Self-Diagnosis And Troubleshooting; Prior Examination; Self-Checking Function Check - Lifan 620 Maintenance Manual

(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)
(8) As shown in Fig. 4-114, when driving approaching the wall, warning mistake is caused by
inaccurate distance detecting
IV. Self-diagnosis and troubleshooting

1. Prior examination

(1) Position ignition switch to ON, position shift lever to reverse, make parking brake to guarantee
vehicle safety, check reverse radar system
(2) Switch on reverse indicator switch
(3) Move a cylinder object with 60mm diameter around the sensor, measure the sensor detection
range
(4) When detecting a barrier, check indicator and the warning condition of buzzer
A. When detection distance S is greater than 1.5m, no light in 3 sections.
B. When detection distance S is greater than 1m, and equal or less than 1.5m, light in outermost
layer. (Warning: time interval of 1s)
C. When detection distance S is greater than 0.5m, and equal or less than 1m, light in outer 2
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)
Test height: 528 + -10MM

2. Self-checking function check

(1) Check self-checking function of LCD indicator and buzzer: about 0.4s after turning ignition
switch to ON, positioning shift lever to reverse gear, check indicator and buzzer operation, the
operation time shall be 0.8±0.2s, now system is in normal testing operation.
(2) If the LCD indicator is not on or buzzer does not make sound as stipulated, wiring might be in
disconnection.
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Fig. 4-113
Fig. 4-114
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