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[x] Cancel search | Manufacturer: GREAT WALL, Model Year: 2008, Model line: FLORID, Model: GREAT WALL FLORID 2008Pages: 281, PDF Size: 43.97 MB
Page 219 of 281
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High pressure side pressure(MPa)
Appropriate pressure
Appropriate chargeExcessive charge
Refrigerant charge (g)
5. When charging the refrigerant, carefully observe the
high pressure side of the manifold pressure gauge as
well as the refrigerant's rate of flow (limpid, foamy, hazy)
which can all be seen from the inspection window. Use
this window to determine the appropriate time to stop
charging the refrigerant (by closing the low pressure
valve).
When the compressor is operating, please do not close the
high pressure valve.
Before inspecting the cooling level, confirm the regulated
refrigerant charge quantity for the air conditioning system.
Determine the charge amount for the refrigerant charge.
Please carry out the setup according to the following
working conditions.
Engine's water tank temperature: steady
Engine speed: normal idle
A/C switch: ON
Blower speed control switch: highest gear
Temperature controller: inner circulation
Door: completely open
Window: completely open
Filling Quantity and Method for Refrigerant Oil
First vacuum the refrigerant system to 0.2 × 10-5 Pa, then fill it with model number RS20 refrigerant. The steps
are as follows:
1. Close the high pressure, manually operated valve and the auxiliary valve\
.
2. Remove the high pressure side's hose from the manifold pressure gauge an\
d insert it into the oil cup.
3. Open the auxiliary valve and draw the refrigerant from the oil cup to th\
e refrigeration system.
4. When refrigerant in the oil cup is about to be fully vacuumed, immediately close the auxiliary valve, in
order to avoid sucking air into the system.
5. Screw the high pressure side hose connector onto the manifold pressure gauge, start the vacuum
pump and open the high pressure, manually operated valve, then open the auxiliary valve to vacuum
the system until it reaches 0.2 × 10-5 Pa, and continue to vacuum for 15 minutes to exhaust the air
which is entering the system following the oil.
Caution: When replacing an old compressor with a new one, be sure to bleed out some oil in order to
level off the new and the old compressor's oil level, and to avoid an excessive oil amount influencing
the cooling effect. When using an old or repaired compressor, be sure to keep the refrigerant inside
the compressor the same level as the one that is being replaced.
Daily Maintenance of the Air Conditioning System
In order to guarantee the air conditioning system's normal operation, regular maintenance should be performed.
Daily maintenance for the air conditioning system is as follows:
1. Inspect and clean the air conditioning system's condenser. The cooling fin's insides need to be
cleaned, with no blockage in between. After driving in the rain or on a muddy road, check the
condenser fan for silt or rocks. If any are found, immediately clean the\
m up.
2. Inspect the refrigeration system's refrigerant amount: When the air conditioning unit is operating
normally, observe the oil check glass. Under normal conditions, the oil check glass should have no air
bubbles.
3. Inspect the drive belt. The belt between the compressor and the decoration cover should be tight\
.
4. Check the air conditioning system to make sure there is no irregular noi\
se or unusual odors.
5. Check the compressor's inlet and exhaust port areas to make sure the tem\
perature is normal.
6. Check to make sure the appearance of the refrigeration system's hose is correct and that all the
connections are firm.
7. Inspect if the refrigeration system's pipelines run into other components, and any traces of leaking oil
at each connection.
8. Check and make sure the refrigeration system's circuit connector is firm, and any sign of circuit
disconnection.
9. Inspect if the compressor's fastening bolts are sturdy, reliable or flawed.
the refrigerant into the refrigeration system in the gas
form), and open the manifold pressure gauge's low
pressure valve.
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Airbags
Airbag Electronic Control Unit ..........................................214
Diagnostic Scanner ..........................................................215
Troubleshooting ................................................................216
Vehicle Collision Diagnostics ............................................226
Removal Method for Individual Components....................227
Driver Side Airbag Module (DAB), Front Passenger Side
Airbag Module (PAB), Clock Spring, and Steering Wheel ....228
Airbag Module Disposal....................................................230
Airbag’s Diagnostic Methods Without a
Diagnostic Scanner ..........................................................232
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Areas of Importance
1. While performing maintenance on the SRS airbag, make sure to work in accordance with this
chapter's steps and notes.
2. Be sure to use the specified test apparatus and SST (Special Service Tools) which are mentioned in this
chapter.
3. While performing maintenance on the following mentioned components, if there is any problem with a
component, be sure to replace it with a new one.
• Airbag ECU assembly.
• Clock spring assembly.
• Driver side airbag assembly.
• Front passenger side airbag module.
• Driver side preload seat belt.
• Front passenger side preload seat belt.
• Airbag wire harness.
4. While performing maintenance, please disconnect the battery's negative terminal connector, and then
after waiting for 60 s, commence operation. Furthermore, wrap up the removed negative terminal with
insulating tape.
After the battery power is cut off, the capacitor in the airbag ECU will still maintain a set amount of electrical
energy. If used without waiting a sufficient amount of time, it may lead to serious injury and accidents due to
the airbag's faulty deployment.
5. When painting the vehicle, excessive heat may influence the components, in which case the SRS-ECU,
airbag module, clock spring, etc., should first be removed and set aside\
.
Use a diagnostic scanner to clear the trouble code after the SRS airbag is repaired, as to ensure the warning
lamp will continue to work normaly.
Airbag Electronic Control Unit
Airbag warning lamp
Airbag ECU assembly 2
Front passenger side airbag assembly
Driver side airbag assembly
Diagnostic interface position
Driver side electronic pretensioner
Front passenger side electronic pretensioner
The position of the airbag warning
lamp inside the combination meter
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NO.Troubleshooting listExplanation
1Airbag system warning lamp not litAirbag system warns of circuit malfunction
2Airbag system warning lamp is always onAirbag system warns of circuit
malfunction or external malfunction
2. Airbag system warning lamp does not lit
Inspection
statusAirbag system warning lamp does not lit.
Possible
causes
• Voltage disappears (fuse open circuit)
• Combination meter malfunction
• Wire harness malfunction between the instrument cluster and ECU unit
Diagnostic procedures
While performing the first malfunction detection, it is suggested to wiggle the wire harness and plugs to check for
intermittent or poor contact. If there is, please check whether the plugs, terminals, and the wire harness are connected
properly and undamaged. If the above mentioned problems do not exist, pl\
ease take the following steps.
StepsInspectionOperation
1
Detect other wire harness and instrument cluster indicator
lamps
• Set the ignition switch to the ON position
• Are other warning and indicator lamps on?
Yes
Set the ignition switch to the LOCK
position, and then proceed to the
next step
No
Detect the instrument cluster's
power supply system and the
grounded system (fuse)
2
Inspect the light bulbs
Warning:
Incorrect airbag system component operation will cause the
airbag and preload seat belt to opened accidentally, which
may cause serious injuries. Please read the airbag system
services warning before working on the airbag components
• Set the ignition switch to the LOCK position
• Disconnect the battery's negative cable and maintain for at
least 60 s
• Remove the combination meter
• Check whether the two corresponding pins of the airbag
warning lamp are conducting
Yes
Go to the next step
No
Replace the combination meter
3
Detect the wire harness connection between the ECU unit and
the instrument cluster
• Set the ignition switch to the LOCK position
• Disconnect the battery's negative cable
• Disconnect the instrument cluster plugs
• Check whether the warning lamp's corresponding circuits
are conducting
YesGo to the next step
No
Replace the wire harness
Malfunction diagnosis and troubleshooting
1. Warning lamp is not on or always on
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3. Airbag system warning lamp is always on
2Airbag system warning lamp is always on
Inspection
status
Airbag system warning lamp is always on
Possible
causes
• Battery power supply is insufficient
• ECU internal malfunction
• Combination meter airbag warning lamp malfunction
• ECU plug is improperly connected
• Combination meter plug poorly contacted
• ECU power supply fuse circuit broken or poorly contacted
• Poor ECU plug terminal connection
• Poor wire harness contact between the ECU plug terminal and the ground
• Driver side or front passenger side airbag circuit malfunction
• Driver side and front passenger side preload seat belt malfunction
Diagnostic procedures
When starting inspection, please first use the specially designed diagnostic instrument (X - 431 diagnostic scanner)
and the ECU to diagnose the communication and determine the causes of malfunction. If communication fails,
please perform the following inspections
StepsInspection Operation
1
Examine the battery
• Check the battery voltage
• Is the voltage higher than 9 V?
Examine the charging/discharging system, and then go to step
5
YesGo to the next step
NoBattery power supply
is insufficient
2
Examine the conducting state of the wire harness between the
ECU unit and combination meter
• Set the ignition switch to the LOCK position
• Disconnect the battery's negative terminal
• Open the dashboard base
• Disconnect the instrument cluster connectors
• Connect the battery's negative
• Set the ignition switch to the ON position
• Check whether the corresponding connector terminal's
voltage is 12 V (power supply and meter connection)
YesGo to the next step
NoCheck the circuit, and then
go to step 5 after it is fixed
3
• Set the ignition switch to the LOCK position
• Check if the meter connector's corresponding terminal and
diagnostic interface's corresponding terminal are conducting
(diagnose the K wire's two ends)
YesGo to the next step
NoRepair or replace the wire
harness.Then go to step 5
4
B e s u r e t o d i s c o n n e c t t h e b a t t e r y ' s n e g a t i v e c a b l e a n d
maintain for at least 1 min
• Disconnect the ECU connector
• Disconnect the instrument cluster plugs
• Are the ECU connector terminal 25, 10, 46, and instrument
cluster's connectors conducting?
YesGo to the next step
NoReplace the wire harness,
and then go to step 5
5
Remove the ECU to check whether the terminal is in good
condition. Is the short-circuiting bar broken?
YesReplace the ECU
NoReconnect the ECU connector,
and then go to the next step
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StepsInspection Operation
6
Check and make sure the malfunction symptom does not
appear again after they are repaired
• Set the ignition switch to the LOCK position
• Disconnect the battery's negative cable and maintain for at
least 1 min
• Connect all of the ECU plugs
• Connect the airbag subassembly plugs at the driver side
• Connect the airbag subassembly plugs at the passenger side
• Connect the driver and passenger side preload seat belt plugs
• Connect the clock spring plugs
• Connect the battery's negative cable
• Set the ignition switch to the ON position
• Does the airbag warning lamp work properly?
Yes
After the malfunction
is removed, explain the
maintenance procedure
to the client
No
Recheck the malfunction
symptom, if the malfunction
happens again, repeat
the repairing procedures
starting from the first step
4. Internal malfunction
Type
code 0D
Trouble
code >80
SRS airbag system unit internal malfunction
Detecting
conditions
Warning
• This malfunction's diagnosis requires a trouble code not to be shown prior to inspection. Use a DTC
to perform inspection. Performing this malfunction detection might cause operator injury or system
damage due to incorrect operation. Therefore, before inspection, please properly prepare.
• SRS airbag system electronic control unit circuit internal malfunction
Possible
causesSRS airbag system unit internal malfunction
OperationReplace the SRS airbag system unit. Refer to airbag system and SRS airba\
g system unit removal and installation
5. Power supply
Trouble
code 12
and 42
The SRS airbag system electronic control unit's power supply voltage is \
out of the standard range
Detecting
conditions
Warning
• This malfunction's diagnosis requires that a trouble code not be shown prior to inspection. Use a
DTC to perform inspection. Performing this malfunction detection might cause operator injury or
system damage due to incorrect operation. Therefore, before inspection, please properly prepare.
• Voltage of the SRS airbag system unit's 5 and 6 connector pins is lower than 9 V
Possible
causes
• Battery voltage too low
The wire harness between the battery and SRS airbag system electronic control unit has a
malfunction
Diagnostic procedures
StepsInspectionOperation
1
Inspect the battery
Measure the battery voltage
Is the voltage higher than 9 V?
YesGo to the next step
NoBattery's voltage too low. Inspect
the charging/discharging system
2
Inspect the wire harness between the battery and the fuse box
Take out the fuse box making sure not to loosen the connector,
and set the ignition switch to the ON position
Is the fuse box's two corresponding terminal stub voltage higher
than 9 V?
YesGo to the next step
NoInspect and repair
the wire harness
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StepsInspectionOperation
3
Inspect the wire harness between the fuse box and SRS airbag
system unit connectors
Warning
If not handled properly, the airbag module and stretch tension
type seat belt may open or tense up, causing serious operator
injury. Therefore, before performing maintenance, please read
the maintenance warnings carefully.
See also airbag system maintenance warning
Set the ignition switch to the "LOCK" position
Loosen the battery's negative cable and wait for at least 1 min
Take out the steering column housing
Loosen the clock spring connector
Take out the glove box (with the front passenger side airbag
module)
Loosen the front passenger side airbag module connectors
Take out the dashboard base
Loosen all the SRS airbag system unit connectors
Install the battery's negative cable, and set the ignition switch to
the ON position. Is the airbag system unit's 25 and 11 connector
pin voltage higher than 9 V?
YesGo to the next step
NoReplace the wire harness
4
Set the ignition switch to the "LOCK" position
Loosen the battery's negative cable and wait for at least 1 min
Take out the left side inner decoration board
Disconnect the SRS airbag system unit switching connectors
Install the battery's negative cable, and set the ignition switch
to the ON position. Is the voltage of the switching connector's
corresponding pin and ground higher than 9 V?
Yes
[Current trouble code]
Replace the SRS airbag system
unit
See also SRS airbag system
SRS airbag system unit
removal/installation
[History trouble code]
Fault diagnosis complete
NoReplace the wire harness
6. Driver side malfunction
Type
code 02
Trouble
code
01, 02, 03
Driver side airbag malfunction (resistance too low or too high, short c\
ircuit grounded, etc)
Detecting
conditions
Warning
• If it's not handled properly, the airbag module and stretch tension type seat belt may open or tense
up, causing serious operator injury. Therefore, before performing maintenance, please read the
maintenance warnings carefully.
See also airbag system maintenance warning
If there is a driver side front airbag
• The resistance between the terminal stubs of the SRS airbag system unit connector is out of the
specified range
Wire harness related SRS driver side airbag is short or open circuited
Pos-
sible causes
• Driver side airbag module malfunction
• Clock spring internal malfunction
• Connector malfunction between the clock spring and SRS electronic control unit
• The wire harness between the clock spring and the SRS electronic control unit circuit is broken or
short circuited
• SRS driver side airbag generator connectors are improperly connected
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Diagnostic procedures
StepsInspectionOperation
1
Inspect the clock spring
Warning
If not handled properly, the airbag module may deploy
and cause serious operator injury. Therefore, before
maintenance, please read the maintenance warnings
carefully.
See also airbag system maintenance warning
Are the components relating to the clock spring work-
ing normally? (The relationship between each pin is
normal, no unnecessary short or open circuit, etc.).
NormalGo to the next step
Abnormal
Replace the clock spring
See also airbag system and clock
spring removal/installation
2
Check whether the malfunction is on the driver side
airbag module or other components
Replace with a good DAB module
Install the battery's negative cable
Set the ignition switch to the "ON" position
Is the trouble code still displayed? Or can it be cleared?
Yes
Replace the driver side
airbag module
See also airbag system and
driver side airbag module
removal/installation
NoGo to the next step
3
Inspect the clock spring's wire harness connectors
Set the ignition switch to the "LOCK" position
Loosen the battery's negative cable and wait for at least
1 min
Take out the steering column housing
Loosen the clock spring connector
Is the clock spring working normally?
NormalGo to the next step
AbnormalReplace the wire harness
4
Check whether the malfunction is on the clock spring
or other components
Set the dedicated detector at 2 Ω position
Install the battery's negative cable
Set the ignition switch to the "ON" position
Is a trouble code displayed?
YesGo to the next step
No
Replace the clock spring
See also airbag system and clock
spring removal/installation
5
Check the wire harness between the clock spring and
SRS electronic control unit
Set the ignition switch to the "LOCK". position
Loosen the battery's negative cable and then wait for at
least 1 min
Take out the glove box (with the front passenger side
airbag module)
L o o s e n t h e f r o n t p a s s e n g e r s i d e a i r b a g m o d u l e
connectors
Take out the dashboard base
Loosen all the SRS airbag system unit connectors
Check the wire harness of the connectors and terminal
studs between the SRS airbag system electronic control
unit and the clock spring to determine whether they
have the following problems
• Ground
• Short connected with the power supply
• Open circuit
Is the above wire harness normal?
Normal
Replace the SRS airbag system
unit
See also SRS airbag system
SRS airbag system unit removal/
installation
AbnormalReplace the wire harness
6
Check the clock spring connector
Loosen the clock spring connector
Is the clock spring connector normal?
NormalGo to the next step
AbnormalReplace the wire harness
or connectors
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StepsInspectionOperation
7
Inspect the clock spring
Take the clock spring off
See also airbag system and clock spring removal/
installation
Inspect the clock spring
See also airbag system and clock spring inspection
Check the clock spring. Is it normal?
NormalGo to the next step
Abnormal
Replace the clock spring
See also airbag system and clock
spring removal/installation
8
Check the wire harness between the clock spring and
SRS electronic control unit
Set the ignition switch to the "LOCK" position
Loosen the battery's negative cable and then wait for at
least 1 min
Take the glove box off (with the front passenger side
airbag)
L o o s e n t h e f r o n t p a s s e n g e r s i d e a i r b a g m o d u l e
connectors
Take out the dashboard base
Loosen all the SRS airbag system unit connectors
Check the wire harness of the connectors' terminal
studs between the SRS electronic control unit and the
clock spring to see whether they have the following
problems.
• Ground
• Short connected with the power supply
• Open circuit
Is the above wire harness normal?
Normal
Replace the driver side
airbag module
See also SRS airbag system
Driver side airbag module
removal/installation
AbnormalReplace the wire harness
7. Front passenger side malfunction
Type code 02
Trouble code
01, 02, 03
Front passenger side airbag module (resistance too low or too high, sho\
rt circuit, or grounded)
Detecting
conditions
Warning
• If not handled properly, the airbag module and stretch tension type seat belt may open or tense up,
causing serious operator injury. Therefore, before performing maintenance, please read the mainte-
nance warnings carefully.
See also airbag system maintenance warning
If there is a front passenger side airbag
• The resistance between the SRS airbag system unit connector's 3 and 4 pin is out of the specified
range
• The wire harness between the SRS airbag system unit connector’s 3 and 4 pins is short-circuited
• The SRS airbag system unit connector's 1 and 2, and 3 and 4 pins are open-circuited, if there is no
front passenger side airbag
Possible
causes
• Front passenger side airbag module malfunction
• Connector between the front passenger side airbag module and the SRS airbag system electronic
control unit malfunction
• Connectors between the SRS airbag system unit and the grounded point malfunction
• Circuit between the front passenger side airbag module and the SRS airbag system electronic control
unit is broken or short circuited
• Circuit between the SRS airbag system unit and the grounded point is broken or short circuited
• SRS airbag system unit malfunction
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Diagnostic procedures
StepsInspectionOperation
1Is the vehicle equipped with a front passenger side
airbag module?
YesGo to the next step
NoLine fault, inspect the wire harness
2
Check the front passenger side airbag module connec-
tor warning
• If not handled properly, the airbag module may deploy
and cause serious operator injury. Therefore, before
maintenance, please read the maintenance warnings
carefully.
See also airbag system maintenance warning
Set the ignition switch to the "LOCK" position
Loosen the battery's negative cable and wait for at least
1 min
Take the glove box off
Loosen the front passenger side airbag module connec-
tors
Is the front passenger side airbag module connector
normal?
Normal
[Current trouble code]
Go to the next step
[History trouble code]
Go to the next step
AbnormalReplace the wire harness
3
Check whether the malfunction is on the front passen-
ger side airbag module or the other components
Connect a good module with the front passenger side
airbag module connector's A and B terminal studs
Connect the battery's negative cable
Set the ignition switch to the "ON" position
Is a trouble code displayed?
YesGo to the next step
No
Replace the front passenger side
airbag module
See also airbag system and front
passenger side airbag module re-
moval/installation
4
Inspect the wire harness between front passenger side
airbag module and SRS airbag system electronic con-
trol unit
Set the ignition switch to the "LOCK" position
Loosen the battery's negative cable and then wait for at
least 1 min
Take the steering column housing off
Loosen the clock spring connector
Loosen the driver side and front passenger side airbag
module connectors
Take out the dashboard base
Loosen all the SRS airbag system unit connectors
Inspect the circuit between the connector terminal stubs
of SRS airbag system electronic control unit and front
passenger side airbag module, and check if it has the
following problems
• Ground
• Short connected with the power supply
• Open circuit
Is the related wire harness normal?
Normal
[Current trouble code]
Replace the SRS airbag system
unit
See also SRS airbag system
SRS airbag system unit removal/
installation
[History trouble code]
Fault diagnosis complete
AbnormalReplace related wire harness