Great Wall Florid. Manual - part 45

GWFLORID Maintenance Manual

178

Reverse Sensor

Reverse sensor operation (ultrasonic wave distance-measurement)

Sound is a kind of wave. Sound frequency that can be heard by human beings range from 20 Hz 

to 

20 KHz. 

Those that exceed 20 KHz are called ultrasonic waves. Since an ultrasonic wave is also a kind of sound, its 

velocity in the air also equals the sound velocity of 340 m/s. Part of the ultrasonic wave will rebound when it 

encounters an obstacle. So the distance between the sound source and the obstacle can be calculated according 

to the sonic speed and the time difference between the emission of sound and the receipt of sound.

Reverse sensor system composition

This system is composed of a reverse sensor head unit (ECU), four sensors (SENSOR) and an external buzzer.

Plug 

number

Definition

Remark

1

GND

Ground wire of the head unit's power supply

2

BUZZER -

Buzzer ground wire

3

DATA

Reserve display data wire

4

GND

Reserve buzzer ground wire

5

L (SENSOR)

Inductor signal wire (four inductors)

6

CL (SENSOR)

7

CR (SENSOR)

8

R (SENSOR)

9

GND

Inductor ground wire (four inductors)

10

GND

11

GND

12

GND

13

GND

14

VCC

Reserve display power wire

15

BUZZER +

Buzzer power wire

16

+ 12 V

Head unit power wire

Reverse power supply: 

Inductor  L 

Inductor  CL 

Inductor  CR 

Inductor  R 

Controller

Red (+) 

Black (-) 

179

Electrical Accessories

Functional description and display program

1.  This system will be activated within the first second after engaging the reverse gear. There will be two 

beeps indicating the system is working properly.

2.  After the self-check, it will start its normal detection mode. The relationship between the obstacle 

distance and the alarm frequency is as follows:

A Zone: When it is a long sounding alarm, the obstacle is within the distance of  (0

-

40±4) cm. 

B Zone: When the alarm frequency is an 8 Hz continuous sound, the obstacle is within the distance of 

(40±4

-

90±4) cm.

C Zone: When the alarm frequency is a 4 Hz intermittent sound, the obstacle is within the distance of (90±4

-

150±4) cm.

Areas of importance

1.  When placed near a car equipped with the same system or a similar system (having been activated) 

offered by other suppliers, though this system may receive interference, it can still operate normally.

2.  When the relative rate of travel between the obstacle and the car is lower than 1 m/s, this system will 

operate as normal. When reverse speed is accelerated, the sensing accuracy of the reverse system 

may decrease. A low speed of 6 km/h is suggested.

3.  When it is a long sounding alarm, please stop the car at once, because there may be an obstacle 

within 40cm.

4.  The inductor precision level is high. It will be very difficult to return it to normal after opening the inner 

portion.

5.  The reflected signal may not be received due to the location, angle, size, or material of the object.

Furthermore, the reflected signal in a complex environment may not be accurate.

System malfunction causes and solutions

1.  A lack of power or a low supply voltage may lead to the abnormal operation of the reverse sensor 

system. Under such circumstances, check whether the supply battery voltage is normal, or whether 

the ignition switch connector and other connections are accurately placed.

2.  If the power supply is on, irregular system operation may be caused by the incorrect position of the 

socket. Under such circumstances, correctly re-place all the sockets.

3.  A long sounding alarm from the buzzer may be caused by the inductor coming off, incorrect installa-

tion, damage to the inductor, or detecting the car or ground. Under such circumstances, please repair 

or replace the sensor.

4.  Incorrect indication of an obstacle's distance may be caused by abnormal battery voltage, inaccurate 

socket positioning, or inductor connection damage. At this time, check whether the battery voltage 

is normal, and whether the inductor connection is connected to the exhaust pipe and muffler. It is 

suggested that the system be turned off and all the sockets be correctly placed.

Reverse sensor system parameters

Rated operation voltage

DC 12 V

Operation voltage range

DC (9.6

-

16) V

Operation temperature range

-30

-

80 

o

C

Storage temperature range

-40

-

85 

o

C

Power consumption

< 2 W

Detect segment

3 segments: 150

-

90

-

40 cm

Maximum sensing distance

150±4 cm

Effective distance

(15±4) cm

- (

150±4) cm

Detect mode

Ultrasonic wave

C Zone 

(4 Hz intermittent sound)

40±4 cm                      90±4 cm                 150±4 cm 

A  Zone 

(long alarm) 

B  Zone 

(8 Hz continuous sound)

GWFLORID Maintenance Manual

180

Combination Meter

If something is wrong with the meter, check the relevant component and circuit according to the connector defi-

nition. If the failure still cannot be eliminated, check whether the instrument itself has malfunctioned in the fur-

ther steps. The following diagram shows the view of the meter connector and its number.

Pin definition of each combination meter

32-core connector

Pin No.

Function

Pin No.

Function

1

Meter ground

17

Signal ground

2

Speed signal input

18

Internal lighting (+)

3

Vehicle speed signal input

19

Airbag indicator lamp

4

Fuel gauge input

20

Door open warning lamp

5

Water temperature gauge input

21

Seat belt unfastened indicator lamp

6

Vehicle speed signal output

22

Battery

7

Central door lock signal

23

Ignition

8

Clock test

24

High beam (-)

9

Meter interior communication

25

High beam (+)

10

Empty

26

Right turn signal lamp

11

ABS failure indicator

27

Left turn signal lamp

12

Engine failure indicator

28

Charging indicator

13

Brake system failure indicator

29

Engine maintenance indicator

14

Oil pressure indicator

30

EBD indicator

15

Rear fog lamp indicator

31

O/D switch indicator

16

Parking brake indicator

32

Front fog lamp indicator

12-core connector

Pin No.

Function

Pin No.

Function

1

P position

7

Master lighting switch indicator

2

R position

8

Rear deforster indicator

3

N position

9

CAN H

4

D position

10

CAN L

5

2nd gear

11

Oil/water separator indicator

6

1st gear

12

Diesel engine preheating indicator

12-core connector

32-core connector

181

Electrical Accessories

Central Door Lock

1.  Lock

After closing the door (when unlocked), press the LOCK button once on the remote controller, the car lamp 

flashs once, and all five doors will be locked.

2.  Unlock

When locked, press the UNLOCK button once on the remote controller, the car lamp will flash twice, and all 

four front doors will be unlocked.

3.  Vehicle pager function

Press the LOCK button once on the remote controller while all the doors are closed and locked. The car lamp 

will then flash ten times. Press the UNLOCK button to exit the vehicle pager function. If the doors are not well 

closed and locked, then press the LOCK button once on the remote controller, in which case the lamps will not 

flash.

4.  Auto-defense function

While locked, press the UNLOCK button on the remote controller. If the doors are not open, it will automatically 

lock after 30s.

5.  Auto-close window function (jam protection window regulator)

(a)  Pull the key out and make sure all the doors are closed, then press the LOCK button on remote controller, 

the side windows will close after 1 second of negative output.

(b)  After pulling out the key, the sunroof will close after 60 seconds of negative output (reserve).

6.  Remote controller function suspension

When the key is inserted into the ignition lock, the remote controller will not work, but the head unit will work 

as normal.

7.  Manual lock and unlock

Locking or unlocking can be manually controlled.

8.  Deleting or registering remote learning functions of the remote controller

Step one: Under normal circumstances, open the front left door (do not close). Insert the key into the ignition 

lock, within five seconds, switch it ON and LOCK five times and stop it at the ON position the fifth time. The 

buzzer will sound once and the light will flash once. It is now in the learning state.

Step two: Press any key on the remote controller within 10 seconds, the buzzer will sound twice, and the light 

will flash twice. This is the first learning state. Press any key on another remote controller, it will sound twice, 

and the light will flash twice. Second learning successful (A total of four remote controllers can learn).

Step three: After successful learning, pull the key out (ON-LOCK) to exit the learning state. If no key is pressed 

within 10 seconds, the system will exit from the learning state automatically.

9.  Dome lamp delay function

(a)  Open the door and then close it, the lamp will light for 10 seconds. If the key is inserted into the ignition 

lock head or door lock within these 10 seconds, the lamp will gradually extinguish.

(b)  When the key is pulled out of the ignition lock head, the dome lamp will turn on. If the key is inserted into 

it again or the door is locked, the dome lamp will turn off gradually after one minute.

10. Alert function

(a)  If the key is inserted (low) and is not at the ON gear (high), when the front left door is opened (low), the 

buzzer will emit an intermittent chirp.

(b)  If the key is not inserted (low) and the lamplet is on (high), when the front left door is open (low), the 

buzzer will emit a long chirp.

11. Trunk door independent open function

(a)  After pressing the trunk lock striker of the remote controller and turning the trunk door switch on, the trunk 

door actuator will open (14th pin will output positive voltage), and then the trunk door can be opened. If 

the trunk door does not open after pressing the trunk lock striker for 60 seconds and then switching the 

trunk door on, then the trunk door actuator is unable to open (14th pin is not outputting positive voltage).

(b)  When the trunk lock striker of the remote controller is not pressed or the trunk door is not opened after 

pressing the button for 60 seconds, the trunk door actuator cannot be opened after switching the trunk door 

on (14th pin is not outputting positive voltage).