11.14 Reverse Radar

11.14.1 Specifications
11.14.1.1 Fastener Tightening Specifications

Applications

Model

Specifications

Metric (Nm)

US English (lb-ft)

Reverse Radar Module Retaining Bolts

M6 × 16

8-11

6-8

Body Electric

Reverse Radar

11-461

11.14.2 Description and Operation
11.14.2.1 Description and Operation

1. When  reversing  (speed  less  than  5  km/h),  reverse  radar

system  detects  the  distance  between  obstacles  and  the
vehicle  and  sends  out  corresponding  alarm  signals  to
ensure the parking safety. However, the obstacles within
30 cm to rear bumper (11.8 in) are not guaranteed to be
detected.

2. Reverse  sensor  control  unit  converts  the  signal  traveling

time  from  the  sensor  to  the  obstacle,  and  then  from  the
obstacle  to  the  sensor  signal  to  determine  the  obstacle
distance.

3. Reverse  radar  system  consists  of  sensors  on  the  rear

bumper, a control unit and a built-in buzzer in the instrument
cluster.

Note

1. According  to  the  distance  to  obstacles,  the  system

can  give  the  driver  the  corresponding  alarm  signal
(buzzer) and thus provide confidence for the driver
safe  parking,  but  this  process  does  not  mean  that
careless  parking,  or  the  driver  can  avoid  parking
failures.

2. This system's ability to detect distance and obstacles

is limited, the driver must be careful when th obstacle
is not detected. In particular, when driving across the
obstacles,  the  driver  can  not  solely  rely  on  the
system.

11.14.2.2 Alert Tone Level

Detect 
Distance
(cm/in)

Distance 
Error
(cm/in)

Alarm
(+/-10%)

65 ms

65 ms

195 ms

FE11-1201b

11-462

Reverse Radar

Body Electric

11.14.2.3 Detection Area

Vertical Distance

Horizontal Distance

FE11-1202b

For the reversing radar system, when the reversing speed is
less than 5 km/h, the detection area is a straight line from the
rear bumper 140 cm (55 in), the corner distance is 60 cm (24
in).

Body Electric

Reverse Radar

11-463

11.14.3 System Working Principle
11.14.3.1  Reverse  Radar  Control  Unit
Functions

–

Produce TX Signal To Drive The Sensor Work

–

Receive The RX Signal From The Obstacle

–

Compare The RX Signal With The Reference Level

–

Send  Alarm  According  To  The  Detected  Obstacles
Distance

–

Sensor Fault Diagnosis

–

Drive Buzzer Alarm

–

Provide Sensor Drive Voltage

11.14.3.2 Sensor-Driven Sequence

Five-Step Cycle:

Left Corner Sensor=Left Corner Sensor;

Left Middle Sensor=Left Middle Sensor;

Right Middle Sensor=Right Middle Sensor;

Right Corner Sensor=Right Corner Sensor;

Right Middle Sensor=Right Middle Sensor.

11.14.3.3 Reverse Radar Display

Reverse radar indicator in the instrument cluster is on the LCD
lower  half  right  side.  When  reversing,  the  reverse  radar
indicator blinks with 1Hz frequency on the LCD.

km

ODO

FE11-1204b

Reverse radar sign and odometer sign share a car icon on the
LCD.  Displaying  the  reverse  radar  and  the  odometer  have
conflict. When reverse radar is displayed, the odometer display
will be temporarily unavailable, as shown above. This principle
also applies to travel time and reverse radar conflict.

FE11-1205b

km

km

ODO

When reversing, if the the middle row does not display the time
or odometer, then there is no conflict, the middle row displays
the normal value, as shown above.

11.14.3.4 Buzzer Driver

Buzzer  is  integrated  within  the  instrument  cluster,  and
connected to the reverse radar control module through cable.

11-464

Reverse Radar

Body Electric