Audiovox 1287391 User Manual

MODEL: ASH300

OBSTACLE SENSING SYSTEM

FOR

TRAILER HITCH MOUNTING

Owner/Installation Manual

IMPORTANT:

HITCHLOCK

KEY CODE

Place in owner’s glove box for future reference

A TTENTION: “REFER TO YOUR KEYS FOR CODE”
YOUR KEY CODE IS:

CUSTOMER SERVICE [phone]

-1-

Congratulations

Your purchase of the Hitch Mounted Wireless Reverse Obstacle Detection System will provide you with a state of
the art, highly sophisticated, ultrasonic obstacle detection device for your vehicle. It is manufactured to ISO
standards, and under normal circumstances requires little maintenance. Under no circumstances should you
attempt to open the Sensing Unit or RF Receiver. Doing so will void all manufacturer’s warranties. (Step weight
should be limited to less than 250 pounds or 110kgs.)

Kit Contents:

Y our Obstacle Detection Kit cont ains the following items:

(1) Sensing Unit, with 2-pin Power harness, (Fig.A)
(1) 7way Power Plug, with 18” 2-pin harness. (Fig.B)
(1) *Wireless RF Receiver. (Fig.C)
Factor Programmed to match A and C
(1) HitchLock with (2) keys. (Fig.D)
(2) Foam Stabilizers (Fig. F)

(2) Hitch Lock Spacers (Fig. G)

Fig.G

Fig.D

Fig.C

(1) 2 Pin Reverse Power Hard Wire Kit: (Fig.E)

(1) 2-pin plug with 9 foot wire harness
(2) 22-18awg Red ScotchLock
(6) 8” tie straps for securing wires
(1) inline mini blade fuse holder 2A
(2) spare blade fuses included
(2) butt splice red
(1) Installation Instruction Sheet

Fig.E

Fig.A

Fig.F

Fig.B

-2-

Understanding your Obstacle Detection System’s functions

Your system sends and receives Ultrasonic Signals that are projected from sensors mounted in the Sensing Unit.
As the signals “echo” off of objects in the detection field, and return to the sensors, the systems’s microprocessor
exports them to its onboard, output signal transmitter. These signals are transmitted through Radio Frequency
Waves to the Chime Module located in the vehicle. The detection signals are then translated into audible warnings
for the driver.

Your system will detect and notify the driver with 3 distinct “Tones” (beeps), which correspond with your vehicle’s
distance to objects in the detection zone. Upon engaging into reverse gear, you should hear 1 distinct tone. This
serves multiple functions:

1) Notification that the system is active and is scanning for objects in the detection field.

2) As a reminder that you have selected the reverse gear.

3) As an indication that your system has performed a self check. If more than one “quick beep” occurs
your system may need to be checked. If warning tones continue after reverse gear is initially selected, check for
obstacles behind the vehicle. If nothing is behind the vehicle refer to the troubleshooting guide.

Overview of your detection Zones and Notifications

“Zone1” Slow beeps and Slow Green flashing LED from the
wireless receiver.
“Zone2” Rapid beeps and Rapid Yellow flashing LED from the
wireless receiver.

Zone 3

Zone 2

0-3 feet 3-5 feet

Zone 1

5-7 feet

“Zone3” Solid tone and Solid Red LED from the wireless
receiver.

Wireless RF Receiver:
(A) Speaker
(B) Volume/LED Slider
(C) Visual Indicator LED
(D) Volume & Reprogram
Control

-3-

Understanding your Wireless Receiver

Your Wireless Receiver uses RF (radio frequency) technology to communicate with the control module. This
receiver plugs into a vehicle Cigarette lighter or other similar power source. The receiver features: (Fig A)
A) Internal Piezo speaker for efficient audio warning tones (beeps).
B) Slide cover to to adjust volume of speaker or to cover L.E.D. Cover slides front to back to either cover speaker
ports to lower volume levels, or to cover L.E.D if lighting is not desired.
C) Multi-color visual indicator L.E.D for Zone by Zone Visual alerts. The L.E.D colors include Green, Yellow, and
Red. See page 3 for Specifications and Relationship to “Zones”.
D) Reset style button access hole. Functions as the RF Receiver Hi/Lo volume toggle, and RF Receiver

programming port.

How to Adjust the V olume and Reprogram the RF Receiver

Your RF Receiver features a programming port. This port has two programming functions:
(1) Programming the RF Receiver to the sensing unit. (Normally Preset from Factory)
(2) Hi/Lo volume selector.

Hi/Lo Volume selection:

To change the Volume setting on the Receiver, the control module should be connected and
the vehicle “do not start the vehicle,” should be in the reverse gear with the parking brake
set. Using a Toothpick, or similar non-metal “probe”, insert into programming port and
press and release quickly.

* Programming: (Fig.B)

To program your receiver, an additional, or a replacement Receiver to the sensing unit, the
vehicle should be in the reverse gear, “do not start the vehicle,” with the parking brake set.
Using a Toothpick, or similar non-metal ”probe”, insert it into programming port and press
and hold for at least 5 seconds, then release. Upon releasing the reprogramming button,
you will hear one long confirmation chirp. After reprogramming, test the system by slowly
backing toward a large object that will be detected in each zone. If you still experience

problems, call [phone].

-4-

-

Troubleshooting

(For additional information, please contact your installation center.)

Symptom Remedy

No Function in Reverse Check power to receiver and transmitter

Reprogram Receiver
Check Fuse in Receiver
Check in-line fuse in Sensing Unit
Check 7-way harness
Check Ground Wire

Inconsistent Operation Refer to page 4 Reprogramming Wireless

Receiver.

Constant Tone in Reverse Always check for object behind vehicle

Make sure sensors are clean of debris

Care

To prevent power wire harness damage, remove Hitch Unit and unplug all power wires prior to driving through
automatic car washes.

Keep sensors clear of any solid mass or debris to maintain accurate performance.

-5-