11.13.5 Electrical schematic diagram 

11.13.5.1 Electrical schematic diagram 

NL11-2999b

左侧传感器

摄像头

中间传感器

右侧传感器

倒车开关

倒

车

雷

达

模

块

组

合

仪

表

导

航

仪

 

11.13.5.2 Parking motor control module terminal list 

1

2

3

4

5

6

7

8

SO32 倒车雷达控制模块线束连接器

NL11-3000b

 

 

Left side 

sensor 

Intermediate 

sensor 

Rightsensor

Reverse 

switch 

 
 
 
 
 
 
 
 

Reverse radar 

module 

Camera 

 
 

Navigator 

 
 
 

Combination 

instrument 

SO32 reverse radar control module harness 

connector 

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Terminal 

No . 

Signal 

type 

Description 

Terminal 

No . 

Signal type 

Description 

1 

IGN 

Ignition signal 

17 

GND 

Power ground 

2 NC No 

Connect 18 

KEY-IN 

Key Input (active for 

reserved 12V high 

level) 

3 

Speed IN

Speed pulse signal

19 

NC 

No Connect 

4 

R-DANG

Reversing signal 

20 

NC 

No Connect 

5 

P-DANG

Parking signal 

21 

NC 

No Connect 

6 Data 

Out

Standard serial 

port signal (0-12V)

22 NC  No 

Connect 

7 

NC 

No Connect 

23 

NC 

No Connect 

8 

R Sensor

Right rear sensor 

24 

NC 

No Connect 

9 

NC 

No Connect 

25 

NC 

No Connect 

10 C 

Sensor

Rear intermediate 

sensor 

26 NC  No 

Connect 

11 

NC 

No Connect 

27 

NC 

No Connect 

12 

NC 

No Connect 

28 

NC 

No Connect 

13 

L Sensor

Rear left sensor 

29 

NC 

No Connect 

14 

FR Sensor

Front right sensor

30 

NC 

No Connect 

15 

NC 

No Connect 

31 

PGND 

Sensor grounding 

16 

FL Sensor

Front left sensor 

32 

SEN POWER

Sensor +8V power 

supply 

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11.13.6 Diagnostic information and procedures 

11.13.6.1 Diagnosis descriptions 

Refer to 11.13.2 Description and Operation, get familiar with the system functions and operation 
before starting system diagnosis, so that it will help to determine the correct diagnostic steps, more 
importantly, it will also help to determine whether the situation described by the customer is 
normal. 

11.13.6.2 Visual inspection 

– 

Inspect the after-sales optional device which may affect the normal operation of parking 
radar system. 

– 

Inspect components easy to access system to identify whether there is a significant damage 
that may lead to the fault. 

– 

Inspect the installation of parking radar control unit and whether the wire harness connector 
is installed properly. 

11.13.6.3 Sensor fault diagnosis 

Starting for self-checking 

Head unit energized automatically detects whether the system function is normal; the system 
energized delays for about 0.6s, with self-check for about 0.2s; if all sensors have no failure, 
self-check data of about 0.5 s is sent to the dashboard, with data packet interval of 0.1s, all 
indicator lamps turn on for 0.5s after the reception of the dashboard, meanwhile, the buzzer beeps 
for 0.5s; there is sensor in five sensors damaged or in poor contact, the self-check data of about 2s 
is sent to the dashboard, with data packet interval of 0.1s; the indicator lamp corresponding to the 
fault sensor turns on for 2s after the reception of the dashboard, and meanwhile, the buzzer beeps 
for 2s. 

Fault figure 

 

Sensorfault 

If electrified, the rear sensor works normally, as 

shown in the figure, the "logistics trolley" body 

displays to prompt "sensor fault" in Chinese. 

Rear left sensor direction indicator lamp turns 

on for 2s; at the same time, the buzzer beeps for 

2s, which indicates left sensor error. 

 

Good-working

 

If electrified, 5 sensors work normally, as 

shown in the figure, the "logistics trolley" body 

displays to prompt "normal operation" in 

Chinese; all sensor indicator lamps turn on for 

0.5s; meanwhile, the buzzer beeps for 0.5s, 

which indicates all sensor normally work. 

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Radar communication fault

 

If the body harness or the reverse radar system 

is damaged to cause that the dashboard can not 

receive the data from the reverse radar system, 

display as shown in the left figure: in this state, 

the "logistics trolley" body displays "radar 

communication failure" in Chinese; and five 

sensor indicator lamps do not display. 

Reasons for System may be not work [properly 

1.  When external decoration outside sensor is frozen. 

2.  Sensor surface has snow or water drips, etc. 

Reasons for Sensor detecting ability may drop 

1.  When snow or water drops into the probe of sensor. 

2.  Under extreme hot or cold weather. 

3.  Obstacle diameter is less than 14cm(5.5in) and length is less than 1m(39in)。 

11.13.6.6 Possible reason of error warming for system 

1.  On unflat road, pebble road and grass road. 

2.  System is near other ultrasonic wave source, such as vehicle horn, motorcycle engine noise, 

commercial vehicle air brake interference, etc. 

3.  Heavy rain and splashing water. 

4.  Approach such radio equipment as walkman, etc. 

5.  When the sensor is covered by snow. 

11.13.6.7 System can not detect the object as follow 

1.  Object with sharp angle .rope and so on 

2.  It can absorb ultrasonic wave matters, such as cotton, snow and sponge, etc. 

11.13.6.8 Condition may be occur 

1.  According to vehicle speed and shape of barrier, warning level may be incontinuous. 

2 

Whne height of sensor and rear bumper changes or vehicle loading article is located on 
detection area, system may send error warning. 

3.  Attention should be paid that the system can't detect metter which is more than 30cm (11.8in) 

away from sensor. 

4.  When sensor error is detected, inspect whether there is dust, snow and water, etc. on the 

surface of sensor, if yes, remove dust, snow and water from the surface. 

5.  Avoid the sensor surface from being compressed, impacted and scratched. 

6.  Inform another user of this vehicle lent to him of these instructions. 

11.13.6.9 Possible cause for visual back-up system unworn 

1.  No core navigation damaged or part damaged (video module damaged, incapable of 

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