Great Wall Florid, Service Manual

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GWFLORID Maintenance Manual 220
3. Airbag system warning lamp is always on
2 Airbag system warning lamp is always on
Inspection
status
Airbag system warning lamp is always on
Possible
causes
• Battery power supply is insufficient
• ECU internal malfunction
• Combination meter airbag warning lamp malfunction
• ECU plug is improperly connected
• Combination meter plug poorly contacted
• ECU power supply fuse circuit broken or poorly contacted
• Poor ECU plug terminal connection
• Poor wire harness contact between the ECU plug terminal and the ground
• Driver side or front passenger side airbag circuit malfunction
• Driver side and front passenger side preload seat belt malfunction
Diagnostic procedures
When starting inspection, please first use the specially designed diagnostic instrument (X - 431 diagnostic scanner)
and the ECU to diagnose the communication and determine the causes of malfunction. If communication fails,
please perform the following inspections
Steps Inspection Operation
1
Examine the battery
• Check the battery voltage
• Is the voltage higher than 9 V?
Examine the charging/discharging system, and then go to step
5
Yes Go to the next step
No
Battery power supply
is insufficient
2
Examine the conducting state of the wire harness between the
ECU unit and combination meter
• Set the ignition switch to the LOCK position
• Disconnect the battery's negative terminal
• Open the dashboard base
• Disconnect the instrument cluster connectors
• Connect the battery's negative
• Set the ignition switch to the ON position
• Check whether the corresponding connector terminal's
voltage is 12 V (power supply and meter connection)
Yes Go to the next step
No
Check the circuit, and then
go to step 5 after it is fixed
3
• Set the ignition switch to the LOCK position
• Check if the meter connector's corresponding terminal and
diagnostic interface's corresponding terminal are conducting
(diagnose the K wire's two ends)
Yes Go to the next step
No
Repair or replace the wire
harness.Then go to step 5
4
Be sure to disconnect the battery's negative cable and
maintain for at least 1 min
• Disconnect the ECU connector
• Disconnect the instrument cluster plugs
• Are the ECU connector terminal 25, 10, 46, and instrument
cluster's connectors conducting?
Yes Go to the next step
No
Replace the wire harness,
and then go to step 5
5
Remove the ECU to check whether the terminal is in good
condition. Is the short-circuiting bar broken?
Yes Replace the ECU
No
Reconnect the ECU connector,
and then go to the next step