Geely Emgrand X7. Manual part — 294
Geely Emgrand X7. Manual part - 294
3.4.6 Electrical schematic diagram
3.4.6.1 Reverse switch, vehicle speed sensor circuit schematic
IF25 10A
2 EN21
1
EN21
1
IP02
7
IP01
51
EN01
1
SO33
5
SO33
3
EN21
组合仪表
ECM
SPEED IN
VSS
车速传感器
10A IF27
1
2
EN22
EN22
倒车灯开关
右后
组合灯
左后
组合灯
4 SO31
3 SO31
4
3
SO24
SO24
NL03-2013b
Speed sensor
Reverse lamp switch
Combinatio
n instrument
Left rear
combination
lamp
Right
rearcombina
tion lamp
Reverse
radar control
module
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3.4.7 Diagnostic information and procedures
3.4.7.1 Diagnosis descriptions
Refer to 3.4.2 description and operation, get familiar with the system functions and operation before starting
system diagnosis, so that it will help to determine the correct diagnostic procedures, more importantly, it will also
help to determine whether the situation described by the customer is normal.
3.4.7.2 Visual inspection
Common malfunctions of transmission are: hard to shift, gear stuck, gear collision and grinding abnormal sound.
The clutch, drive system malfunction can also cause the above faults. During maintenance, we need carefully
analyze and distinguish.
Prior to repairing, carry out general inspection of the transmission and clutch:
z Check transmission, clutch pipe for oil seeping.
z Inspect the transmission oil level, transmission oil viscosity and color, and then inspect for dirt and metal
debris to determine whether there have been internal components stuck, burning or broken.
z Check transmission and the surrounding components. Check for bolts and nuts loosening or falling off;
z Road test and engage gears to confirm the vehicle conditions for further diagnosis.
Before repairing the transmission abnormal sound, distinguish the clutch, drive shaft, and the engine abnormal
sound, and exclude the external factors that may generate abnormal sound and noise.
Before repairing the transmission abnormal sound, identify the following items:
z Road Noise
Such as noise generated from tires, road, wheel bearings, engine and exhaust system. The noise varies due to
vehicle dimension, type and body insulation materials, etc.
z Drive Shaft System Noise
As a mechanical device, drive axle system can not be without sound during the operation. There will be some
sound during the operation. Confirm the abnormal noise:
1. Choose a good road surface to reduce tires friction and body vibration generated noise.
2. Drive a distance long enough to completely warm up the lubrication oil.
3. Record speed and transmission gear when the noise occurs.
4. Determine whether there is noise when driving the vehicle in the following conditions:
z Slow acceleration or sudden acceleration;
z On an even road, keep the throttle slightly open and maintain constant speed when driving;
z Transmission is put in gear and the throttle closed when cruising.
5. Stop vehicle and shut down the engine, whether there is abnormal sound.
z Bearing Noise
1. Differential Gear or Bearing Noise
Noise of bearings on differential side and the wheel bearing noise is likely to be mixed up. As the differential
bearings have a pre-load force, even if the wheels leave the road, as long as the differential and drive shaft are in
operation, the differential bearings noise will not be significantly reduced.
2. Wheel Bearing Noise
When the transmission is in neutral gear and the vehicle is sliding, the wheel bearing issue a continuous roar or
friction sound. Since there is no wheel bearing pre-load force, when the wheels leave the ground the wheel
bearing noise will be significantly reduced.
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z Bearing internal wear, deformation, indentation in bearing ring; micro-abrasive entering into the bearing and
its seat ring; foreign matter entering into the bearing and the seat ring is locked; bearing and its seat ring due
to wear and tear become loose; and all of these will result in noise and thus make the system unable to work.
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3.4.7.3 Hard to shift
The table below describes possible fault position s. Check each part, and replace them if necessary.
Symptoms Suspected
parts Referance
1. Clutch
3.2 Clutch system
2. Transmission gearshift Lever
3.1 Control system
3. Transmission shift control guy wire
3.1 Control system
4. Transmission shift control mechanism
3.4.8 Dismantle and
installation
Hard to shift
5. Faulty gear or synchronizer
3.4.8 Dismantle and
installation
Diagnostic procedures:
1
Check the transmission shift lever operation.
A. Engine
stopped.
B. Shift rod hard to engage or disengage gears.
2
Check shift control mechanism shift force and travel.
A. Operate the shift lever. Shifting force is 20~30N
(4.5~6.7 LB). Transmission shift control travel
should meet the range shown in the figure.
p(换档摇臂工作状态)
Q(换档摇臂工作状态)
R70
R54
1 3 5
挡位置
2 4 R 挡位置
1、2 挡位置
3、4 挡位置
5、R挡位置
空挡位置
19.5
15
15
19.5
NL03-2014b
Go to step 6
No
Yes
P(shift rocker arm work status)
1st,3rd, 5th speed
position
Neutral position
2nd, 4rd and R
speed position
Q(shift rocker arm work status)
1st,2nd speed
position
3rd,4th speed
position
5th,R speed
position
1178
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