BE-38Body Electric SystemBackup 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 modelpc
Alarming by mistake
The rear standby tire is removedConduct the inspection operation for the rear
standby tire at the spacious place
fail to detect the obstacle
The detector head doesnt workChange the detector head
There is dirt on detector headClean the detector head
Rear standby tire inspection1. 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 I1.49m-1.3m Column II1.29m-1.1m
Column III1.09m-0.9m Column IV0.89m-0.75m
Column V0.74m-0.6m column VI0.59m-0.45m
Column VII0.45m
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 vehicles large wires
to restore the voltage to 12 V.
Vehicle model SL SK
fail to detect the obstacle
Trouble description Repairing and treatment approaches
BE-68Body Electric SystemWire Harness Distribution
Housing wire harness
1 back-up lamp switch
2 starter
3 starter
4 oil pressure sensor
5 grounding wire
6 grounding wire
7 connected to protective box II
8 protective box II
9 connected to protective box II
10 starter11 air-conditioner compressor12water temperature sensor
13 washer motor
14 right headlamp
15 right lever-shaped lamp
16 electric horn
17 generator
18 left headlamp
19 left lever-shaped lamp
20 front turn lamp of left side
21 connected to protective box I
1
2
P
4 5 6 7
8
V
1011
12
13
14
NR1617
18
192021
Wire harness distribution
aê
BE-69
SL SK SY SJ
1 connected to cab wire harness
2 connected to cab wire harness
3 odometer sensor
4 back-up lamp switch
5 turn lamp on right side
6 grounding wire
7 brush motor
8 protective box II
9 wire connecting with accumulator anode
10 wire connecting with accumulator anode
11 electromagnetic fan
12 washer motor
13 right fog lamp
14 right turn lamp
15 right headlamp
16 right small lamp17 horn electric horn
18 left turn lamp
19 left small lamp
20 left headlamp
21 left fog lamp
22 pressure switch of air-conditioner
23 generator
24 generator
25 grounding wire
26 turn lamp on left side
27 brake liquid level sensor
28 connected to cab wire harness
29 connected to cab wire harness
30 connected to cab wire harness
31 flasher relay
1
O
3
4
5
6
7
8
9
10
11
12
13
14
151617
18
19
20 21222324252627282930
31
Housing wire harness (continued)
Body Electric SystemWire Harness Distribution
BE-70
SF
1
2 P
4 5 6
7
8 9 10
11 12 13
14
15 16 1718 19
20
21
22
23
2425262728
29
30 3132
33
34
3536
37
38
39
40
41
42
43
44 45 46 47
48
49 50 51
52
53
54
555657 5859
Housing wire harness (continued)
60 61
1 left door lamp switch
2 defrost switch at tail door
3 window regulator at tail door
4 parking brake switch
5 ignition lock
6 combined switch
7 instrument
8 combined switch shell
9 grounding wire
10 amplifying plate of air-conditioner
11 heat-sensitive resistance
12 control panel of air-conditioner
13 A/C Switch
14 glove-box lamp switch
15 glove-box lamp
16 speed-adjusting resistance
17 blower
18 indoor temperature sensor
19 right front loudspeaker
20 brush motor
21 turn lamp on right side22 electric fan relay
23 maxi-fuse
24 joint of wire harness at right front door
25 right front door lamp switch
26 right electric back-up mirror
27 grounding wire
28 rear sound box wire
29 ashtray lamp
30 CD Device wire
31 cigarette lighter A
32 cigarette lighter B
33 dual flasher switch
34 fog lamp switch
35 temperature indicator
36 stop lamp switch
37 brake liquid level sensor
38 control case of central control lock
39 left front loudspeaker
40 automatic aerial
41 turn lamp on left side
42 generator43 left front conner lamp
44 left front lever-shaped lamp
45 front fog lamp
46 left headlamp
47 temperature control switch
48 connected to wire of 220
49 spraying motor A
50 spraying motor B
51 right front conner lamp
52 right headlamp
53 horn A
54 horn B
55 right front lever-shaped lamp
56 right front fog lamp
57 electric fan
58 outdoor temperature sensor
59 connected to chassis wire harness
anright central wire harness
60 connected to left central wire harness
61 connected to engine wire harness
Body Electric SystemWire Harness Distribution
BE-71
Cab wire harness
aê
1 right front turn lamp
2 outdoor temperature sensor
3 right lever-shaped lamp
4 front fog lamp
5 horn
6 accumulator wire of 220V
7 electromagnetic fan
8 temperature control switch
9 protective box II
10 turn signal lamp on right side
11 brush motor
12 plug of engine wire harness
13 wire harness at right rear door
14 plug of frame wire harness
15 door lamp switch
16 wire harness at right front door
17 door lamp
18 right external electric rear vision mirror
19 protective box III
20 indoor temperature sensor
21 right loudspeaker22 speed-adjusting resistance
23 air blower
24 grounding wire
25 A/C switch
26 controlling element
27 ashtray lamp
28 receiver wire
29 cigarette lighter
30 cigarette lighter
31 rear sound box wire
32 amplifying plate of air-conditioner
33 grounding wire
34 heat-sensitive resistance
35 dual flasher switch
36 fog lamp switch
37 temperature indicator
38 combined switch shell lamp
39 combined switch
40 ignition switch
41 combination instrument A
42 combination instrument B43 parking brake switch
44 brake switch
45 left loudspeaker
46 control case of central control lock
47 grounding wire
48 grounding wire
49 voltage regulator
50 brake liquid level alarming device
51 protective box I
52 plug of wire harness at left rear door
53 door lamp
54 door lamp switch
55 ceiling lamp
56 lamp for reading
57 door lamp
58 door lamp switch
59 backup radar screen
60 right rear loudspeaker
61 highly-mounted stop lamp
62 left rear loudspeaker
1
2
34
5 6
789 10111213
14
15
16
17
18
19
20
2122
23
2425
26
27
28
29 30313233
34
35
36
373839
40
41
4243
4445
4647
48
4950
5152 53
54
55
56
5758 59
60
61
62
Body Electric SystemWire Harness Distribution
BE-72
pi=ph
1 grounding wire
2 wire harness at right front door
3 warm air motor
4 wire harness at right front door
5 control case of central control lock
6 heat-sensitive resistance
7 speed-adjusting resistance
8 connected to housing wire harness
9 connected to housing wire harness
10 A/C switch
11 air-volume switch
12 ashtray luminous lamp
13 ECU
14 receiver
15 rear loudspeaker
16 cigarette lighter
17 cigarette lighter grounding wire
18 cigarette lighter luminous lamp
19 fog lamp switch
20 dual flasher switch21 luminous lamp on air-conditioner panel
22 combined switch
23 instrument
24 instrument
25 stop lamp switch
26 connected to roof wire harness
27 connected to housing wire harness
28 connected to housing wire harness
29 connected to housing wire harness
30 connected to wire harness at left front door
31 connected to wire harness at left front door
32 connected to wire harness at left front door
33 protective box I
34 grounding wire
35 wire harness at left front door
36 connected to wire harness at left rear door
37 parking brake switch
38 connected to wire harness at right rear door
39 right front door lamp switch
40 connected to chassis wire harness
1
2
3
4
5
6
7
8
910
11
12
13 14
1516
17
18 19
20
21
2223
24
25
26
27
28
2930
31
32
33
343536 37 38
39
Cab Wire harness (continued)
40
Body Electric SystemWire Harness Distribution
BE-73
SY SJ
1 grounding wire
2 wire harness at right front door
3 warm air motor
4 connected to wire harness at right front door
5 control case of central control lock
6 electric aerial
7 heat-sensitive resistance
8 speed-adjusting resistance
9 connected to housing wire harness
10 connected to housing wire harness
11 A/C switch
12 air-volume switch
13 ashtray luminous lamp
14 grounding wire
15 ECU
16 CD device
17 CD device
18 cigarette lighter
19 cigarette lighter grounding wire
20 cigarette lighter luminous lamp
21 combined switch
22 fog lamp switch
23 dual flasher switch
24 rear defroster switch
25 rear brush switch
26 rear washer switch27 combination instrument
28 combination instrument
29 stop lamp switch
30 roof wire harness
31 connected to housing wire harness
32 connected to housing wire harness
33 connected to housing wire harness
34 connected to wire harness at left front door
35 connected to wire harness at left front door
36 connected to wire harness at left front door
37 protective box
38 rear defrost relay
39 connected to wire harness of rear air-conditioner
40 grounding wire
41 parking brake switch
42 connected to chassis wire harness
43 wire harness at right rear door
44 right front door lamp switch
45 right rear loudspeaker
46 rear washer motor
47 connected to wire harness at tail door
48 left front door lamp switch
49 wire harness at left rear door
50 left rear loudspeaker
51 standby power seat
1
2
3
4
5
6
7
8
9
101112
13
14
15
1617
181920
21 22232425262728
29
30
31
32
3334
35
36
37
38
39
4041 4243 444546
47
48495051
Cab wire harness (continued)
Body Electric SystemWire Harness Distribution
BE-80
Wire harness at tail door and of rear air-conditioner
SY SJ
wire harness of rear
air-conditionerwire harness
of rear brush
1
2
3456
7
8V 10 1112 13
NQ
Only the vehicle with SY model has the wire harness of rear air-conditioner shown in above-mentioned wire harness.
1 rear A/C switch
2 connected to cab wire harness
3 rear air-conditioning relay
4 grounding wire
5 temperature control switch
6 electromagnetic valve
7 temperature controller8 speed-adjusting resistance
9 license lamp
10 license lamp
11 rear brusher motor
12 defroster
13 defroster
14 connected to cab wire harness
Body Electric SystemWire Harness Distribution