repeat step 1. except do so while microphone IS being spoken
into.
3. Press vehicle brake pedal slightly just enough to light vehicle
brake light(s). Then repeat step 1. and step 2.
4. Press the vehicle brake pedal firmly and repeat step 1. and step 2.
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