2006 GREAT WALL HOVER ad blue

CD Player and Air Conditioning System-3
(Figure 7-2) cable position of 2-pin connector socket

Pos. No. Color Function Pos. No. Color Function
1 Whit e Send the data (TX) 11 Shielded cable Earthing of data cable
2 Red Receive the data (RX) 12 — —
3 Brown Telephone mute (TEL) 13 Blue Automatic antenna (ANT )
4 Orange Lighting (LAMP) 14 Red Ignition power supply (ACC)
5 — — 15 Grounding wire
6 — — 16 Yellow Memory power supply B+
7 Whit e and
black Front left speak (-FL-) 17 Green and black Rear left speak (-RL-)
8 White Front left speak (+FL+) 18 Green Rear left speak (+RL+)
9 Gray and
black Front right speak (-FR-) 19 Violet and black Rear right speak (-RR-)
10 Gray Front right speak (-FR+) 20 Violet {Rear right speak (+RR+)

Possible Troubles of CD Player, Inspection and Analysis

Trouble Descriptions Possible causes, inspection and solutions
No programs received for AM and FM Check if the antenna is pulled out and socket becomes
loosened.
Impurity of sound after radio auto-searching Tune to the correct radio station with manual tuning method
No sound of one speaker Check the speaker a nd the socket or adjust the balance(front,
back, left and right)
Refuse to work Check the power supply, or disconnect and connect the power
supply and restart the player.
No power supply Check if the plug-in fuse and output plug is loosened and if the
fuse is burned down.
Single channel when played Check if the speaker is in open-circuit and examine its plug
Not read CD Check the CD type and if it is placed in reverse or scratched.
Display screen displaying bad Check the connecting wire of display screen or adjust the
brightness level higher
Air conditioner refuses to start Inspect the ECU of air conditioner and air conditioning system
Button failure of air conditioner Inspect the ECU of air conditioner and air conditioning system

A-side V iew

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.