2006 GREAT WALL HOVER air condition

CD Player and Air Conditioning System-14
Pumping Out of A i r Conditioning System to the Vacuum and Addition of Refrigeration Oil
Connect the manifold pressure gauge with the pipe of air conditioner (compressor) and the multi-purpose adapter of the vacuum
pump for the purpose of pumping out of the system to the vacuum state.
Before pumping out to the vacuum, turn on the high-pressure and low-pressure valve of the
manifold pressure gauge and the end valve
(if provided) of the vacuum pump, then press the button ON to start the vacuum pump, the duration shall be more than 20 minutes
.
When the reading of manifold pressure gauge is -760mmHg or below, turn off the high-pressure and low-pressure valve (if opened)
,
and press the switch to turn off the vacuum pum
p.
1 . check the air tightness
Continue to check the pressure reading of the manifold pressure gauge after turning off the vacuum pump.
If the pressure reading remains unchanged within 20 minutes after the vacuum pump stops running, then it indicates that th
e
refrigerating system has no leakage, the operator can proceed with next work; while change of the reading indicates that the
system has the leakage. Launch the examination and pump out to the vacuum after the leakage is fixed.
2 . Injection of the refrigerant
When the air tightness of the system is verified correct, connect the refrigerant reservoir (or gas bottle) with one end of the yellow
a ir-charging hose, while other end of yellow air-charging hose is connected with the liquid injection port in the middle of the
manifold pressure gauge. Ensure that the refrigerant reservoir is connected firmly with the nut of air-charging hose, then turn on
the valve of refrigerant reservoir; at this time, the high-pressure and low-pressure is closed, use a tip screw driver or other
similar
tools and press the by-pass valve spool for 1~ 2 seconds to discharge out the air in the air-charging hose and the manifold
pressure gauge.
low p ressure
high pressure
manifold pressure gauge
quick coupler
l ow-pressure pump
high-pressure pipe
quick coupler
quick
coupler
red
blue
vacuum pum
p
manifold pressure gauge
low pressure gauge high
pressure gauge
Red
blue
yellow
yellow
4. Attention:
a. when a new compressor is used to substitute for the old one, the oil must be released to some extent that its oil volume is the
same as that of old compressor so as to avoid the influence over the refrigeration effect due to too much oil.
b. when an old or repaired compressor is employed, the volume of the refrigeration oil in the compressor must be kept the sam
e
as that of the replaced
compressor.

CD Player and Air Conditioning System-15
Turn on the high-pressure valve on the manifold pressure gauge and inject the refrigerant to the system from high-pressure pipeline.
At this time, the attention shall be given to the readings of high-pressure meter and low-pressure meter, and make sure that these two
pressure all go up. If the refrigerant is being injected while the pressure does not go up, then the joints of the pipeline may be loosened
or the seals damaged, inject the refrigerant once more after finding out the cause and the fixing. When the increase of pressure stops,
turn off the high-pressure valve of the manifold pressure gauge and then start the engine
.
Operate the switch in a way as follows:
Turn the switch of air conditioner to “ON”
Regulate the temperature controller to the coolest position,
Enable the air conveying to the maximum,
Select the internal air circulation between the internal/external air circulation,
During this process, the door and windows will be all opened.
Adjust the engine’s speed to the specified free running speed.
Erect the refrigerant reservoir or gas bottle (have the refrigerant injected into the refrigerating system in a gas state), turn on the
low-pressure valve of the manifold pressure gauge.
When the compressor is at work, please do not turn on the high-pressure valve.
Before checking the refrigeration level, please confirm the injection volume of the refrigerant specified for air conditioning system.
When injecting the refrigerant, carefully observe the high-pressure side of the manifold pressure gauge and the flow condition of
the refrigerant (clear, foaming or turbid), all these could be viewed through the inspection window, by which the moment of stop
injecting the refrigerant can be reasonably judged(turning off the low-pressure valve).
air washingoff
off
tip screw driverred
yellow blue
refrigerant reservoirhigh-pressure low-pressure
off
low-pressure pipe
high-pressure pipe
refrigerant reservoiryellowred blueon

CD Player and Air Conditioning System-16
refrigerant reservoir high-pressure pipelow pressure
high pressure
yellowred blueon on
low-pressure pipe
When judging the injection volume of the refrigerant, please make the settings based on the following working conditions:
Water tank temperature of the engine: stable
Speed of the engine: normal free running speed
Switch of air conditioner: ON
Switch of the fan: “High” gear
Temperature controller: air return temperature inside the car is between 25
and 30.
Fresh air control: internal circulation
Door: all opened
Window: all opened
Repair and replacement of pipeline
a. Before installation of parts and components, the negative pole of the accumulator must be disconnected.
cut off
b. When the air entries of the refrigerating system, water tank of the engine and the air conditioner are opened, please make sure that
all openings are capped to prevent the penetration of the dust, foreign matters or water.
protective cap protective cap
protective cap must be installed.

CD Player and Air Conditioning System-17
Daily Maintenance of Air Conditioning System
In order to ensure normal operation of air conditioning system, maintenance and care services shall be frequently performed for the
air conditioning system. The daily maintenance of air conditioning system is illustrated as follows:
1. Inspect, wash and clean the condenser of air conditioning system, requiring that radiator pins are clean and there is no dirt
between the pins. After the car runs in the rain or on the muddy road, the fan of the condenser should be inspected to find
whether it bears the earth, sand, stone and etc, and remove them if any.
2. Check the quantity of the working media of the refrigerating system; when the compressor set works normally, observe the
liquid viewing glass, under the normal circumstance, there shall be not air bubbles in the glass.
3. Inspect the drive belt. The belt between the compressor and the engine should be tensioned.
4. Check if there is any abnormal noise or odor in the air conditioning system.
5. Check if the temperature difference between the air inlet and outlet of the compressor is normal.
6. Check if the hose of the refrigerating system is in an apparent good condition and connections of all joints are secure.
7. Check if the pipeline of the refrigerating system collides with other parts and components, and if there is any oil leakage trace
left at each joint.
8. Check if the circuit connection of the refrigerating system is secure and if there is an occurrence of short circuit and falling off
9. Check if fastening bolts of the compressor are firmly secured or broken. d. When connecting the pipe, apply little compressor oil to the O-ring and fasten the nut with two wrenches. Attention: never
spatter the compressor oil to the painted parts or the plastic components to avoid the corrosion. If these components are
spattered with the oil, please clean it immediately.
e. When connecting the pipe, please follow the torque listed in the following table to fasten the screws or the nuts:
Diameter of Pipe Fastening Torque (N·m)
￠8mm 12-15
￠16mm 30-35 30－35


At ends of each pipe the protective caps should be installed till the pipe is connected to the refrigerating system.
compressor oil fasten it by using two wrenches at the same time

Safety airbag-10
1. Extinguishments of safety airbag system alarm lamp
Troubleshooting
Extinguishments or normal-light of alarm lamp
NO . Troubleshooting item Description
1 T he warning la mp of safety a irbag
system is not displayed. Safety airbag system warns circuit failure
2 T he warning la mp of safety a irbag
system is light normally. Safety airbag system warns circuit failure or external
failure.

1 Extinguishments of safety airbag system alarm lamp
Test status Safety airbag system warns circuit failure.
Possible causes No voltage (fuse shutoff)
Combined instrument failure
Failure of wiring harness between instrument cluster and ECU unit

Diagnostic procedure
When first carry out failure test, joggle the wiring harness and plug to test whether there is periodical bad contact in the circuit, if
it so, please confirm whether the plug, terminal and wiring harness well connected and in good condition. If it is not any of previous
cases, operate according to the following steps.
Procedure Te s t Operation
Ye s Place the ignition switch in LOCK
position followed by next step
1 Test other wiring harness and instrument cluster
indicator lamp
·place the ignition switch in ON position
·light other alarm and indicator lamps No Test the instrument cluster power-supply
system and grounding s ystem (fuse), then
go to step 5.
Yes Next step
2 Bulb test
Warning:
Incorrect handling with the safety airbag system
units will cause the safety airbag’s improper
release and pretension of safety belt, which will
lead to serene accidents. Please read safety airbag
service warning before handling the safety airbag
units.
·Place the ignition switch in LOCK position。
·shut off accumulator negative line and keep the
status for at least 60 seconds.
·Remove the combined instrument.
Test the connection between the two
corresponding stitches of safety airbag alarm lamp No





Rep la ce th e b ulb of a larm la mp.

Safety airbag-12
Begin the test with diagnostic communication with special diagnostic device (X-431 diagnostic tester) and ECU
to find out the failure causes, do the next test providing communication is not successful.
Procedure Te s t Operation
Yes Next procedure
1 Test the battery
Test the battery voltage
Is the voltage higher 9V? No Insufficient battery supply.
Test the charging/discharging
system, then go to step 5.
Yes Next step
2 Test the wiring harness connection between ECU and
combined instrument.
Place the ignition switch in LO C K position。
Shut off the battery negative.
O pen the central channel guard plate.
Shut off the instrument combined connector clip
Connect the negative of battery
Place the ignition switch in ON position.
Check whether the instrument connector clip terminal
voltage is 12V(power supply and instrument line) No Check the circuit and continue the
operation according to step 5.
Yes Next step
3 Place the ignition switch in LO C K position。
Check the connection of corresponding terminals between
instrument connector clip and diagnostic interface
(diagnose the two ends of K-line) No Repair or replace the wiring
harness and continue according to
step 5
Yes Next step
3 Make sure the shutoff of accumulator negative line and
keep the status for at least 1 minute.
Shut off ECU connector clip
Shut off the instrument cluster plug.
Connect the ECU plug terminal 5,7,9 and instrument
cluster plug? No Replace the wiring harness and
step 5
Yes Replace ECU
4 Remove EC U to check the condition of term inal and
whether the shorting bar is broken.
No Reconnect EC U connector clip
and next step.
Yes Troubleshooting followed by the
explanations to customers upon
the repair ing pro ced ur e.
5
Make sure that the failure will never reoccur after
repairing.
Place the ignition switch in LO C K position。
Shut off accumulator negative line and keep the status for
at least 1 m in ute.
Connect all ECU plugs
Connect the driver’s side safety airbag combined
instrum ent p lug
Connect the passengers’ side safety airbag combined
instrum ent p lug
Connect the driver and passengers’ side pretension safety
belts plugs.
(Vehicles with pretension safety-b elts)
Connect clock spring plug
Connect the accumulator negative line
Place the ignition switch in ON position
Does the safety airbag alarm lamp work functionally? No Retest the failure symptoms;
repeat from step 1 if the failure
reoccurs.

Safety airbag-13
Internal failure
Failure code
$9071 SRS safety airbag system unit internal failure
Test condition Warning
The test condition of this failure is the failure code that may not emerge before the test,
DTC conducts the test, and the preparatory work must be done before the test because the
damage to working personnel or system may be caused by the incorrect operation during the
test.
SRS safety airbag system electronic-control unit internal circuit failure.
Possible causes SRS safety airbag system unit internal failure
Operation
With regard to replacing SRS safet y airbag system unit, take references in the removal/installation of safety airbag system

Safety airbag-14
Power-supply
Failure code
$9032 Low power-supply voltage for SRS safety airbag system electronic-control unit
Test condition Warning
The test condition of this failure is the failure code that may not emerge before the test, DTC conducts the test,
and the preparatory work must be done before the test because the damage to working personnel or system
may be caused by the incorrect op eration during the test.
The voltage for SRS safety airbag system unit connector clip is stitch 5 and 6 is under 9V
Possible
caus es Accumulator low voltage
Failure with the wiring harness between accumulator and SRS safety airbag system electronic-control unit
Procedure Test Operation
Yes Next step
1 Check accumulator
Test accumulator voltage
Is the voltage above 9V No Accumulator low voltage, test the
recharging/discharging system
Yes Next step
2 Check the wiring harness between accumulator and fuse
panel
Remove fuse panel without releasing the connector clips
Place the ignition switch in ON position
Test the potential of two fuse corresponding contactors, the
potential above 9V? No Check the wiring harness
Yes Next step
3 Check the wiring harness between fuse panel and SRS
safety airbag system unit connector clip
Warning:
If not correctly handled, the safety airbag module as well
as pretension safety belt may possibly be trigged, released
and tensioned, thus make serene damage to people.
Ther efor e, pleas e carefully r ead the r epairing warning
before trouble handling. Please take references in safety
airbag system repairing warning
Place the ignition switch in LOCK position
Release accumulator negative wire and wait for 1 minute
plus
Remove steering pillar shell
Release the clock spring connection clips
Remove the PAB trim cover, glove box (passengers’ side
safety airbag is under the trim cover)
Release passengers’ side safety airbag module connector
clips
Release all SRS safety airbag system unit connector clips
Install back the accumulator negative wire,
Place the ignition switch in ON position
Is the potential of SRS safety airbag system unit connector
clips stitch 5,6(grounding) above 9V? No Replace wiring harness