Lifan 620. Manual — part 65

Section VIII Reverse Radar System

I. Overview

(warning: time interval of 1s);

c. When detection distance S is greater than 0.5m and equal and less than 1m, light in 2 outer
layers: (warning: time interval of 0.5s);
d. When detection distance S is less than 0.5m, light in all 3 layers: (warning: constant
warning).
3. System components:
(1) Reverse radar (2) Reverse probe (3) Reverse indicator (on automatic panel)

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II. Reverse radar system terminal:

See Fig. 4-111 and Table 4-22.

1Ω

BCM (2-23) - body

R/W

Ultrasonic probe 2 signal

wire

BCM sends out starting

signal

Pulse signal

generated

BCM (2-24) - body

Y/R

Ultrasonic probe 3 signal

wire

When probe works after

BCM sends out starting

signal

Pulse signal

generated

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Check circuit

as shown in Fig. 4-112

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(6) Sensor is hit or knocked heavily
(7) Vehicle is close to stairs too much, system can not correctly detect the distance between
bottom stair and the vehicle rear, causing damage on rear mudguard (Fig. 4-113)

Fig. 4-113

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