Great Wall service chassis and body Manual — part 76
BE-33
Body Electric System
Combination Instrument
Electric circuit diagram (continued)
SF
A 3 c o n n e c t e d
with negative pole
A1 connected
with positive pole
B8 connected
with negative
pole
B7
connected
with positive
pole
A4 connecting
with lighting
switch
A6 connected
with negative
pole
pressure-regulating
potential device
irect-current
power supply
5-9V
drive power
supply
110V
EL
luminous
plate
left turn indicating lamp
right turn indicating lamp
upper beam indicating lamp
rear fog lamp indicating lamp
rear window/defroster indicating lamp
front fog-lamp indicating lamp
water
thermometer
tachometer
connected with sensor
connected with revolution signal
speedometer
digital clock
fuel gauge
connect to the cathode of sensor
connected with sensor anode
connected with sensor
connected with sensor
back door indicating lamp
parking brake indicating lamp
safety airbag indicating lamp
low oil pressure indicating lamp
engine failure indicating lamp
four wheel drive indicating lamp
generator preheating indicating lamp
fuel alarming indicating lamp
accumulator charging indicating lamp
ABS failure indicating lamp
75
B9
B2
A15
B1
A9
B11
B10
A14
B4
B6
A12
B14 connected
with positive
pole
B7 connected
with positive
pole
A11
A5
A7
B12
B5
B13
A16
A13
B16
B15
A2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
In this drawing, A stands for the white plugging
elements, B for black plugging elements, they
use the same numerical order.
instrument
plugging element
BE-34
Body Electric System
Combination Instrument
Electric circuit diagram (continued)
A16
A1
B16
B1
SL SK
B1
B16
A1
A16
speed and mileage meter
4P
G
V
A9
vehicle speed signal
A11
odometer sensor
A10
odometer sensor anode
B11
sensor signal
electronic tachometer
water thermometer
fuel gauge
coolant temperature sensor
B5
A12
fuel gauge sensor
B14
A2
B3
upper beam
_NP
differential latch-in
safety belt
preheating
sediment water alarming
electricity charging/
discharging
fuel level alarming
brake failure alarming lamp
oil pressure alarming lamp
rear fog lamp
engine failure
four wheel drive indicating lamp
A1 Aturn indicating lamp
B16 left turn indicating lamp
A8
B4 +
B7 -
B8
A16
B15
B2
B1
A15
A14
B6
A13
B10
B9
SY SJ
accumulator plus four door-closing indicating lamp
A3
turn on when the door is opened.
A11
odometer sensor
_NO
electronic odometer
electronic tachometer
A10
B11
engine ignition coil
water thermometer
fuel gauge
B5
A12
neutral gear indicating lamp
A9
_NP
upper beam
B14
differential latch-in
vacuum alarming
preheating
sediment water alarming
electricity charging/
discharging
fuel level alarming
brake failure alarming lamp
oil pressure alarming lamp
rear fog lamp
engine failure
four wheel drive indicating lamp
A1 left turn indicating lamp
B16 right turn indicating lamp
A8
B4 +
instrument lighting
system
B8
B7 -
A16
B15
B2
B1
A15
A14
B6
A13
B9
B3
B10
A2
instrument lighting
system
BE-35
Body Electric System
Combination Instrument
Common Troubleshooting
a.
Such failures as inaccuracy indication, out-operation of indicator, on the fly of large and small summation meters
(mechanical wheel drive excluded) or incomplete liquid crystal display are caused by the interior failures of the
instrument, therefore, these failures, once occur, should be judged according to the instrument interior failures, and
change the combination instrument directly.
b.
In case both the large and small summation meter and the indicator of electronic odometer are on the fly, such failures
can be removed by disassembling the speed sensor from the whole vehicle first, then connecting the sensor and
combination instruments as shown in the drawing.
Then, open the power supply and run the rotors quickly to observe the indicator variation of odometer.
the odometer indicator
should be no less than 40Km/
h variation in speed under
common condition when
running the rotors,
otherwise,
change with the good sensor
good combination instruments
vÉë
No
Yes
No
Yes
No
installation of sensor
connector for wiring harness
malfunction of sensor
failure of instrument
panel
connector for wiring
harness
12V
combination instrument
signal input
sensor
BE-36
Body Electric System
Combination Instrument
Normal indicating range of combination instrument indicator
Speedometer
Real speed Km/h
Displayed speedKm/h
20
40
60
80
100
120
140
160
20
3
40
0
5
60
0
5
Tachometer SY SL
80
0
5
100
0
5
120
0
6
140
0
7
160
0
8
750
1000
2000
3000
4000
5000
6000
750
-10
+20
1000
-10
+50
2000
120 3000 150 4000 200
5000
250 6000 300
Real rotating
speedr/min
Displayed rotating
speedr/min
Tachometer Dr SL SK SF
1000
2000
3000
4000
5000
6000
7000
1000
100 2000 200 3000 150
4000
200 5000 250 6000 300 7000 350
Real rotating
speedr/min
Displayed rotating
speedr/min
c.
The inaccuracy display of tachometer is usually caused by the interior failures of tachometer, in such situation,
change the combination directly. As for the good-bad shift or out-operation of tachometer, the failures can be judged
according to the following approaches:
1)
Start the vehicle, then check the voltage of signal input of tachometer (wire harness with multi-meter, the
voltage should be 6 V or so.
2)
In case there is no signal voltage, check the power supply system of the whole vehicle to remove the failures
in circuit.
3)
The plugs of wire harness is only allowed to be inserted in the combination instruments under the condition
that the signal voltage is normal, and the instrument is in normal operation.
4)
Where the instrument is in abnormal operation, such trouble is caused by the failure of combination
instruments, in such case, change the combination instrument directly.
d.
Troubles of fuel gauge and water thermometer
1)
In case the instrument indicator points to the large number after it is powered, disconnect the sensor from the
plugging elements of wire harness before judging such kinds of troubles, if the indicator is still at large number,
it can be make a judgment that the trouble is caused by the interior failure of instrument, in such case, change
the combination instrument directly; if the indicator returns to the small number, according to which it can be
judged that the trouble is caused by the sensor failure, therefore, change the sensor directly.
2)
where the instrument indicator stands still, such trouble may be caused by three causes probably, interior failure
of sensor, plugging elements of wire harness or interior failure of instrument; the inspection may be conducted
according to the following approaches: disconnect the plugging elements of wire harness from that of sensor,
grounding the wire at the sensor end; in such condition, the indicator should move upwardly to the largest
number; if such phenomena occurs, it can show the trouble is caused by the interior failure of sensor, in such
case, change the sensor directly; if the instrument indicator is still immobilized after it is powered, it can be
judged that the trouble is caused by the interior failure of instrument under the condition that the wire harness
and plugging elements are normal, in such case, change the combination instrument directly.
Fuel gauge Dr SF SY
Displayed oil
volume
Reference
resistance
Permitted
error
E
1/2
F
110
38
7
5
4
+3
Fuel gauge SJ
Displayed oil
volume
Reference
resistance
Permitted
error
E
1/2
F
110
38
7
12
4
2
Fuel gauge SL SK
Displayed oil
volume
Reference
resistance
Permitted
error
E
1/2
F
120
45
17
10
10 10
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