Diagnostic Steps:

Step 1

Use scan tool to access airbag control module.

(a)

Check DTC.

Yes

Refer to 

9.2.6.6

 

Relevant DTC Code

Diagnostic

No

Step 2

Check the battery.

(a)

Turn the ignition to "ON" position.

(b)

Measure battery voltage with a multimeter.
Standard Voltage: 11-14 V

(c)

Turn the ignition switch to "OFF" position.

(d)

Confirm whether the voltage is Standard Value:.

No

Check and replace the battery or the charging
system. Go to step 8

Yes

Step 3

Check airbag control module and its wiring harness connector.

(a)

Turn the ignition switch to "OFF" position.

(b)

Disconnect the battery negative cable and wait for at least
90s. Refer to 

2.11.8.1

 

Battery Disconnection

.

(c)

Check whether the connector is properly connected to the
airbag control module.

No

Correctly connect the connector. Go to step 8

Yes

Step 4

Check wiring harness (airbag control module power supply, ground).

1
7 8

9 10

16

15

14

13

12

11

2 3 4 5 6

Airbag Control Module 1 Harness Connector IP35

FE09-5104b

(a)

Disconnect airbag control module connector IP35.

(b)

Connect the battery negative cable and wait for at least 2s.
Refer to 

2.11.8.1

 

Battery Disconnection

.

(c)

Turn the ignition switch to "ON" position.

(d)

Measure voltage between connectors IP35 terminal No.11
and vehicle body ground with a multimeter.
Standard Voltage: 11-14 V

(e)

Turn the ignition switch to "OFF" position.

(f)

Measure voltage between connectors IP35 terminal No.16
and vehicle body ground with a multimeter.
Standard Resistance: Less than 1 Ω

Data normal?

No

Repair or replace the wiring harness. Go to
step 8

Safety Protection Device

Airbag System

9-15

Yes

Step 5

Check the wiring harness (instrument cluster power, ground).

15 14 13 12 

10 9 8 7  6 5 4 3 2 1 

16 

32 31 30 29 28 27 26 25 24 23 22 21 20 19 18  17 

Instrument Cluster Harness Connector IP03

FE09-5105b

(a)

Disconnect the battery negative cable and wait for at least
90s. Refer to 

2.11.8.1

 

Battery Disconnection

.

(b)

Disconnect the instrument cluster connector IP03.

(c)

Connect the battery negative cable and wait for at least 2s.
Refer to 

2.11.8.1

 

Battery Disconnection

.

(d)

Turn the ignition switch to "ON" position.

(e)

Measure voltage between IP03 terminals No.24,32 and the
body ground respectively with a multimeter.
Standard Voltage: 11-14 V

(f)

Turn the ignition switch to "OFF" position.

(g)

Measure resistance between IP03 terminals No.15,16 and
the body ground respectively with a multimeter.
Standard Resistance: Less than 1 Ω

Data Normal?

No

Repair or replace the wiring harness. Go to
step 8

Yes

Step 6

Replace the instrument cluster.

(a)

Replace the instrument cluster. Refer to 

11.7.7.1

 

Instrument

Cluster Replacement

.

(b)

Connect the battery negative cable and wait for at least 2s.
Refer to 

2.11.8.1

 

Battery Disconnection

.

(c)

Turn the ignition switch to "ON" position.

(d)

Check the airbag warning lamp status.

Is the airbag warning lamp still on after the ignition is off?

No

System normal

Yes

Step 7

Replace the airbag control module.

(a)

Replace the airbag control module. Refer to 

9.2.7.1

 

Airbag

Control Module Replacement

.

Next

Step 8

Confirm the repair has been completed.

(a)

Turn the ignition switch to "ON" position and observe the
warning lamp status to confirm the system is normal.

(b)

Use scan tool to check whether there is a historical fault and
clear the historical DTC code.

9-16

Airbag System

Safety Protection Device

9.2.6.5 SRS warning lamp always off

Schematic:

Refer to 

9.2.6.4

 

Warning lamp Always On

in the schematic.

Diagnostic Steps:

Step 1

Check the battery.

(a)

Measure the battery voltage.
Standard Voltage: 11-14 V

Is the voltage specified value?

No

Check and replace the battery or the charging
system. Go to step 5

Yes

Step 2

Check the instrument cluster connector.

(a)

Turn the ignition switch to "OFF" position.

(b)

Disconnect the battery negative cable and wait for at least
90s. Refer to 

2.11.8.1

 

Battery Disconnection

.

Are the connectors properly connected to the instrument cluster?

No

Properly connect the connector. Go to step 5

Yes

Step 3

Check the wiring harness (instrument cluster power and ground).

15 14 13 12 

10 9 8 7  6 5 4 3 2 1 

16 

32 31 30 29 28 27 26 25 24 23 22 21 20 19 18  17 

Instrument Cluster Harness Connector IP03

FE09-5105b

(a)

Turn the ignition switch to "OFF" position.

(b)

Disconnect the instrument cluster connector IP03.

(c)

Turn the ignition switch to "ON" position.

(d)

Measure voltage between connector IP03 terminals No.
24,32 and the body ground respectively with a multimeter.
Standard Voltage: 11-14 V

(e)

Turn the ignition switch to "OFF" position.

(f)

Measure resistance between connector IP03 terminals No.
15,16 and the body ground respectively with a multimeter.
Standard Resistance: Less than 1 Ω

Are the voltage and resistance specified values?

No

Check the fuses, repair or replace the wiring
harness. Go to step 5

Yes

Step 4

Replace the instrument cluster.

(a)

Replace the instrument cluster. Refer to 

11.7.7.1

 

Instrument

Cluster Replacement

.

Safety Protection Device

Airbag System

9-17

Next

Step 5

Confirm the repair has been completed.

(a)

Turn the ignition switch to "ON" position, observe the warning
lamp status to confirm that the system is normal.

(b)

Use scan tool to check whether there is a historical failure
and clear the historical DTC code.

9.2.6.6 Relevant DTC Code Diagnostic

Collision Sensor Malfunction

Note

This workshop manual only diagnoses the left front collision sensor, other sensors diagnostics are similar. Please refer
to "Left Front Collision Sensor Diagnostic".

Left Front Collision Sensor

DTC Code

Description

Diagnostic

B1071

Left Front Collision Sensor Voltage Error

1. Turn  the  ignition  switch  to  OFF,  disconnect  the  battery  negative

cable and wait for 90s and above, re-connect the battery negative
cable.

2. Check whether there is a fault. If the fault still exists, replace the

sensor. Refer to 

9.2.7.6

 

Front Collision Sensor Replacement

.

B1072

Left Front Collision Sensor Circuit Open

1. Check whether the circuit between the airbag control module and

the sensor wiring harness is open. Otherwise repair the fault part.

2. Check whether the wiring harness connector is connected properly.

Otherwise properly connect the harness connector.

B1073

Left 

Front 

Collision 

Sensor

Communication Error

Check whether the sensor signal pin and ground and the airbag control
module  definition  pin  is  connected  correctly.  If  the  connection  is  not
correct, replace the wiring harness.

B1074

Left 

Front 

Collision 

Sensor

Configuration Error, Sampling Error

Replace  the  sensors.  Refer  to 

9.2.7.6

 

Front  Collision  Sensor

Replacement

.

B1075

Left  Front  Collision  Sensor  Saturation
Error, Left Front Collision Sensor Error

1. Measure the ECU power supply voltage. If the voltage does not meet

the  requirements,  check  the  charging  system.  Refer
to

2.11.7

 

Diagnostic Information and Procedures

.

2. If the voltage is normal, replace the sensor. Refer to 

9.2.7.6

 

Front

Collision Sensor Replacement

.

Schematic:

Refer to 

9.2.6.4

 

Warning lamp Always On

in the schematic.

Diagnostic Steps:

Step 1

Check the wiring harness (airbag control module power supply, ground).

9-18

Airbag System

Safety Protection Device