Great Wall service chassis and body Manual

BE-38

Body Electric System

Backup Radar System

Inspection on Common Trouble

Failure Judgment Methods

No backup radar display (no

system start notification when

the reverse gear is engaged)

Check whether the plugging elements of power supply
of back up radar control box are in well connection as
shown in drawing H in next page.(when the reverse
gear is engaged, touch the detector, if there is vibration,
which shows the detector is powered.

Check whether the wire harness of inner mirror in
electric room and that on the top of body are in well
connection as shown in the drawing A in next page

Check whether the wire harness of back up radar
control box is well connected with that of chassis
and that on the top of body.

Rotate the vehicle key to the ACC position and
engage the reverse gear, then measure to see whether
the back up power supply reaches to 12 V with the
multi-meter of 50 V of voltage, refer to the

red

and black

positions shown in the drawing in next

page.

If the voltage reaches 12 V, change the backup
radar control box in trial firstly, then the inner
mirror in electric room, finally change the roof
wire harness and the chassis.

No backup radar display (but
there is start notification when
the reverse gear is engaged)
remark: such trouble occur
under the blocking condition.

Check whether the power supply of back up radar
is well located, see the red and position in the
drawing of next page.

Check and align the plugging element.

Poor properties of ultrasonic wave

Change the ultrasonic detector heads.

Continuous back up radar red

lamp alarming (remark: there

is no obstacle within 0.5 m away

from the detector head)

Check whether the detectors in the two circuit of
back up radar control box is well plugged, see the
marked positions F, G in the drawing of next page.

Check and well connect those plugging elements
Poor connection of the left/right ultrasonic detector head

Poor performance of back up radar control box.

Check and well connect those plugging elements

Change the ultrasonic detector head

Change the back up radar control box.

Vehicle model

Alarming by mistake

The rear standby tire is removed

Conduct the inspection operation for the rear
standby tire at the spacious place

fail to detect the obstacle

The detector head doesn

t work

Change the detector head

There is dirt on detector head

Clean the detector head

Rear standby tire inspection

1. engage the reverse gear for five times repeatedly within ten seconds at the spacious place so that the red

lamp on the screen flash three times, the system will automatically remember the standby tire status.

2. When the body height varies or the stand by tire is opened, make a new inspection for the rear stand by

tire to ensure the backup radar in normal operation.

Seven section of lamp display

Column I

1.49m-1.3m Column II1.29m-1.1m

Column III

1.09m-0.9m Column IV0.89m-0.75m

Column V

0.74m-0.6m column VI0.59m-0.45m

Column VII

0.45m

Remark: the right and left LED display the direction and distance of obstacle respectively for driver

reference.

If the voltage fails to reach 12 v, check the power
supply system of original vehicle

s large wires

to restore the voltage to 12 V.

Vehicle model

SL SK

fail to detect the obstacle

Trouble description

Repairing and treatment approaches

Great Wall service chassis and body Manual - part 77