2008 GEELY FC airbag

Malfunction display of SRS could confirm originally by the flash of indicating light, detailed information
could be gained by malfunction diagnostic tool.
a. Safety airbag indicating light is driven by ECU, all malfunction displays are finished by ECU. After
working voltage is supplied for safety airbag controller (KD4.1) by battery, safety airbag controller
(KD4.1) illuminates indicating light to check SRS. To notify driver that there are some malfunctions
in system, indicating light will illuminate for long time after working voltage is supplied. If existing
SRS does not have any malfunction, indicating light will close after illuminating for five seconds
after ignition on. In original phase, safety airbag controller (KD4.1) does not prepare to check the
impact and stop the unfold until the wire of safety airbag controller (KD4.1) is reliable.
After ignition switch is turned to “ON” gear, the display type of indicating light when there is no any
malfunction in SRS is:
Assembling malfunction information of subassembly could see follow table 1.
Table1: Assembling malfunction information indicating table for airbag subassembly
Schematic drawing for slow flash indicating light
Supplemental restraint system--Malfunction treatment
 245 
Ignition switch “ON”
Illuminate
Extinguish NumberMalfunction type
Slow flash times (N times)Remark
1Igniter at the side of driver happens short circuit3
2Igniter at the side of driver happens open circuit4
3Igniter at the side of driver connects grounding5
4Igniter at the side of driver connects battery6
5
Igniter at the side of passenger happens short circuit7
6
Igniter at the side of passenger happens open circuit8
7
Igniter at the side of passenger connects grounding9
8Igniter at the side of passenger connects battery10
9
Safety belt at the side of driver happens pre-tightening malfunction11
10
Safety belt at the side of passenger happens pre-tightening malfunction12
12Impact output interface happens malfunction
or wrong explosion
of airbag subas-
sembly will make
big hurt for human,
its warning rea-
sons should be di-
vided detailedly.

Supplemental restraint system--Repair
Repair
a. In using process, if happening any malfunction of power supply, it shows the voltage of power supply
is less than 9V or higher than 18V, or the battery is damaged, at this time, it only needs to charge or
change the battery.
b. Use special malfunction diagnostic tool to test.
Malfunction codes approved by safety airbag controller (KD4.1)
Number Malfunction specification Remove
1Ignition circuit 1 (safety airbag at the side of driver), the resistance is too high or open circuit.OK
2
Ignition circuit 1 (safety airbag at the side of driver), the resistance is too low or short circuit.OK
3
Ignition circuit 1 (safety airbag at the side of driver), connects with the groundingOK
4
Ignition circuit 1 (safety airbag at the side of driver), connects with power supplyOK
5
Ignition circuit 2 (safety airbag at the side of passenger), the resistance is too high or open circuit.OK
6
Ignition circuit 2 (safety airbag at the side of passenger), the resistance is too low or short circuit.OK
7
Ignition circuit 2 (safety airbag at the side of passenger), connects with the groundingOK
8
Ignition circuit 2 (safety airbag at the side of passenger), connects with power supply.OK
9
Ignition circuit 3 (pre-tension safety belt at the side of driver), the resistance is too high or open circuit.OK
10
Ignition circuit 3 (pre-tension safety belt at the side of driver), the resistance is too low or short circuit.OK
11
Ignition circuit 3 (pre-tension safety belt at the side of driver), connects with the groundingOK
12
Ignition circuit 3 (pre-tension safety belt at the side of driver), connects with the power supplyOK
13
Ignition circuit 4 (pre-tension safety belt at the side of passenger), the resistance is too high or open circuit.OK
14 Ignition circuit 4 (pre-tension safety belt at the side of passenger), the resistance is too low or short circuit. OK
15
Ignition circuit 4 (pre-tension safety belt at the side of passenger), connects with the groundingOK
16
Ignition circuit 4 (pre-tension safety belt at the side of passenger), connects with power supplyOK
17
Voltage of power supply is too highOK
18
Voltage of power supply is too lowOK
19
Malfunction of indicating light connects with power supply or bulb is short circuit.OK
20 Malfunction of indicating light connects with the grounding or filament is open circuit. OK
21
Lack/wrong calculation rule parametersNo (change safety airbag
controller (KD4.1))
22Front impact has been recordedNo (change safety airbag
controller (KD4.1))
23
Communication malfunctionOK
24
Inner malfunctionNo (change safety airbag
controller (KD4.1))
25
Impact output (oil pump) pin connects with the groundingOK
26
Impact output (oil pump) pin short connects with power supplyOK
27
Impact output (central control door lock) pin connects with the groundingOK
28
Impact output (central control door lock) pin connects with power supplyOK
29
Pre-tension safety belt ignites independentlyOK, but most is five times
30
Pre-tension safety belt ignites six times independentlyNo (change safety airbag
controller (KD4.1))
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cthere are some malfunctions, indicating light will indicate them. If exterior malfunctions are historical,
after they are removed, indicate will disappear.
done displayed or historical malfunction is only set up again by server. Inner malfunction or “impact
record” of safety airbag controller (KD4.1) could not be set up again, in this situation, it is necessary to
change safety airbag controller (KD4.1).
(3) micro controller, independent indicating light illuminates.
Microprocessor having obvious malfunction state could not work, so it could not control the work of indicat-
ing light. In this situation, indicating light will illuminate directly by applicable circuit without considering the
micro-processor, liking that shown in following:
zThe battery providing electricity for safety airbag controller (KD4.1) disables: indicating light illumi-
nates by the automatic light driving function.
zInner working voltage loses: indicating light illuminates usually.
zNew setup caused by the unsuccessful watchdog trigger: indicating light flashes
zMicro-processor does not work: indicating light illuminates usually
zInsert of connecter of safety airbag controller (KD4.1) is wrong: indicating light illuminates usually by
short circuit stick.
Take example to specify diagnostic step:
If finding indicating light of safety airbag illuminates usually, even if it extinguishes at last, you could check
by follow step. First is to check the part happening malfunction with diagnostic tool.
Then make by the checking step for corresponding position.
a. If scan result is inner malfunction or safety airbag has exploded, at this time, change the ECU directly.
b. Malfunction has been removed.
Supplemental restraint system--Repair
 248 

Inspection
I. The inspection for airbag module at the side of
driver could be divided into three situations:
Automobile is not impacted, automobile is impacted but
airbag does not explode, and automobile is impacted and
airbag explodes.
1. Automobile is not impacted:
a. Make malfunction diagnostic inspection,
b. Check the safety airbag assembled on steering wheel
with your eyes,
including following items mainly:
Check whether the airbag has any cut, small crack or the surface and concave slot of airbag has
obvious changed color.
2. Automobile is impacted but airbag does not explode:
a. Make malfunction diagnostic inspection,
b. Check the disassembled safety airbag with your eyes, including following items mainly:
Check whether the airbag has any cut, small crack or the surface and concave slot of airbag has
obvious changed color.
Check whether wiring harness has any cut, crack or joint has any flaw,
Check whether steering wheel has distorted,
Check whether the plug and wiring harness of helix cable has been damaged, the loudspeaker wiring
harness plug and wiring harness has been damaged or distorted,
Check whether contacting board of steering wheel loudspeaker button has been distorted (if it has
been distorted, it is necessary to change with new safety airbag module, forbid repairing it),
Interruption situation could happen between safety airbag module and steering wheel lower defend-
ing cover, and when new airbag module is assembled on steering wheel, its surrounding clearance
must be even (Assemble and disassemble of driver airbag module should accord with correct step to
work).
3. Automobile is impacted and airbag explodes:
a. Make malfunction diagnostic inspection,
b. Check the disassembled safety airbag with your eyes, including following items mainly:
Check whether the plug and wiring harness of helix cable has been damaged, the loudspeaker wiring
harness plug and wiring harness has been damaged or distorted,
Check whether wiring harness has any cut, crack or joint has any flaw,
Check whether steering wheel has distorted,
Interruption situation could happen between safety airbag
module and steering wheel lower defending cover, and
when new airbag module is assembled on steering wheel,
its surrounding clearance must be even (Assemble and
disassemble of driver airbag module should accord with
correct step to work)
II. The inspection for airbag module at the side of
passenger could be divided into three situations:
Automobile is not impacted, automobile is impacted but
airbag does not explode, and automobile is impacted and
airbag explodes.
Supplemental restraint system--Inspection
Safety airbag module at
the side of passengerChange the
wiring harness
of airbag
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Supplemental restraint system--Inspection
1. Automobile is not impacted:
a. Make malfunction diagnostic inspection,
b. Check the safety airbag assembled on panel framework with your eyes, including following items
mainly:
Check whether the airbag has any cut and small crack, the surface and concave slot of airbag has
obvious changed color, and connecting bolts are loosened.
2. Automobile is impacted but airbag does not explode:
a. Make malfunction diagnostic inspection,
b. Check the disassembled safety airbag with your eyes, including following items mainly:
Check whether the airbag has any cut, small crack or the surface and concave slot of airbag has
obvious changed color.
Check whether wiring harness has any cut, crack or joint has any flaw.
Check whether connecting bolt between airbag module and panel framework has been loosened, weld-
ing part of assemble bracket has any crack or distortion, and Assemble and disassemble of passenger
airbag module should accord with correct step to work.
3. Automobile is impacted and airbag explodes:
a. Make malfunction diagnostic inspection,
b. Check the disassembled safety airbag with your eyes, including following items mainly:
Check whether panel has any distortion and crack;
Check whether wiring harness of safety airbag has any cut, crack or the joint has any flaw;
If there is any crack on connector between panel and safety airbag, it is necessary to change it with
new product;
When new airbag module is assembled on its position, its surrounding clearance should be even
(Assemble and disassemble of passenger airbag module should accord with correct step to work).
III. Inspection for safety airbag controller could be divided into two situations: automobile
is not impacted, and automobile is impacted but airbag does not explode.
1. Automobile is not impacted: make system inspection.
2. Automobile is impacted but airbag does not explode:
a. Make system inspection.
b. Check safety airbag controller with your eyes:
Whether the bracket has any concave, crack, distortion and so on;
Whether zincification layer of bracket is damaged;
Whether the exterior casing of controller has any crack, concave or distortion;
Whether the joint is damaged, the terminal is distorted, or wiring harness is bitten.
IV. Inspection for wiring harness.
a. Make system inspection.
b. Check whether all wiring harnesses of safety airbag (SRS) has been damaged or lead wire are exposed,
joint has been damaged, and terminal has any distortion or crack.
Hint: wiring harness of safety airbag combines with the wiring harness of whole automobile,
but the wiring harness of safety airbag is yellow.
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Supplemental restraint system--Remove malfunction
Remove malfunction
Malfunction table
lThe voltage disappears (fuse is cut off)
l Combination instrument happens malfunction
lWiring harness between instrument package
and ECU unit has malfunction Malfunction Test statePossible reason
Indicating light of
safety airbag
system does not
illuminateWarning circuit of safety
airbag system happens
malfunction
1. Indicating light of safety airbag system does not illuminate
Diagnostic procedure
When making first malfunction test, we advise shaking wiring harness and plug to test whether there is
discontinuous bad contact in wire, if having this problem, please verify whether the connection of plug, terminal
and wiring harness is correct and is not damaged, if it is not this problem, please make by next step.
(1) Check other wiring harnesses and indicating lights of instrument package
a. Set ignition switch at ON position,
b. Are other warning indicating lights illuminating?
If illuminating: set ignition switch on LOCK position, then make next operation.
If not: check the power supply system and grounding system of instrument package (fuse), then
make step 5.
(2) Check the bulb
Warning: wrong treatment for safety airbag system parts will incur safety airbag and pre-
tension safety belt are opened accidentally, this might happen heavy accident. Please read
service warning of safety airbag system before disposing safety airbag parts.
a. Set ignition switch at LOCK position,
b. Cut off cathode wire of battery and keep this state for 60 seconds at least,
c . Disassemble combination instrument,
d. Measure whether corresponding two pins of indicating light of safety airbag could conduct,
Yes: make next step,
No: change the bulb of indicating light.
(3) Check the wiring harness connection between ECU unit and instrument package .
a. Set ignition switch at LOCK position,
b. Cut off cathode wire of battery,
c . Cut off the plug of instrument package ,
d. Check whether corresponding circuit of indicating light could conduct,
Yes: make next step,
No: change the wiring harness, then make step 5.
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Number Malfunction removing itemSpecification
1 Indicating light of safety airbag system does not illuminate Warning circuit of safety airbag system happens malfunction
2 Indicating light of safety airbag system illuminates usually Warning circuit of safety airbag system happens malfunction or
there is exterior malfunction

Supplemental restraint system--Remove malfunction
Diagnostic procedure
When starting to check, firstly, use special diagnostic tool and ECU to make diagnostic communication to
find the reason of malfunction, if communication could not implement, make following inspection:
(1) Check the battery
a. Measure the voltage of battery
b. Is the voltage higher than 9V?
Yes: make next operation,
No: Power supply of battery is lack, check the charging/discharging system, then make step 5.
(2) Check the conduction of wiring harness between ECU and combination meter.
a. Set ignition switch at LOCK position,
b. Cut off cathode of battery,
c. Open the defending board of central channel,
d. Disconnect the connector of instrument package ,
e. Connect the cathode of battery,
f. Set ignition switch at ON position,
g. Check whether the terminal voltage of corresponding connector of instrument is 12V (connecting
wire of power supply and instrument)
Yes: make next step,
No: check the circuit part, then make step 5 after repairing it.
h. Set ignition switch at LOCK position,
i. Check whether the corresponding terminal of instrument connector conducts with corresponding
terminal of diagnostic interface (diagnose two ends of K wire),
Yes: make next step,
No: repair or change the wiring harness, then make step 5.
j. Guarantee cathode of battery is cut off and keep this state for one minutes at least, cut off connec-
tor of ECU.
k . Disconnect the plug of instrument package,
l. Check whether it conducts between ECU plug voltage, K wire, airbag indicating light terminal and
plug of instrument package ?
Yes: make next operation,
No: change the wiring harness, then make the step 5.
m. Disassemble the ECU to check whether the terminal is good, and the short circuit stick is broken.
Yes: change the ECU,
No: connect the ECU connector again, then make next operation.
zPower supply of battery is lack
zECU has inner malfunction
zIndicating light of combination meter safety airbag has
malfunction
zPlug connection of ECU has malfunction
zPlug of combination meter contacts badly
zPower supply fuse of ECU is cut off or contacts badly
zPlug terminal of ECU contacts badly
zWiring harness between plug terminal and grounding of
ECU contacts badly
zSafety airbag circuit at the side of driver or passenger
has malfunction. Malfunction Test statePossible reason
Indicating light of
safety airbag sys-
tem illuminates
usuallyIndicating light of safety
airbag system illumi-
nates usually
2. Indicating light of safety airbag system illuminates usually
 252 

(3) Confirm the malfunction will not happen again after repairing,
a. Set ignition switch at LOCK position,
b. Cut off cathode of battery, and keep this state for one minutes at least,
c. Connect all ECU plugs,
d. Connect the subassembly plug of safety airbag at the side of driver,
e. Connect the subassembly plug of safety airbag at the side of passenger,
f. Connect the plug of pre-tension safety belt at the side of driver and passenger,
g. Connect the plug of helix cable,
h. Connect the cathode of battery,
i. Set ignition switch at ON position,
j. Does the indicating light of safety airbag work correctly?
Yes: malfunction has been removed, and the repair procedure should be explained for customers,
No: Check the malfunction state again, then if malfunction happens again, repeat from step 1.
3. Inner malfunction
Inner malfunction of safety airbag system unit
Test conditionWarning
zTest condition for this malfunction is the malfunction code which does not happen
before checking, DTC makes the inspection, it might incur wrong operation to hurt
human or system when making this inspection, so it is necessary to make preparation
before the inspection.
zInner circuit of electronic control unit of safety airbag system has malfunction.
Power voltage of electronic control unit of safety airbag system is too low.
Test conditionWarning
zTest condition for this malfunction is the malfunction code which does not happen
before checking, DTC makes the inspection, it might incur wrong operation to hurt
human or system when making this inspection, so it is necessary to make preparation
before the inspection.
zThe voltage of safety airbag system unit and the grounding connector pin is less than
9V.
Possible reasonzThe voltage of battery is too low.
The wiring harness between battery and electronic control unit of safety airbag system
has malfunction.
4. Malfunction of power supply
Supplemental restraint system--Remove malfunction
 253 
Possible reason
OperationInner malfunction in safety airbag system unit
Change the safety airbag system unit, referring to the disassembling and assembling of
safety airbag system and safety airbag system unit.