2008 GEELY FC ECU

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
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(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
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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.

Diagnosis of impacted automobile
No matter whether the safety airbag has been unfolded, the inspection and maintenance for impacted auto-
mobile should be made by following sequence.
1. Check the ECU diagnostic signal.
(1) Connect the diagnostic joint of diagnostic tool,
(2) Use diagnostic tool to read the diagnostic result.
2. Repair sequence
Note: For the impact, when power supply of battery is lack, diagnostic tool could not communicate
with ECU, at this time, it is necessary to check and maintain the wiring harness of panel or use
exterior power supply.
(1) When safety airbag has been unfolded,
Following parts should be changed with new ones
a. Safety airbag assembly at the side of passenger
b. ECU
c. Safety airbag assembly at the side of driver
d. Pre-tension safety belt at the side of driver and passenger
Check the following parts, if they are abnormal, change them with new ones
a. Helix cable
b. Steering wheel, steering column, combination switch
Assembling state for steering wheel of safety airbag assembly at the side of driver
a. Check whether there is any abnormal noise in steering wheel, its action is flexible and clearance is
normal.
b. Check whether the joint of wiring harness is damaged or terminal is distorted.
Supplemental restraint system--Remove malfunction
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Supplemental restraint system--Disassemble and assemble
Disassemble and assemble
Electronic control unit of safety airbag (ECU)
1. Note (referring to chapter 1)
2. Disassembling sequence:
(1) Disassemble the cover board at the side of central channel (or disassemble auxiliary panel).
(2) Disassemble the connector connecting with safety airbag ECU.
(3) Disassemble the ECU.
3. Assembling sequence
(1) Check the ECU assembly, and make arrow direction on hint card point to running direction of automobile.
(2) Assemble the connector connecting with safety airbag ECU, the connector should be locked firmly (if
you hear a light sound “KA” when press the connector, this shows it has been locked).
a. Fix the special bolt used by controller assembly on assembling position of central channel, and
confirm it has been assembled firmly.
b. Assemble the cover board at the side of central channel (or assemble auxiliary panel).
c. Connect the cathode of battery.
4. Main notes of assembling operation:
(1) When assembling ECU assembly, pay attention to that ECU assembly could not be impacted.
(2) Inspection after the assembling
a. Set the ignition switch at ON position.
b. Indicating light illuminates at 7 second, and continues to extinguish.
c. If it does not extinguish, it is necessary to check and remove malfunction.
Note: if ECU could not be assembled correctly, safety airbag will not work normally.
5. Inspection: referring to chapter 2.
6. Removing malfunction: referring to chapter 3.
3. Place the steering wheel and front wheels correctly
and make them face the front, and take out ignition
switch key, then do not operate it in 60 seconds af-
ter disassembling the cathode of battery.
4. Disassemble safety airbag assembly at the side of
driver:
(1) Guarantee the wheels face the front.
(2) Use 5s hexagon socket-head wrench to loosen the two plan-
etary bolts.
(3) Pull out the safety airbag assembly at the side of driver
from upside of steering wheel.
Safety airbag assembly at the side of driver
1. Note (referring to chapter 1).
2. Use the flash or malfunction diagnostic tool to test malfunction (referring to chapter 1
and 3).
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Scrap treatment for safety airbag
Hint:
zWhen scraping a automobile with SRS or disposing safety airbag module, it is necessary to explode the airbag by
following steps at first.
zIf there is any abnormal phenomenon when exploding airbag, please contact with our service store or automobile
factory in time.
Note:
z Forbid exploding the safety airbag module that does not explode by yourself.

zWhen exploding the airbag, it will make much big explosive sound, so it is necessary to operate this out of the
automobile, please do not make this operation influence the life of near habitants to avoid their complaints.

zWhen exploding the airbag, use the battery as power supply whose voltage is (12±1)V.
zWhen exploding the airbag, operator should be apart from the exploded module and he should confirm there is
not anyone in the scope of 10m at least.

z When disposing the exploded airbag module, it is necessary to wear glove and safety glass.

zWhen airbag is exploded, the temperature of airbag module is too high, and a lot of gas with peculiar smell will
be produced, so do not make any treatment for exploded airbag in 30 minutes after exploding it.
zPlease wash your hands with water after finishing those operations above.
zDo not sprinkle water on exploded airbag module.
zWhen scraping a automobile, the safety airbag module assembled on automobile should be exploded.
I. Scrap the safety airbag module on automobile
1. Treatment before exploding:
(1) Park the automobile on flat place.
(2) Disassemble the cathode and anode of battery and disassemble the battery from automobile.
Note: do not work until disassembling the cathode and anode of battery for 60 seconds.
(3) Safety airbag assembly should be unfolded by following sequence.
2. Safety airbag assembly at the side of driver
(1) Disassemble three screws and lower cover of combination switch.
(2) Disassemble the lower end of helix cable and the joint connecting with panel wiring harness.
(3) Connect the conversion wiring harness of safety airbag with one wiring harness with over 10 m used
for unfolding, and the connecting part should be twisted with insulation adhesive tape to insulate and
prevent from wrong unfolding for static.
Note:take down the joint of helix cable from panel wiring harness, the joint of helix cable
will be short circuit automatically, this will prevent from exploding the safety airbag
assembly at the side of driver for static to make heavy accident.
Supplemental restraint system--Scrap treatment for safety airbag
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(4) Connect conversion wiring harness of safety airbag on yel-
low joint of helix cable, then lead it out of automobile with
unfolding wiring harness (see following figure).
(5) Close all windows and doors, and assemble automobile
cover.
(6) Cut off the joint of wiring harness used for unfolding of safety
airbag assembly at the side of driver at the place apart from
the automobile, then connect it with two ends of battery
taken from automobile to make it explode (see following
figure).
Cover of automobile body
Wiring harness for explosion

Circuitry--Power supply
1. ST startup system
2. HEAD MAIN light system
3. spare
4. ECU instrument travel
computer (Aldine)
5. horn
6. turn light, alarm light
7. charging system
8. air condition system
9. electric injection system
10. audio system, air condition,
instrument, room light, trunk
light, door light
11. AM2 startup system
12. spare safety
13. spare safety
14. spare safety
15. spare safety
16. electric chair (Aldine)
17. electric fan
18. ABS system
19. ABS system20. left distance headlight
21. right distantce headlight
22. left low beams
23. right low beams
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Panel/combination instrument--combination instrument
Panel / combination instrument
combination instrument
Trouble table
Lightening:
Phenomenon
All lights fail
Only one light failsPossible parts of trouble
1. combination instrument assembly
2. joint or harness
1. combination instrument assemblyReference pages
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Indicator light:
Phenomenon
Trouble light fails
Charge light fails
Brake system light fails
ABS light fails
SRS lights fails
Door light fails
low fuel level light fails
low Oil pressure light failsPossible parts of trouble
1. harness or joint
2. engine ECU
3. combination instrument assembly
1. harness or joint
2. engine ECU
3. combination instrument assembly
1. harness or joint
2. ABS ECU
3. combination instrument assembly
1. harness or joint
2. ABS ECU
3. combination instrument assembly
1. harness or joint
2. airbag sensor assembly
3. combination instrument assembly
1. harness or joint
2. door control switch
3. combination instrument assembly
1. harness or joint
2. fuel level light switch
3. combination instrument assembly
1. combination instrument assembly
2. oil pressure light switch
3. harness or jointReference pages
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