The MHF-R330BT(4CH) parking sensors use the principle of distance measurement and fuzzy logic. As the vehicle is slowing backing up, the ultrasonic system detects obstacles located behind the vehicle and warns the driver via clear audio and visual signals, who is then able to avoid the obstacles.

Installation on the Parking Sensors

This manual is intended to explain the safe and correct use of the product. Please read this manual carefully before use. 

Product Overview

The Parking Sensor helps the driver view the rear of the vehicle.  
It helps prevent collisions andaccidents during any backward movement of the vehicle.
If there is an obstacle at the rear of the car, the alarm inside the vehicle displays the distance to the obstacle and generates a signal proportional to it.

Features of the Product

- Enables safe backward movement by detecting obstacles in the rear.
- Insures a safe distance in the event of snow, rain, frost or fog.
- Insures a safe distance between an obstacle and the rear of the vehicle while parking and stopping.
- Easily installed and semi-permanent.
- Good sensor designs which matches the vehicle.
- Displays the distance to the obstacle from the back of the vehicle while backing-up within 0.4m.
- Informs the driver of the proximity of obstacles on the left and right sides of the vehicle.
- Generates a four-level alarm signal depending on the distance to the obstacle.

Method of Operation

The Parking System of ModooFree Plus BT(MHF-R330BT);
1. The parking system will be started to operate after displaying E.1 ~ E.4 whenever put the
     reversing gear.
2. When the sensors detect any obstacles within the first detection area(2.0~1.0M), the distance
    will be displaying on the indicator without beep sound.
3. When the distance will be getting closer, the LED digits will be displaying by each 0.1M unit.
4. The beep sound level will be changed by distances from the second detection area(0.9M)
5. Within 20cm distance, the LED digits will be displaying on ( - . P ) and the beep sound will be
    warning continuously.
6. It can be recognized on the location of the obstacle by right & left indicators by the side of
    LED digits.

Product Constituents

 Part Description

 Specification

Installation and Connection of Lines

 1) Diagram for Main Contents

 2) MHF-R330BT (4CH) Display Installation

 3) Connection of Display Cable

Connect the display cable to the top connector of the display.   
Insert the cable between the front window and the ceiling cover.  
Install it through the upper part of the car door to the trunk.

 4) Control Box

Mount the control box on the side of the trunk with bolts.

Note :  The control box is not waterproof. Therefore, exposure water and moisture should be avoided.
            Do not install it on a metal surface.

 5) Sensor

      1) Installation

 Note :  A/S is not provided when the device is damaged due to the cutting of detector cables
             (Do not cut them). On the other hand, extending or cutting the display cable for proper
             use is acceptable.

       2) How to affix

          * Refer to the below pictures for the inclination angle of the bumper.

       3) Position

 1. For the bumper types in pictures 1 & picture 2 - Put the thin part (△) of the sensors up.
 2. For facing bumper type in picture 3 - Put the thin part (△) of the sensors facing down.

      4) Sensor hole

1. For the bumper types in picture 1, picture 2 - Put the thin part (△) of the sensors up.
2. For facing bumper type in picture 3 - Put the thin part (△) of the sensors facing down.

    5) Connecting the detector

        (1) Connect sensors to the control box as indicated.
        (2) For the ModooFree PLUS BT 4CH model, after checking the right and left LED displays,
              connect sensors to the control box to avoid reversing the display’s direction.
        (3) Arrange the lines with cable ties.

Connection of Power Cable to The Reverse Light

Open the reverse light signal lamp, and find the light wires. In general, a red wire is positive and black one is negative. Use the line connector to connect the positive wire of the reverse light to the red power cable, and the negative wire of the reverse light to the black power cable.

① Line connector
② Insert the positive (or negative) wire of the reverse light through the outside hole of the line
    connector.  Press the metal connector down gently.
③ Insert the positive (or negative) power line into the inside hole (blocked side).
    Press the metal connector down.
④ Press the metal connector down fully with pliers.
⑤ Cover the line connector.

Operating Test

Detection Range

   Note :  - 10cm (diameter) X 120cm (length) PVC pipe was used at 18°C for the detection range test.
                - Small objects result in a reduced detection range.  Be careful.
                - Detection range can change according to weather conditions.

Function of Detectors

Detectors indicate the distance from the closest object by LED display

    Note :  1, 2, 3, 4 are indicated on the sensor jacks with stickers.
                1, 2, 3, 4 are indicated on the cover of the control box.

    Note :  The detectors’ measuring of the direct distance may cause create a discrepancy between
                 the displayed distance and the actual distance from a vehicle to an object.
                 (2.0 = detection display from 29cm)
                 Incorrect readings can be caused by unusual circumstances.

Caution

Avoid the below situations which may result in malfunction.
1. Undetectable objects : Thin objects like wire, rope, lines, wire entanglements and so on.
                                         Supersonic wave absorbers like cotton, sponge, snow and so on.
2. Factors that may cause incorrect readings.
     - Reversing on uneven or gravel roads, hills, sidewalks or in forests.
     - Frost on the sensors.
     - Snow or soil covering the surface of the sensors.
     - Strong electrical fields around the car.
     - Raindrops.

The reverse speed of vehicle must be less than 5km/h for safety. Do not be over-reliant on this device. This is only a supporting device for driving safety, check with your eyes first.

Troubleshooting