2008 GREAT WALL FLORID air condition

Downloaded from www.Manualslib.com manuals search engine 89Suspension System
Wheel and Tire
Tire
Remark
This vehicle's tire is of the tubeless type. The optimal design condition is met when the inflation pressure is at
the recommended value, and the tire is under full load. Maintaining suitable tire pressure and proper driving
habits greatly influence the tire's use life. For the vehicle, it improves riding comfort, stability, and handling. For
the tire, it reduces tread wear, damage to the tire and extends tire life. Overloading, speeding, and unnecessary
emergency braking will all add to the tire's wear and tear.
Tire pressure measurements should be taken under normal temperature. If the tire pressure rises due to motion
generated heat when driving, cooling it will return to the normal temperature. Therefore, do not deflate the tire
when the air pressure has risen to this point. The tire's air pressure will naturally and slowly decrease when used
under normal conditions. Hence please inspect the air pressure regularly (suggested once a month). The spare
tire should be kept in a useable condition at all times.
Inspect the tire pressure when it is cool monthly or before a long drive. Adjust the tire pressure to the recom-
mended level. The air pressure will normally rise because the tire warms up due to movement. Therefore, after
driving, you absolutely must not deflate or reduce the tire's air pressure, as deflating could reduce the cool tire's
air pressure.
Tire inflation
During a new tire's initial stage of use, warning due to bending motions will cause the tire to swell, and thus
reduce the corresponding air pressure. After 24 hours or 2000-3000 km worth of drive, charge the air pressure.
After inflating, check if the air nozzle core is leaking air with soapy \
water, then lock on the cap.
Possible problems caused by tire pressure
Exceeding the recommended air
pressure
Below the recommended air pressureSame vehicle axle, different
air pressure
Possible problems it
can create
1. Bumpy ride
2. The tear or rupturing of the tire
3. Rapid wear of the tire tread's center
1. Noisy turns
2. Uneasy turns
3. Tread edge wear is accelerated and uneven
4. The tire's rim is damaged or ruptured
5. The tire cord ruptures
6. High tire temperature
7. Steering failure
8. Large oil consumption
1. Uneven braking
2. Over steering
3. Steering failure
4. Deviation while accelerating
Tire and wheel (steel wheel) installation instructions
When installing the tire and wheel, the tire's radial hardware components, also called "high spot", should be at
the same level of the wheel's minimum radius or so called "low spot".
The "high spot" of the tire is initially marked by the paint spot on the side of the tire's surface. This paint will
eventually be washed away.
The "low spot" of the wheel is initially marked by a paint spot on the wheel flange. Whenever the tire is
removed from the wheel, the tire and wheel need re-balancing to make sure the vehicle runs smoothly. If no
paint spot is found on the tire, draw a line on the tire and the wheel before they are removed, in order to make
sure that the tire and the wheel will be re-assembled at the same place.\

Tire replacement
When a tire needs to be replaced, make sure to use a tire with the same specification as the original one. A new
tire used for replacement must be of the same dimension, load area, and structure as the original one. Using tires
that are different in dimension or type will influence the vehicle's riding comfort, handling, speedometer and
odometer calibration, vehicle ground clearance, and the clearance between the tire or the tire's snow chain and
the vehicle body or chassis.
It is suggested to use a new pair of tires on the same axle. If only one tire is needed to be replaced, make sure to
use a tire with a tread most similar to the original, so as to keep brak\
e power and traction balanced.
Warning: Do not mix radial tires, bias tires, bias belted tires, etc., which are of different structure on the
same vehicle unless it is an emergency. Mixing different tires would seriously influence the vehicle's
handling and stability, and even possibly lead to losing control of the vehicle.

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Vehicle road test methods
1. Drive the vehicle and find out if the swaying is coming from the front tires or the back tires. Then replace the
identified problem tire with a good tire (one that has been tested on t\
he same model of vehicle).
2. If unable to determine the problem tire, replace the rear wheels. Continue with the road test. If the driving
condition obviously changes, replace the original tires, and only switch one at a time until the problem tire is
identified.
3. If no obvious improvement, replace all four tires with good tires, and then replace the original tires one by
one following the steps mentioned above.
Tire's abnormal wear and tear
Tire's abnormal wear and tear includes uneven and excessive
w e a r o f t h e t i r e . T h e r e a r e m a n y c a u s e s f o r t h i s . F o r
example, improper tire pressure, tire rotation has not been
timely maintained, bad driving habits, abnormal front wheel
location, etc.
Change the tires when the below situations happen:
1. When the extents of wear and tear of the front and rear
tires are different.
2. When any of the tire's tread has uneven wear and tear.
3. When the extents of the wear and tear of the left and right
front tires are different.
4. When the extents of wear and tear of the left and right rear
wheels are different.
5. When the groove of the tire tread wear appears abnormal
and the tire's contact area starts to flatten.
Inspect the front wheel alignment when the following
situations occur:
1. When the extents of the wear and tear of the left and right
front tires are different.
2. When any of the tire's tread has uneven wear and tear.
3. When the tread pattern strip or pattern block of a front
tire's single side is badly worn.
[A]
[B]
[A]: Steering problems, air pressure not sufficient, or tire rotation has not been timely maintained. [B]: Abnormal front wheel alignment, tire or wheel structure is not the same.
Radial tire sway
Here the sway means the vehicle's front or rear part shakes
from side to side, together or individually. Tire sway is
caused by the steel wire belt inside the tire not being straight.
The sway is the most obvious when the vehicle runs at the
speed of 8-48 km/h.
Road tests can help finding malfunctioning tires. If the
malfunction is with the rear tires, then left and right shaking
or "swaying" would take place at the back of the vehicle.
Here the driver of the vehicle would feel as if someone were
pushing from one side of the vehicle.
If the malfunction is with the front tires, swaying would be
even more obvious. The metal plate in the front may seem
moving back and forth, and the driver feels as if he/she were
at the vehicle's center of rotation.
Wear marks
There are several tread wear marks (refer to location A in the
diagram shown on the left) inside of the tire's pattern groove.
These marks indicate that the tire has been worn to the point
of replacing.
Before the tire's usage limit, indicated by the remaining
pattern's depth, reaches 1.6 mm (and its main pattern groove
bottom protrudes to the same level), for your safety, please
replace the tire.
When serious eccentric wear leads to the partial protrusion
of the cord fabric level, or outside objects damage the tire to
a depth that reaches the cord fabric level or steel band level,
stop using the tire.
A

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Wheel
General tire balancing procedures
Clean out the accumulated dirt and debris from the inside of the rim.
Warning:
The gravel on the tread must be eliminated to avoid flying out and injuring the operator when
undergoing rotational balancing. This is also a good way to acquire better balance. First thoroughly
inspect the tire's damaged condition, then according to the balancing device manufacture's
recommendations, carry out the balancing operation.
Off-vehicle balancing
Most off-vehicle balancers are more accurate and convenient than on-vehicle rotational balancers. They are
also able to perform dynamic (two sided) balancing. Although it does not correct drum brake and brake disc
imbalance like on-vehicle balancing, it achieves the same effect based on its accuracy.
On-vehicle balancing
On-vehicle balancing is different based on equipment and tool manufacturer. Therefore, when performing
balancing operations, be sure to comply to each manufacturer's operating\
instructions.
Warning: Control the wheel rotation speed to make sure the speedometer stays within 55 km/h.
This restriction is necessary because when a driven wheel slides while the other one stays still, the
speedometer will display only half of the actual wheel speed. When a wheel is sliding, be extremely
careful, because sliding wheels can reach very high speeds. This may lead to the tire rubber peeling
or differential damage, which may cause serious personal injury, or damage to the vehicle.
Tire installation and removal
• Install or remove tires with a tire changer. When operating machinery, make sure to comply to the machine
manufacturers operation manual. Please do not change tires merely with manual hand tools or tire installation
crowbars. This will damage the tire chafer or the vehicle wheel's rim.
• Use a wire brush or coarse steel wool to clean off grease and old rubber, as well as light rust or corrosion from
the rim tire bead's tire chafer seat. Before tire installation or removal, first use the indicated tire lubricant to
thoroughly lube the tire chafer portions one time.
• After installing the tire, inflate it to the specified pressure and make\
sure the tire bead is properly seated.
Warning: Do not over-inflate the tire. If the tire bead severally expands and exceeds the safety limit,
it may burst and cause serious personal injury. While inflating, do not exceed the specified pressure.
If the specified pressure does not allow the tire bead to sit properly, deflate the tire, re-lubricate, and
then re-inflate.
Spare tire usage
• Spare tire standard inflation pressure: 420 kPa.
• Spare tire pressure measurements should be taken under normal temperatur\
e conditions.
• After inflating the spare tire, soapy water should be used to check if the air nozzles core is leaking air, then
lock on the air nozzle cap.
• The spare tire should always be kept in a useable state. Check the air p\
ressure at least once a month.
• When the spare tire's working limit, indicated by the remaining pattern's depth, reaches 1.6 mm (and its pat-
tern groove bottom protrudes to the same level), for your safety, please stop using the spare tire.
Caution:
• The "" symbol on the tire bead of the spare tire in-
dicates the set position of the wear index (shown on
the left).
• The spare tire's maximum driven speed is 80 km/h,
and maximum distance 200 km per trip.
• Each vehicle is allowed to use only one spare tire.
• The spare tire is only used as a temporary backup.
Please go to a professional service station immediately
to get the initial tire repaired or replaced.

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Brake System Maintenance
Brake fluid inspection and replacement
Brake fluid directly influences the brake performance and the operating conditions and use life of the brake
system components. Brake fluid has very strong hygroscopic properties, and thus absorbs water easily,
which will then deteriorate the metal and rubber pieces. Polluted and deteriorated brake fluid or its mixture
would cause the brake fluid to boil and gasify, hence reduces braking efficiency. Therefore, pay attention to
the items below when filling or changing the brake fluid:
1. Containers used to hold brake fluid must be tightly closed and sealed
2. Brake fluid is poisonous and damaging to the paint. Hence if it gets on the vehicle surface, rub it
off at once
3. If water or other contaminates found in the brake fluid, and the brake master cylinder's piston seal
has been broken, then the brake fluid and all the rubber pieces inside the brake system including
the brake hose must be replaced
4. The correct brake fluid level in the reservoir must be between MAX and MIN. After the vehicle has
been driven for over 1000 km, check the brake fluid level in the reservoir. If the brake fluid level is
not up to regulation, more brake fluid should be added to the reservoir \
until it reaches MAX.
Hydraulic component inspection and system flushing
1. If the oil-based solvent gets into the hydraulic system, flush the whole system and change all of
the rubber pieces
2. Clean your hands before installing new rubber pieces or other components
3. Do not use regular solvents (kerosene, gas, etc.) when inspecting or cleaning hydraulic
components, instead use absorbing alcohol or brake fluid
4. After inspecting the components, drain the brake fluid from the system. Use new brake fluid to
flush the system. Afterwards, add new brake fluid to perform hydraulic system exhaust
5. Flushing completion sign: When the brake fluid flowing out of the dump valve is clear from any
contaminate.
Hydraulic pressure system drainage
If the brake fluid inside the whole hydraulic pressure system needs to be emptied, open all the bleed screws
with each connected to a hose, as to allow the brake fluid to flow into a container. Step on the pedal slowly
until only air flows out. During the whole procedure, make sure all the \
valves are open.
Hydraulic pressure system air bleeding
The hydraulic brake system must work under a vacuum environment. The air will cause spongy brake or
overall brake failure when it flows into the hydraulic system. It is extremely necessary to bleed system air
when performing any operation on the brake system or if any air inside t\
he brake system is suspected.
1. Air bleeding sequence
If air inside the brake master cylinder is suspected, first perform air bleeding.
(a) If numerous valves are equipped, air bleed each valve
(b) Another sequence principle is: Air bleed from the wheel brake furthest away from the master cylinder.
The air bleeding sequence for the LHD modules is: rear right wheel - left rear wheel - front right wheel
- front left wheel, Right rudder vehicles: rear right wheel - left rear wheel - front left wheel - front right
wheel.
2. Air bleeding method
(1) Manual air bleeding
Use the brake pedal or pump as the air bleeding power source. When the air bleed screws are open, vent the
brake fluid containing the bubbles from the system. Usually this is simultaneously done by two people. One
steps on the brake pedal and the other operates the air bleed screws. Important points to take note of when
performing the operation:
(a) Place the ignition switch to the off position and step on the pedal repeatedly to remove the
vacuum pressure or hydraulic pressure.
(b) Before and after air bleeding, add clean brake fluid into the master cylinder until it reaches
the correct (stated) level.
(c) Check the fluid level frequently to make sure that more than half of the reservoir's capacity is
available.
(d) Bleed screws should only be opened when the pedal is pressed down, and closed before the
pedal is loosened. Meanwhile, check if the vented brake fluid has bubble\
s inside.

Downloaded from www.Manualslib.com manuals search engine 97Brake System
(e) Make sure not to let the system valves block the air bleeding.
(f) When the brake fluid that flows out of the hose or connector has no bubbles, it means that the air
in the system has been exhausted. There is still air inside the system if the hose inserted into the
brake fluid is still bubbling when pressing down the pedal.
(g) Keep the free end of the hose immerged in the brake fluid to avoid air from flowing into the
system while opening the screw.
(h) While air bleeding, hammer the casting part of the vibrating brake device with a rubber hammer.
This is helpful for removing bubbles deep in the brake fluid.
(i) If air in the master cylinder is suspected, then perform air bleeding on the master cylinder first,
then the wheel cylinder or brake caliper.
(j) When releasing air from the tires, generally make sure to release air out of all the tires.
(k) To avoid the possibility of air reversely entering into the system, a bleeder hose that has a check
valve could be used.
(2) Pressure blow-off
Under the proper conditions, a pressure blow-off device can be used to release the air inside the brake system.
3. Air releasing sequence
(1) Master cylinder air bleeding
If the master cylinder does not have air bleed screws, perform the follo\
wing steps:
(a) Check the brake fluid level inside the master cylinder’s reservoir and add to it if necessary.
(b) Slowly take off the front brake pipe connector until the brake fluid flows out from the end.
(c) Reconnect the brake pipe, but do not tighten it.
(d) Slowly step down and press on the brake pedal, check if the brake fluid flowing out of the connector
contains bubbles.
(e) Tighten the pipe fitting.
(f) Have the assistant loosen the pedal, wait for 15 s.
(g) Repeat the above steps until all the air is released.
(h) Take off the rear brake pipe connector, repeat the above steps.
(2) Wheel brake air releasing
(a) Check the brake fluid level inside the master cylinder’s reservoir and add to it if necessary. During the
entire air releasing period, check repeatedly and add promptly.
(b) Connect one end of the bleeder hose with the bleed screw and the other end immerged in the brake fluid.
(c) Have the assistant step on the pedal several times, raise the pedal gradually until it cannot be stepped on
any more, then forcibly press on the pedal once more.
(d) Loosen the bleed screw, check if there are any bubbles in the brake fluid flowing out. Meanwhile, slowly
lower the pedal.
(e) When the brake pedal is close to the stroke end or the out flowing brake fluid does not have any bubbles,
tighten the bleed screw.
(f) Have the assistant release the pedal and wait for 15 s.
(g) Repeat the above steps until there are no bubbles in the flowing brake fluid when the screw is loosened.
(h) Release the air for all the wheels in turn using the same method.
(i) After releasing the air from the entire system, switch the ignition to the on position.
(j) Inspect the stroke of the brake pedal and its reaction.
(k) Inspect the lighting condition of the brake warning lamp, and repeatedly perform maintenance or air
bleeding if necessary.
( l ) Add brake fluid to the reservoir until the specified fluid level, air bleeding is complete.

Downloaded from www.Manualslib.com manuals search engine 103Brake System
Vacuum Booster with Brake Cylinder Assembly
Components
Areas of Importance
1. The vacuum booster with brake cylinder assembly is tightly connected with the brake pedal assembly on
the cowl panel using four nuts. It is also connected with the brake pedal push rod via an center pin and
lock pin. Thus before removal of the assembly, first loosen the rigid pipe fitting with an open-end wrench,
disconnect the lock pin and center pin using pliers, loosen the four nuts, and then proceed with the booster.
2. Tighten the lock nuts on brake master cylinder and vacuum booster according to the specified torque,
and coat with signal paint.
3. Dimensions between the rear housing head face and the adjusting fork hole center is adjusted to
standard before it leaves factory. Please do not adjust it again.
4. The vacuum booster valve rod on the vehicle must be in a free state.
5. The brake master cylinder's working agent is DOT4 brake fluid. It must not be mixed with any other
brake fluid.
Problems and symptomsCausesEliminating methods
M a s t e r c y l i n d e r ' s o i l r e s e r v o i r i s severely leakingThe master cylinder, slave cylinder, or hydraulic line is leaking.Eliminate the areas with leaks (in general, it may be that the pipe fitting's tightening torque is not enough, check one by one and tighten as necessary)
1. Vacuum booster not sufficient2. No boost when the engine is off3. May lead to unsteady engine idling when severe
1. Under non-operating conditions, the vacuum booster leaks air.2. Front and rear housing connection are not sealed.3. Booster's front and rear gas seal sealing failure.4. Vacuum check valve leaks.
1. Replace the front and back gas seal and control valve assembly.2. Replace the vacuum booster.3. Replace the vacuum check valve assembly.
Brake pedal is heavy with no boost effect1. Under non-operating conditions, the vacuum booster leaks air.2. Booster diaphragm worn and damaged.3. Control valve ring cup worn and damaged.
1. Replace the front, back gas seal and booster diaphragm.2. Replace the vacuum booster.3. Replace the control valve assembly.
Spongy pedal when braking1. There is air in the brake fluid.2. Cylinder or slave cylinder leaks oil.3. There is brake line seepage.
1. Eliminate the air in the system.2. Inspect the cylinder and sub-pump cup and replace with new parts.3. Inspect the pipeline and eliminate the seepage.
When continuously step on the brake pedal, the pedal will gradually change and expand till the highest extend.
Pump valve opening blockage.Brake fluid cleanliness is insufficient, please replace the brake fluid.
Troubleshooting
Oil cup cover
Oil cup body
Check valve
Check valve seat
Vacuum booster
Pad
Lock nut
Rod clevisCoupling nut
Rectangular sealing ringCylinder body
Fluid supply sealing ring

Downloaded from www.Manualslib.com manuals search engine 145Vehicle Body Electronic System
Fuse numberCurrent ratingFuse typePowerBearer circuit
F01Reserve
AutoFuse
30 Battery (+)
F0225 ASunroof (Elite)
F0310 AParking lamp relay, front fog lamp
switch, rear fog lamp switch
F0415 A
F05Reserve
F0615 AHazard warning lamp
F0710 A15a IG1 Turn signal lamp
F0815 A
30 Battery (+)
Front fog lamp relay
F0910 ARear fog lamp relay
F1010 ACompressor relay
F1110 ARear wiper relay
F1225 ARear defroster, rearview mirror defroster
F1310 ACombination meter
F1410 AInternal lighting
F1520 ACentral lock controller
F1610 ABrake lamp switch
F1715 AStereo
F18Reserve
F19Reserve
F20Reserve
F2125 AX Attached
ACC
Front cigarette lighter, rear cigarette
lighter, backup power supply
F2215 APower rearview mirror
F2315 A
15a IG1
Front wiper motor, front and rear washer motor
F2410 ACombination meter indicator lamp power
F2510 AABS ECU
F2615 AAirbag
F27Reserve
F2810 AReverse lamp, air conditioner controller
S/B1Reserve
Slow burn fuse 30 Battery (+)
S/B230 ADoor and window relay (Non Jam Protection)
S/B3Reserve
S/B440 ABlower relay
S/B5Reserve
Fuse number and bearer circuit

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Plug-in connector pin's function
Pin numberFunctionPin numberFunction
A01Rear fog lampA11Empty
A02Internal lightingA12Empty
A03EmptyA13Empty
A04Combination switch
(front fog lamp)A14Empty
A05Combination meter A15Empty
A06Front fog lampA16Empty
A07EmptyA17Empty
A08EmptyA18Empty
A09Central lock controllerA19Empty
A10Combination switch
(rear fog lamp)A20Empty
B01Power IG (12v)B10Empty
B02GroundB11Empty
B03Power rearview mir-
ror switch, CDB12Window regulator motor
B04Ignition switch (ACC)B13
Front & rear cigarette
lighter, backup
power supply
B05EmptyB14Empty
B06Compressor controlB15Reverse lamp, air
conditioner controller
B07EmptyB16Empty
B08Front wiper, front and
rear washer motorB17Empty
B09GroundB18Empty
C01Air conditioner con-
troller (blower) C08Rear glass and rearview
mirror defroster
C02Air conditioner
controller (defroster) C09Empty
C03Airbag ECU C10Empty
C04Combination switch
(rear wiper) C11Empty
C05ABS ECUC12Empty
C06Rear wiper power resetC13Combination meter
C07Rear wiper motorC14Rear wiper reset