instrument cluster GREAT WALL HOVER 2006 Service Repair Manual

Safety airbag-10
1. Extinguishments of safety airbag system alarm lamp
Troubleshooting
Extinguishments or normal-light of alarm lamp
NO . Troubleshooting item Description
1 T he warning la mp of safety a irbag
system is not displayed. Safety airbag system warns circuit failure
2 T he warning la mp of safety a irbag
system is light normally. Safety airbag system warns circuit failure or external
failure.

1 Extinguishments of safety airbag system alarm lamp
Test status Safety airbag system warns circuit failure.
Possible causes No voltage (fuse shutoff)
Combined instrument failure
Failure of wiring harness between instrument cluster and ECU unit

Diagnostic procedure
When first carry out failure test, joggle the wiring harness and plug to test whether there is periodical bad contact in the circuit, if
it so, please confirm whether the plug, terminal and wiring harness well connected and in good condition. If it is not any of previous
cases, operate according to the following steps.
Procedure Te s t Operation
Ye s Place the ignition switch in LOCK
position followed by next step
1 Test other wiring harness and instrument cluster
indicator lamp
·place the ignition switch in ON position
·light other alarm and indicator lamps No Test the instrument cluster power-supply
system and grounding s ystem (fuse), then
go to step 5.
Yes Next step
2 Bulb test
Warning:
Incorrect handling with the safety airbag system
units will cause the safety airbag’s improper
release and pretension of safety belt, which will
lead to serene accidents. Please read safety airbag
service warning before handling the safety airbag
units.
·Place the ignition switch in LOCK position。
·shut off accumulator negative line and keep the
status for at least 60 seconds.
·Remove the combined instrument.
Test the connection between the two
corresponding stitches of safety airbag alarm lamp No





Rep la ce th e b ulb of a larm la mp.

Safety airbag-11
2. Normal-light of safety airbag system indicator lamp
2 Normal-light of safety airbag system alarm lamp
Test status Normal-light of safety airbag system alarm lamp
Possible causes Insufficient battery voltage
ECU internal failure
Combined instrument safety airbag alarm lamp failure
ECU plug misconnects
Combined instrument plug bad-contact
ECU power-supply fuse shutoff or bad contact
Misconnection of ECU plug terminal
Bad contact between ECU plug terminal and grounding wiring
harness.
Driver ’s or passengers’ side safety airbag circuit failure.

Procedure Te s t Operation
Yes Next procedure.
3 Test the wiring harness connection between ECU
unit and instrument cluster.
·Place the ignition switch in LOCK position。
·shut off accumulator negative line
·shut off the instrument cluster plug
·test the connection b etween alarm lamp circuit
and its relative circuits No Replace the wiring harness and get into
step 5

Safety airbag-12
Begin the test with diagnostic communication with special diagnostic device (X-431 diagnostic tester) and ECU
to find out the failure causes, do the next test providing communication is not successful.
Procedure Te s t Operation
Yes Next procedure
1 Test the battery
Test the battery voltage
Is the voltage higher 9V? No Insufficient battery supply.
Test the charging/discharging
system, then go to step 5.
Yes Next step
2 Test the wiring harness connection between ECU and
combined instrument.
Place the ignition switch in LO C K position。
Shut off the battery negative.
O pen the central channel guard plate.
Shut off the instrument combined connector clip
Connect the negative of battery
Place the ignition switch in ON position.
Check whether the instrument connector clip terminal
voltage is 12V(power supply and instrument line) No Check the circuit and continue the
operation according to step 5.
Yes Next step
3 Place the ignition switch in LO C K position。
Check the connection of corresponding terminals between
instrument connector clip and diagnostic interface
(diagnose the two ends of K-line) No Repair or replace the wiring
harness and continue according to
step 5
Yes Next step
3 Make sure the shutoff of accumulator negative line and
keep the status for at least 1 minute.
Shut off ECU connector clip
Shut off the instrument cluster plug.
Connect the ECU plug terminal 5,7,9 and instrument
cluster plug? No Replace the wiring harness and
step 5
Yes Replace ECU
4 Remove EC U to check the condition of term inal and
whether the shorting bar is broken.
No Reconnect EC U connector clip
and next step.
Yes Troubleshooting followed by the
explanations to customers upon
the repair ing pro ced ur e.
5
Make sure that the failure will never reoccur after
repairing.
Place the ignition switch in LO C K position。
Shut off accumulator negative line and keep the status for
at least 1 m in ute.
Connect all ECU plugs
Connect the driver’s side safety airbag combined
instrum ent p lug
Connect the passengers’ side safety airbag combined
instrum ent p lug
Connect the driver and passengers’ side pretension safety
belts plugs.
(Vehicles with pretension safety-b elts)
Connect clock spring plug
Connect the accumulator negative line
Place the ignition switch in ON position
Does the safety airbag alarm lamp work functionally? No Retest the failure symptoms;
repeat from step 1 if the failure
reoccurs.

Safety airbag-20
Wiring harness joint (instrument cluster wiring harness)
Check whether the wiring harness is well installed, the joint is broken and the terminal is deformed.
Warning
The attentions for use and maintenance for SRS safety airbag are displayed in the Figure. Operate according to the sign and, the
destructed and dirty sign must be replaced with a new one steering
wheel in Figure6-1
Driver’s side safety airbag module in Figure 6.2
Clock spring in Figure 6.3
SRS-ECU in Figure 6.4
Sun visor in Figure 6.5
Passengers’ side safety airbag module in Figure 6.6
Passenger side airbag (PAB)