Downloaded from www.Manualslib.com manuals search engine 223Airbags
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
Downloaded from www.Manualslib.com manuals search engine 225Airbags
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
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Vehicle Collision Diagnostics
Whether the airbag is deployed or not, vehicle collision diagnostic and maintenance must be conducted
according to the following procedures.
1. Check the SRS-ECU diagnostic signal
(a) Connect the diagnostic connector (X-431 diagnostic scanner).
(b) Read the diagnostic result with the X-431 diagnostic.
Caution: Due to impact, and when the battery's power supply is insufficient, the scanner will be unable
to communicate with the SRS-ECU. At this time, use an external power supply, or make sure to
perform inspection and maintenance on the dashboard's wire harness.
2. Maintenance sequence
When the airbag is deployed, the following components should be replaced\
.
(a) Driver side airbag module.
(b) Front passenger side airbag module.
(c) SRS-ECU.
(d) Driver side and front passenger side preload seat belts.
Inspect the following components, if anything is abnormal, replace with \
a new one.
(a) Clock spring.
(b) Steering wheel, steering column, and steering lower shaft components.
Installation status of the driver side airbag module regarding the steer\
ing wheel.
(a) Inspect whether the steering wheel's noise is abnormal, for improper movement, or abnormal cleara\
nce.
(b) Inspect whether the wire harness connectors are broken and whether the terminals are deformed.
3. SRS-ECU
(a) Inspect whether the SRS-ECU housing and bracket are
sunken or depressed, cracked, deformed, etc.
(b) Inspect for broken connectors as well as deformed
terminals.
(c) Inspect the SRS-ECU bracket's installation status.
• Inspect whether the cover is sunken or depressed,
cracked, deformed, etc.
• Inspect for broken connectors as well as deformed
terminals and biting wire harnesses.
• Check whether the gas generator's housing is sunken or
depressed, cracked, deformed, etc.
• Inspect whether the arrow's direction is pointed towards
the front of the vehicle.
(d) Inspect the airbag module's installation status.
4. Inspect the driver side airbag module
5. Clock spring
(a) Inspect for broken connectors and protective tube and deformed terminals.
(b) Inspect for deformed housing.
6. Steering wheel, steering column, and lower shaft components
(a) Inspect the driver side airbag module's installation status.
(b) Inspect the steering wheel for abnormal noise, and whether the clearance is normal.
7. Inspect the wire harness connectors (dashboard wire harness).
8. Inspect whether the wire harnesses are firm. Check for damaged connectors, and deformed terminals.
Warning label
The driver side, clock spring, SRS-ECU, and front passenger side airbag, all have warning labels, with the
caution areas shown by an image. While maintenaning and using the SRS airbag, please work in accordance
with the label.Furthermore, when a label becomes damaged or dirty, please replace it with a new one.
Downloaded from www.Manualslib.com manuals search engine 227Airbags
Removal Method for Individual Components
SRS airbag system electronic control component (SRS-ECU)
1. Areas of Importance
(a) After taking off the battery's negative (-) terminal, wait for 60 s before operating. Wrap the removed
negative (-) terminal in tape to insulate it.
(b) The SRS-ECU can not be dismantled or repaired. If there is any malfunction, please replace it with a new
one.
(c) Do not let the SRS-ECU vibrate or collide with anything. If sunken or depressed, cracked, deformed, etc.,
please replace with a new SRS-ECU.
(d) Every time the airbag is deployed, please replace with a new SRS-ECU.
(e) Do not knock the SRS-ECU while removing or performing maintenance on the SRS-ECU's surrounding
components.
2. Operation before removal
(a) Set the ignition switch to the LOCK position.
(b) After taking off the battery's negative (-) terminal, put them in a proper place or wrap them in\
tape.
3. Removal sequence
(a) Remove the auxiliary facia console.
(b) Reomve the connectors connected with the airbag ECU.
(c) Remove the SRS-ECU.
4. Installation sequence
(a) SRS-ECU.
(b) Install the connectors connected with the airbag ECU.
(c) Dashboard base.
(d) Connect the battery's negative (-) terminal.
5. Installation points
(a) Install the SRS-ECU
Caution: If SRS-ECU isn't installed correctly, the SRS airbag will not operate properly.
(b) Inspection after installation
• Set the ignition switch to the ON position.
• SRS warning lamp stays on for 6-7 s.
• If the lamp does not turn off, malfunction inspection and troubleshooting should be performed.
6. Inspection
(a) Whether the SRS-ECU cover has sunken or depressed, cracked, deformed, etc.
(b) Whether the connectors are damaged or deformed.
Caution: Please replace with a new SRS-ECU, if there is any sunkeness or depression, cracking, de-
formity, etc.
Except for the areas described above, to perform SRS-ECU inspections, please refer to the related troubleshooting
contents.
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Alignment area
(a) Whether there are broken connectors or protective
pipes and deformed terminals.
(b) Whether the housing is damaged.
(c) Inspect whether the clock spring's upper connector
terminal and lower corresponding connector terminal is
conducting.
Clock spring central involution
Screw in the clock spring clockwise all the way, and then
turn it 3.5 circles in the reverse direction, until the position
pin's block boss matches the block hole (as shown on the
left).
Caution: If the clock spring is not in the involution
central, the steering wheel will be unable to rotate
midway or cause clock spring circuit failure, which will
obstruct the normal operation of the SRS airbag.
6. Steering wheel and airbag module subassembly installation
(a) After pulling out the clock spring's position pin, install the steering wheel and airbag module su\
bassembly.
Caution: While installing the steering wheel and airbag module subassembly, please do not block the
clock spring wire harness.
(b) After installation, try to turn the steering wheel left and right to its proper position, and check for anything
abnormal.
7. Inspection after installation
(a) Lightly turn the steering wheel left and right to check whether there is anything abnormal or for any
strange noise. (Driver side airbag module, clock spring).
(b) Set the ignition switch to the ON position.
(c) The SRS warning lamp will remain on for 6-7 s and will then die out.
(d) If the warning lamp is always on or shows other symptoms after 6-7 s, troubleshooting must be perf\
ormed.
(e) Inspect whether the clock spring circuit is open circuited. If yes, please replace it with a new \
one.
(f) If no, check the other circuits.
Airbag Module Disposal
While discarding the airbag module or a vehicle carrying a SRS airbag, please discard according to the following
steps.
Discarding essentials of the airbag module before deployment
1. Deploy the airbag before discarding SRS airbag.
2. Deploy the airbag outside the vehicle when replacing the airbag module.
3. There may be some smoke when deploying the airbag, so make sure to operate near a smoke
detector.
4. When deploying the airbag, the sound will be very loud. Please ask nearby people to plug their ears,
and try not to operate near residential areas.
Airbag deployment
Wa r n i n g : T h e f o l l o w i n g s t e p s c a n p r e v e n t s t a t i c
electricity trigged accidental deployment, so please
carefully follow them.
1. Park the vehicle on a flat surface.
2. 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 a n d p o s i t i v e
terminals, and remove the battery from the car.
Caution: Avoid wearing apparel which may generate
friction due to electricity. Disconnect the battery's
p o s i t i v e a n d n e g a t i v e t e r m i n a l s , a n d c o m m e n c e
operation after waiting 60 s.
3. Remove the airbag module according to the driver side
airbag's normal removal procedures.
1
2
3
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Airbag’s Diagnostic Methods Without a Diagnostic Scanner
Airbag indicator lamp warning
Check the airbag ECU connectors for looseness, check for warnings after correct installation.
Inspect whether the clock spring is conducting
Go to a professional maintenance station to perform inspection
Disconnect the front passenger side seat belt pretensioner wires and replace it with a 2 Ω resistor to see whether airbag warning lamp is still on.
Disconnect the driver side seat belt pretensioner wires and replace it with a 2 Ω resistor to see whether airbag warning lamp is still on.
Disconnect the front passenger side airbag line and replace it with a 2 Ω resistor to see whether airbag warning lamp is still on.
D i s c o n n e c t t h e d r i v e r s i d e a i r b a g l i n e a n d replace it with a 2 Ω resistor to see whether airbag warning lamp is still on.
Check whether the alarm continues after replacing the clock spring
No
No
No
No
NoNo
Yes
Yes
Downloaded from www.Manualslib.com manuals search engine 265Vehicle Body
3. Install the C-pillar protector.
General Instructions and Operations of Seat Belt
Front seat belt warning:
The front seat belts are equipped with seat belt indicator. The driver seat belt indicator is located on the dash-
board and that of the front passenger is on the air conditioner panel. If the ignition switch is on but the front pas-
senger does not fasten the seatbelts, the indicator will turn on.
Preload three-point type belt retractor:
The front seat belts utilize preload three-point type belt retractors. The preload three-point type belt retractor is
loose, enabling the passenger to move freely unless there is an emergency, such as emergency braking, hard ac-
celeration, or hard turning.
Operation notice and function examination:
Areas of Importance
If the seat belt retractor is installed incorrectly, the seat belt will lose its function in the event of an accident, and
thus fail to protect the passenger!
Prevent sharp and harmful substances from touching the seat belt.
Avoid winding or breaking the seat belt lock tongue and seat belt lock bu\
tton.
Do not bleach or dye the seat belt woren band. Wash it with neutral liquid soap and water only.
Before installing the seat belt mounting bolt, manually tighten the seat\
belt bolts to avoid improper clipping.
Do not repair the seat belt retractor or seat belt lock button. If the seat belt is broken, the seat belt assembly must
be replaced.
Change the broken or damaged seat belt.
Function examination:
1. Check whether all the seat belt mounting bolts are tightened.
2. Check the seat belt lock button. The lock button should be unlocked and able to lock easily.
3. After locking the seat belt, the seat belt lock tongue can no longer loo\
sen.
4. Pull all the seat belts out. Seat belts cannot have knots or tears.
5. The belt should retract smoothly but not roughly.
Warning:
Different metals making direct contact will accelerate corrosion. Make sure to use the correct fastening
piece to avoid premature corrosion!
4. Install the seat belt lower mounting bolt.
Lower mounting bolt
Side sheet metal
C-pillar protector