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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