Great Wall Florid. Manual — part 54
GWFLORID Maintenance Manual
214
Areas of Importance
1. While performing maintenance on the SRS airbag, make sure to work in accordance with this
chapter's steps and notes.
2. Be sure to use the specified test apparatus and SST (Special Service Tools) which are mentioned in this
chapter.
3. While performing maintenance on the following mentioned components, if there is any problem with a
component, be sure to replace it with a new one.
• Airbag ECU assembly.
• Clock spring assembly.
• Driver side airbag assembly.
• Front passenger side airbag module.
• Driver side preload seat belt.
• Front passenger side preload seat belt.
• Airbag wire harness.
4. While performing maintenance, please disconnect the battery's negative terminal connector, and then
after waiting for 60 s, commence operation. Furthermore, wrap up the removed negative terminal with
insulating tape.
After the battery power is cut off, the capacitor in the airbag ECU will still maintain a set amount of electrical
energy. If used without waiting a sufficient amount of time, it may lead to serious injury and accidents due to
the airbag's faulty deployment.
5. When painting the vehicle, excessive heat may influence the components, in which case the SRS-ECU,
airbag module, clock spring, etc., should first be removed and set aside.
Use a diagnostic scanner to clear the trouble code after the SRS airbag is repaired, as to ensure the warning
lamp will continue to work normaly.
Airbag Electronic Control Unit
Airbag warning lamp
Airbag ECU assembly 2
Front passenger side
airbag assembly
Driver side airbag assembly
Diagnostic interface position
Driver side electronic pretensioner
Front passenger side electronic pretensioner
The position of the airbag warning
lamp inside the combination meter
215
Airbags
Airbag electronic control interface and interface-pin definition
No.
Name
Description
1
DRV A/B +
Driver side airbag assembly, high end
2
DRV A/B -
Driver side airbag assembly, low end
3
PSG A/B +
Front passenger side airbag assembly, high end
4
PSG A/B -
Front passenger side airbag assembly, low end
7
PSG PRETENSIONER - Front passenger seat belt pretensioner, low end
8
DRV PRETENSIONER + Driver seat belt pretensioner, high end
9
DRV PRETENSIONER - Driver seat belt pretensioner, low end
10
WARNING LAMP
Warning lamp
11
GND
Ground cable
25
BPT Hi
ON power supply
30
PSG PRETENSIONER - Front passenger seat belt pretensioner, high end
46
K-LINE
Serial data I/O (K wire) diagnosis
Diagnostic Scanner
Instrument
Name
Application
X-431 diagnostic scanner
Check the system malfunction
of the SRS airbag system and
clear the ECU trouble code.
GWFLORID Maintenance Manual
216
SRS airbag warning lamp inspection
1. When the ignition switch is set to the ON position, check if the SRS warning lamp remains on for 6-7 s.
2. If the SRS warning lamp shuts off after 6-7 s, this is normal.
3. Except for the items listed above, diagnostic inspection is still needed.
System diagnosis
Airbag ECU will initiate a series of diagnostic test cycles to check if the airbag system functions are ready for
use. This diagnostic test can guard against the restraint system's faulty execution and at the same time guarantee
prompt execution in a collision. If a malfunction appears, airbag ECU will store the appropriate trouble code and
light up the warning lamp to point out the malfunction, as to make maintenance more convenient.
Diagnostic interface
Troubleshooting
Basic processes of the malfunction diagnostic
There are two SRS-ECU malfunctions types classified by time: current malfunction and history malfunction.
The malfunction types categorized by property are: external malfunction and internal malfunction.
Current malfunction trouble codes and history malfunction trouble codes may exist at the same time. External
malfunction trouble codes can be eliminated with a diagnostic instrument, but the internal malfunction trouble
codes cannot be cleared unless the SRS-ECU is changed.
Caution: After installing a new SRS airbag system electronic control unit, the airbag system warning
lamp will remain on for 6-7 s when the ignition switch is set to the ON position. This indicates that
the SRS airbag is operating properly. At this point, the system does not need to be inspected and
repaired. Aside from this case however, the system should be diagnosed and repaired.
Warning lamp
abnormal
Connect the scanner
and K wire to
scan the ECU
Detected fault
Troubleshooting
Clear the
trouble codes
217
Airbags
Malfunction judgment
1. Malfunction record (trouble code storage)
After the ECU performs the diagnostic test cycle in order to verify a malfunction, the SRS-ECU will store the
relevant code, the initial detection time, the final detection time, and the number of times it occurred in the
EEPROM.
The SRS-ECU can store 16 codes at most.
2. SRS-ECU approved trouble codes
No.
Malfunction introduction
Type code
Trouble
code
Possible
removal
1
(Front passenger side preload seat belt), connected to the
power supply
03H
01H
Removable
2
(Driver side front row preload seat belt), connected to the
power supply
03H
02H
Removable
3
(Driver side airbag assembly), connected to the power
supply
03H
03H
Removable
4
(Front passenger side airbag assembly), connected to the
power supply
03H
04H
Removable
5
(Front passenger side seat preload seat belt), grounded
02H
01H
Removable
6
(Driver side front row preload seat belt), grounded
02H
02H
Removable
7
(Driver side airbag assembly), grounded
02H
03H
Removable
8
(Front passenger side airbag assembly), grounded
02H
04H
Removable
9
(Front passenger side preload seat belt), resistance too
high or open circuit
01H
01H
Removable
10
(Driver side front row preload seat belt), resistance too
high or open circuit
01H
02H
Removable
11
(Driver side airbag assembly), resistance too high or open
circuit
01H
03H
Removable
12
(Front passenger side airbag assembly), resistance too
high or open circuit
01H
04H
Removable
13
(Front passenger side preload seat belt), resistance too
low or short circuit
0CH
01H
Removable
14
(Driver side preload seat belt), resistance too low or short
circuit
0CH
02H
Removable
15
(Driver side airbag assembly), resistance too low or short
circuit
0CH
03H
Removable
16
(Front passenger side airbag assembly), resistance too
low or short circuit
0CH
04H
Removable
17
Power supply voltage is out of range (high voltage or low
voltage)
12H
42H
Removable
18
Power cord contact dysfunctional
11H
42H
Removable
19
Warning lamp fault - connected to the power supply or
bulb is short circuited
03H
40H
Removable
20
Warning lamp fault - grounded or open circuit in filament
02H
41H
Removable
21
Configuration error
06H
44H
Removable
22
Internal malfunction
0DH
>80H
Irremovable
Replace
airbag ECU
Trouble code transmission is completed the SRS-ECU outputs through the maintenance program's
serial data interface to the specified diagnostic instrument (X-431 diagnostic scanner).
3. Internal malfunction
The microcontroller can detect the following items not only when starting up detection, but also during the
diagnostic detection cycle.
(a) The ignition circuit triggers the transistor: The high-end transistor will be detected not only when starting up
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