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Troubleshooting (for LED System, F2R4L , F4R4L)
Problem Cause
Solution
Display doesn't
light up when
reversing or
parking forward
with braking
1. Display not plugged in.
2. No power to the control box.
3.
Faulty display.
1. Check display connection.
2. Check control box power connections to see
if: Black wire is grounded properly,
Red wire gets +12V from ACC or ignition,
Yellow wire gets +12V from reverse light,
Blue wire gets +12V from brake light.
3. Replace the display.
Display light up
but system is not
detecting any
obstacle
Sensors not connected.
Faulty display.
Faulty control box.
Check sensor connections.
Replace the display.
Replace the control box..
System showing
distance but no
beeping or
system beeping
but no distance
display
Beeper switched off.
Faulty display.
Faulty control box.
Switch on the beeper (switch on back of the
display).
Replace the display.
Replace the Control Box.
System is not
detecting any
obstacle in front
System has no +12V from brake light.
Make sure the blue wire gets +12V from brake
light.
System is not
detecting any
obstacle in rear
System has no +12V from reverse light.
Make sure the yellow wire gets +12V from
reverse light.
Wrong LEDs light
up
Sensors are plugged into the wrong
sockets at the control box
Install the sensors in the bumper as labeled in
Fig. 1 & 2 and plug sensors as labeled on the
sensor wires into their corresponding sockets at
the control box (Fig. 4)
Display
constantly shows
0.0 or beeps
continuously
1. Object within 1 ft is detected.
2. Holes drilled for sensors are too tight
(especially if it is a metal bumper).
3. Faulty sensor(s).
4. Faulty control box.
1. Unplug all sensors, and then plug back in one
sensor at a time to find out which sensor is
causing the problem. Check if anything within
1 ft of the sensor may be detected. Adjust
angle of the sensor. Refer to
5. Installing the
Sensors
for details.
2. Carefully enlarging sensor holes a little with a
small round file.
3. Replace the sensors(s).
4.
Replace the control box.
Display shows a
distance and
beeps even there
is no obstacle
behind or in front
1. Ground is detected. Sensors angle is
low. Sensors installed too low
(mounting height below 1.6ft).
2.
Holes drilled for sensors are too tight
(especially for a metal bumper).
1. Unplug all sensors, and then plug back in one
sensor at a time to find out which sensor is
causing the problem. Adjust angle of the
sensor. Refer to
5. Installing the Sensors
for details.
2.
Carefully enlarging sensor holes a little with a
small round file.
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HY Technologies
Milpitas
California
USA
http://parkingsensors.net
