Great Wall Florid. Manual - part 55

GWFLORID Maintenance Manual

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detection but also during the diagnostic detection cycle. However, if a short circuit on the power supply causes 

a malfunction, and the low-end transistor is opened while malfunctioned, the low-end transistor can only be 

detected when starting up detection, as to avoid faulty execution.

(b)  Ignition voltage is provided by a pressure increase converter.                        

(c)  Acceleration sensor performs self-detection when starting up detection.

(d)  Allowed offset range of the acceleration sensor during a diagnostic cycle.

(e)  Microcontroller includes AD converter, ROM, RAM, etc. 

(f)  Security sensor status.

Caution: There is a short-circuiting bar inside the squib circuit connector. When the connector is not 

connected, the short circuit happens between the squib circuit's terminal (+) and terminal (-), as to 

avoid faulty deployment caused by static electricity. When the connector is bad and the short-circuiting 

bar is connected, the fault symptom may not be eliminated.

4.  Clear the trouble code

When the X-431 diagnostic instrument receives the "Clear the trouble code" order sent through the serial inter-

face, the trouble code inside the ECU will be cleared. However, if an internal trouble code is recorded or has a 

collision record, it will not carry out this order.

(a)   Malfunction status display.

When the working voltage is supplied to the SRS-ECU through a battery, the SRS-ECU will light the warning 

lamp to inspect the light bulbs. During the initialization stage, the warning lamp will remain on for 6-7 s, and 

in order to inform the driver that the system has a malfunction, the warning lamp will continue to remain on 

after the working voltage is supplied. If the history trouble code’s quantity is less than 16, the warning lamp 

will remain lit for 6-7 s after turning the ignition on and then turn off automatically. If the history trouble code’s 

quantity is 16 and the current malfunction appears, it will be recorded and the first history malfunction record 

will be automatically removed.

(b)  Malfunction indicator.

When the system has malfunctioned, the warning lamp will be always on.

A displayed or history malfunction can only be reset by service personnel. A SRS-ECU internal malfunction or 

malfunction’s "collision record" cannot be reset. In this situation, the SRS-ECU must be replaced.

(c)  Microcontroller - independent warning lamp is lit.

The controller has a self-diagnosis function. If the inner controller malfunctions, the warning lamp will always 

be on.

(d)  If the airbag warning lamp is always on, please inspect it according to the following steps.

The first step of inspecting any of the malfunctions is to detect the malfunction’s position with a scanner. Then 

carry out the inspection using the corresponding part’s inspection method. If the scanning result is an internal 

malfunction or having to do with airbag execution, the SRS-ECU can be directly replaced.

219

Airbags

NO.

Troubleshooting list

Explanation

1

Airbag system warning lamp not lit

Airbag system warns of circuit malfunction

2

Airbag system warning lamp is always on

Airbag system warns of circuit 

malfunction or external malfunction

2.  Airbag system warning lamp does not lit

Inspection 

status

Airbag system warning lamp does not lit.

Possible 

causes

• Voltage disappears (fuse open circuit)

• Combination meter malfunction

• Wire harness malfunction between the instrument cluster and ECU unit

Diagnostic procedures

While performing the first malfunction detection, it is suggested to wiggle the wire harness and plugs to check for 

intermittent or poor contact. If there is, please check whether the plugs, terminals, and the wire harness are connected 

properly and undamaged. If the above mentioned problems do not exist, please take the following steps.

Steps

Inspection

Operation

1

Detect other wire harness and instrument cluster indicator 

lamps

• Set the ignition switch to the ON position

• Are other warning and indicator lamps on?

Yes

Set the ignition switch to the LOCK 

position, and then proceed to the 

next step

No

Detect the instrument cluster's 

power supply system and the 

grounded system (fuse)

2

Inspect the light bulbs

Warning:  

Incorrect airbag system component operation will cause the 

airbag and preload seat belt to opened accidentally, which 

may cause serious injuries. Please read the airbag system 

services warning before working on the airbag components

• Set the ignition switch to the LOCK position

• Disconnect the battery's negative cable and maintain for at 

least 60 s

• Remove the combination meter

• Check whether the two corresponding pins of the airbag 

warning lamp are conducting

Yes

Go to the next step

No

Replace the combination meter

 3

Detect the wire harness connection between the ECU unit and 

the instrument cluster

• Set the ignition switch to the LOCK position

• Disconnect the battery's negative cable

• Disconnect the instrument cluster plugs

• Check whether the warning lamp's corresponding circuits 

are conducting

Yes Go to the next step

No

Replace the wire harness

Malfunction diagnosis and troubleshooting

1.  Warning lamp is not on or always on

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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

221

Airbags

Steps

Inspection        

Operation

6

Check and make sure the malfunction symptom does not 

appear again after they are repaired

• Set the ignition switch to the LOCK position

• Disconnect the battery's negative cable and maintain for at 

least 1 min

• Connect all of the ECU plugs

• Connect the airbag subassembly plugs at the driver side

• Connect the airbag subassembly plugs at the passenger side 

• Connect the driver and passenger side preload seat belt plugs

• Connect the clock spring plugs

• Connect the battery's negative cable

• Set the ignition switch to the ON position

• Does the airbag warning lamp work properly?

Yes

After the malfunction 

is removed, explain the 

maintenance procedure 

to the client

No

Recheck the malfunction 

symptom, if the malfunction 

happens again, repeat 

the repairing procedures 

starting from the first step

4.  Internal malfunction

Type 

code 0D

Trouble 

code >80  

SRS airbag system unit internal malfunction

Detecting 
conditions

Warning
• This malfunction's diagnosis requires a trouble code not to be shown prior to inspection. Use a DTC 

to perform inspection. Performing this malfunction detection might cause operator injury or system 
damage due to incorrect operation. Therefore, before inspection, please properly prepare.

• SRS airbag system electronic control unit circuit internal malfunction

Possible 

causes

SRS airbag system unit internal malfunction

Operation

Replace the SRS airbag system unit. Refer to airbag system and SRS airbag system unit removal and installation

5.  Power supply

Trouble 

code 12

and 42

The SRS airbag system electronic control unit's power supply voltage is out of the standard range

Detecting 

conditions 

Warning

• This malfunction's diagnosis requires that a trouble code not be shown prior to inspection. Use a 

DTC to perform inspection. Performing this malfunction detection might cause operator injury or 

system damage due to incorrect operation. Therefore, before inspection, please properly prepare.

• Voltage of the SRS airbag system unit's 5 and 6 connector pins is lower than 9 V

Possible 

causes

• Battery voltage too low

  The wire harness between the battery and SRS airbag system electronic control unit has a 

malfunction

Diagnostic procedures

Steps

Inspection

Operation

1

Inspect the battery

Measure the battery voltage

Is the voltage higher than 9 V?

Yes Go to the next step

No Battery's voltage too low. Inspect 

the charging/discharging system

2

Inspect the wire harness between the battery and the fuse box

Take out the fuse box making sure not to loosen the connector, 

and set the ignition switch to the ON position

Is the fuse box's two corresponding terminal stub voltage higher 

than 9 V?

Yes Go to the next step

No Inspect and repair 

the wire harness