ECU GREAT WALL HOVER 2006 Service Owner's Guide

Safety airbag-21
Removal methods for all the parts
Safety airbag electronic-control unit
Caution
Continue the operation 60 seconds after the removal of accumulator negative. Wrap the removed negative with
insulating tape for insulation.
2. The SRS-ECU must not be separated nor repaired replace the failed SRS-ECU with a new one.
3. Prevent the SRS-ECU from shock and vibration, replace the SRS-ECU with depression, crack or deformation with a
new one.
4. Do replace the SRS-ECU with a new one after the safety airbag is released.
5. Do not damage the SRS-ECU when removing or maintaining the parts next to it.
Figure 61 Figure 62
Figure 6
3 Figure 64
Figure 6
5 Figure 66 warning signswarning signs
passengers’ side safety airbag module
warning signs

Safety airbag-22
1. Operations before removal
a. Place the ignition switch in OFF position.
b. Remove the accumulator negative and well preserve it somewhere or wrap it with tape.
2. Removal procedure.
a. Central channel’s side panel (or remove the co-instrument panel)
b. Remove the connector clip connecting with the safety airbag ECU
3. Installation sequence
a. SRS-ECU;
b. Install the connector clip connecting with the safety airbag ECU
c. Central channel’s side panel (or remove the co instrument panel)
d. Connect the grounding jumper.
4. Some points for installation
a. SRS-ECU installation
b. Post-installation test
Place the ignition switch in ON position
SRS alarm lamp flashes in 6 seconds and extinguishes.
c. If not extinguishes, the failure test and troubleshooting must be done.
5. Test
a. Whether the depression, crack or deformation is with the SRS-ECU shield.
b. Whether the terminal is broken or deformed.
Caution: The SRS-ECU safety airbag will not work normally if the SRS-ECU is not correctly installed.
Caution: The SRS-ECU with depression, crack or deformation must be replaced with a new one.
For the inspection of SRS-ECU besides the previous refer to related item of troubleshooting

Safety airbag-30
wiring harness for release
shorting site
6m plus
2. Release outside the vehicle
Caution
Release the safety airbag somewhere open and plain as well as 6m plus from the obstacles and people
When release the safety airbag outdoors, try to avoid the strong wind and ignite windward in the breeze.
a. Remove the accumulator negative and positive and remove the accumulator.
Caution
Continue the operation 60 seconds after the removal of the accumulator.
b. Release the safety airbag module according to following procedure
driver’s side safety airbag module
remove the driver’s side safety airbag module off the vehicle.
Caution
The two ends of the terminal will short automatically without the joint connection of driver’s safety airbag module,
therefore the possible improper release caused by static interference can be avoided; if it improperly releases, keep the
released side up and store it somewhere plain, do not lay anything on it.
Prepare 2 6m plus release wiring harnesses and mutually connect the other ends(short-circuit) of them to avoid the possible
improper release caused by static interference.( refer to figure 9-4)
Touch the vehicle with your hands to eliminate the static electricity.
Caution
Strictly execute the previous procedure for it can prevent the possible incorrect release caused by the static interference
from happening.
Shut off the driver’s side safety airbag module wiring harness and connect it with two release wiring harnesses( refer to figure
9-5)
release wiring harness
passengers’ side safety airbag module
shoring site
insulating tape

Safety airbag-18
Nor mal Present failure code
Replace SRS safety airbag system
unit
Take references in
removal/installation of SRS
safety airbag system unit in safety
airbag system.
History-accumulated failure
codes
The end of failure diagnosis
4 Check the wiring harness between passengers’ side safety airbag
module and SRS safet y airbag system electronic-control unit
Place the ignition switch in LOCK position
Release accumulator negative wire and then wait for about 1
minute plus
Remove steering pillar shell
Release clock spring connector clip
Release driver’s and passengers’ side safety airbag module
connector clips
Release all SRS safety airbag system unit connector clips
Check whether the following troubles are with the circuit of the
connector clips terminals between SRS safety airbag system
electronic-control unit and passengers’ side safety airbag
module
Grounding
Power-supply shorting
Shutoff
Is the previous circuit normal? Abnormal Replace the relative wiring
harness
Impact-vehicle diagnosis
Test SRS-ECU diagnostic signals
1. Connect the (X-431 diagnostic test’s) diagnostic joint
2. Read the diagnostic results with X-431 diagnostic tester
Repairing procedure
1.When safety airbag is released.
The following parts should be replaced with new ones
a. Passengers’ side safety airbag module
b. SRS-ECU
c. Driver’s side safety airbag module
2 Check the following parts; replace them with new ones providing something wrong with them.
a. Clock spring
b. Steering-wheel, steering column, bottom steering shaft module
3.Driver’s side safety airbag module’s installation status towards the steering wheel.
a. Check whether abnormal knocking is with the steering wheel, its activity is in good condition and its clearance is normal.
b. Check whether the wiring harness joint is broken and its terminal is deformed.
Caution: Due to the impact, the diagnostic instrument cannot communicate with SRS-ECU when accumulator is lack of
power, in this case, check and maintain the instrument panel wiring harness or utilize the extension power supply.