Engine JAC HFC4DA1-2C. Manual — part 78

PT

PT

PT

PT Reversing

Reversing

Reversing

Reversing parking

parking

parking

parking assistance

assistance

assistance

assistance system

system

system

system

- 102 -

Instruction

Instruction

Instruction

Instruction and

and

and

and Operation

Operation

Operation

Operation

Reversing

Reversing

Reversing

Reversing radar

radar

radar

radar sensor

sensor

sensor

sensor

There are 4 sensor probes for Sunray reversing radar. With the application of ultrasonic sensor, the distance
measurement of the obstacle and the vehicle can be carried out. In the process of reversing, the buzzer plays a role in
supporting reminding for the driver via beeps with different frequencies.

Mounting

Mounting

Mounting

Mounting position

position

position

position of

of

of

of the

the

the

the reversing

reversing

reversing

reversing radar

radar

radar

radar sensor:

sensor:

sensor:

sensor:

The reversing radar computer is mounted on the rear bumper.

PT

PT

PT

PT Reversing

Reversing

Reversing

Reversing parking

parking

parking

parking assistance

assistance

assistance

assistance system

system

system

system

- 103 -

Instruction

Instruction

Instruction

Instruction and

and

and

and Operation

Operation

Operation

Operation

Operating

Operating

Operating

Operating principle

principle

principle

principle of

of

of

of the

the

the

the reversing

reversing

reversing

reversing radar

radar

radar

radar

1.

Schematic diagram of reversing radar system

2.

Schematic

diagram

of

ultrasonic

distance

measurement

3.

The reversing radar controller sends ultrasonic
signals to the sensor in order to drive the sensor for
ultrasonic wave generation; Ultrasonic signals are
received by the sensor via obstacle reflection and
the internal circuit of the sensor amplifies the
reflected signals and sends them to the controller.
After analysis and calculation of the controller, the
distance information of obstacle is processed by the
controller and the buzzer is driven to beep. For
obstacles at different distances from the vehicle,
the buzzer is controlled by the controller to beep in
different frequencies thus to remind the driver of
obstacles.

4.

Factors which may affect the operation of reversing
radar:

�

Temperature

�

Air pressure

�

Humidity

Sensor

Sensor

Sensor

Sensor

Buzzer

Controller

assembly

Display (reserved)

O

b

st

ac

le

PT

PT

PT

PT Reversing

Reversing

Reversing

Reversing parking

parking

parking

parking assistance

assistance

assistance

assistance system

system

system

system

- 104 -

Diagnosis

Diagnosis

Diagnosis

Diagnosis and

and

and

and Test

Test

Test

Test

Definitions

Definitions

Definitions

Definitions of

of

of

of reversing

reversing

reversing

reversing radar

radar

radar

radar computer

computer

computer

computer pins

pins

pins

pins

1.

Control logic

In the case of no fault in sensor, the buzzer 2HZ beeps once; in the case of one or more faulted sensors, the buzzer 2HZ beeps twice and
then turns into normal distance measurement.

Distance

0-30

﹥30-60

﹥60-90

﹥90-180

﹥180

Beeping frequency of the buzzer

ON

8HZ

4 HZ

2 HZ

OFF

2.

Definitions of control module interfaces

Connector figure

Pin

Signal name

Function

1

R-SHIFT

Reversing signal

2

NC

3

NC

4

S-CR

Right intermediate

probe

5

NC

6

NC

7

S-L

Left probe

8

S-CL

Left intermediate

probe

9

NC

10

NC

11

NC

12

NC

13

DATA

Data display

14

Buzzer

Control signal of

buzzer

15

S-R

Right probe

16

GND

Ground

3.

Probe interfaces

Connector figure

Pin

Current

Function

1

0.1

Power supply

2

0.1

Ground

PT

PT

PT

PT Reversing

Reversing

Reversing

Reversing parking

parking

parking

parking assistance

assistance

assistance

assistance system

system

system

system

- 105 -

Diagnosis

Diagnosis

Diagnosis

Diagnosis and

and

and

and Test

Test

Test

Test

Definitions

Definitions

Definitions

Definitions of

of

of

of reversing

reversing

reversing

reversing radar

radar

radar

radar computer

computer

computer

computer pins

pins

pins

pins（continued

continued

continued

continued）

4.

Buzzer connectors

Connector figure

Pin

Current

Function

1

0.1

Ground

2

0.1

Power supply