Nissan Teana J32. Instruction — part 1070

SRC-34

< COMPONENT DIAGNOSIS >

B1050 DRIVER AIRBAG MODULE

B1050 DRIVER AIRBAG MODULE

Description

INFOID:0000000003813960

For driver air bag module, crash is judged by main “G” sensor output signal and safing algorithm in front direc-
tion.

OPERATION

In case of frontal collision whose acceleration exceeds the specified level, the ignition materials are ignited by
electric ignition system. The system burns the gas generating materials resulting in a chemical reaction. This
generates hot gases that flow into the air bag through a filter and expand the bag.

STRUCTURE

Driver air bag module mainly consists of air bag and inflator which inflates air bag.

INSTALLATION

Driver air bag module is installed on the center of steering wheel with fixed bolts.

DTC Logic

INFOID:0000000003813961

DTC CONFIRMATION PROCEDURE

1.

CHECK SELF-DIAG RESULT

With CONSULT-III

1.

Turn ignition switch ON.

2.

Perform “AIR BAG” Self Diagnostic Result.

Without CONSULT-III

1.

Turn ignition switch ON.

2.

Check the air bag warning lamp status. Refer to

SRC-10, "Air Bag Warning Lamp Diagnosis"

.

NOTE:
SRS does not enter Diagnosis mode if no malfunction is detected in User mode.

Is malfunctioning part detected?

YES

>> Refer to

SRC-34, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000003813962

WARNING:

• Before servicing, turn ignition switch OFF, disconnect battery negative terminal and wait at least 3

minutes. (To discharge backup capacitor.)

• Never use unspecified tester or other measuring device.

1.

CHECK HARNESS CONNECTOR

Check the harness connector.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace harness connector.

2.

CHECK WIRING HARNESS

Check the wiring harness externals.

Is the inspection result normal?

YES

>> GO TO 3.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B1050

DRIVER AIRBAG MOD-
ULE
[VB-SHORT]

Driver air bag module circuit is shorted
to some power supply circuit
(including the spiral cable)

• Disconnection of wiring harness and

short

• Malfunction in driver air bag module
• Malfunction in spiral cable
• Malfunction in air bag diagnosis sen-

sor unit

B1050 DRIVER AIRBAG MODULE

SRC-35

< COMPONENT DIAGNOSIS >

C

D

E

F

G

I

J

K

L

M

A

B

SRC

N

O

P

NO

>> Replace wiring harness.

3.

CHECK SPIRAL CABLE CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect driver air bag module harness connector and Combination switch (Spiral cable) harness con-
nector.

3.

Check continuity between driver side air bag module harness connector and body side harness connec-
tor.

4.

Check continuity between driver air bag module harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace spiral cable. Refer to

SR-9, "Exploded View"

.

4.

REPLACE AIR BAG DIAGNOSIS SENSOR UNIT

1.

Replace air bag diagnosis sensor unit. Refer to

SR-22, "Exploded View"

.

2.

Perform DTC confirmation procedure. Refer to

SRC-34, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 1.

NO

>> INSPECTION END

Driver air bag module

Combination switch (Spiral cable)

Continuity

Connector

Terminal

Connector

Terminal

M350

10

M32

28

Existed

11

30

Driver air bag module

Ground

Continuity

Connector

Terminal

M350

10

Not existed

11

SRC-36

< COMPONENT DIAGNOSIS >

B1051 DRIVER AIRBAG MODULE

B1051 DRIVER AIRBAG MODULE

Description

INFOID:0000000003813963

For driver air bag module, crash is judged by main “G” sensor output signal and safing algorithm in front direc-
tion.

OPERATION

In case of frontal collision whose acceleration exceeds the specified level, the ignition materials are ignited by
electric ignition system. The system burns the gas generating materials resulting in a chemical reaction. This
generates hot gases that flow into the air bag through a filter and expand the bag.

STRUCTURE

Driver air bag module mainly consists of air bag and inflator which inflates air bag.

INSTALLATION

Driver air bag module is installed on the center of steering wheel with fixed bolts.

DTC Logic

INFOID:0000000003813964

DTC CONFIRMATION PROCEDURE

1.

CHECK SELF-DIAG RESULT

With CONSULT-III

1.

Turn ignition switch ON.

2.

Perform “AIR BAG” Self Diagnostic Result.

Without CONSULT-III

1.

Turn ignition switch ON.

2.

Check the air bag warning lamp status. Refer to

SRC-10, "Air Bag Warning Lamp Diagnosis"

.

NOTE:
SRS does not enter Diagnosis mode if no malfunction is detected in User mode.

Is malfunctioning part detected?

YES

>> Refer to

SRC-36, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000003813965

WARNING:

• Before servicing, turn ignition switch OFF, disconnect battery negative terminal and wait at least 3

minutes. (To discharge backup capacitor.)

• Never use unspecified tester or other measuring device.

1.

CHECK HARNESS CONNECTOR

Check the harness connector.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace harness connector.

2.

CHECK WIRING HARNESS

Check the wiring harness externals.

Is the inspection result normal?

YES

>> GO TO 3.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B1051

DRIVER AIRBAG MOD-
ULE
[GND-SHORT]

Driver air bag module circuit is shorted
to ground
(including the spiral cable)

• Disconnection of wiring harness and

short

• Malfunction in driver air bag module
• Malfunction in spiral cable
• Malfunction in air bag diagnosis sen-

sor unit

B1051 DRIVER AIRBAG MODULE

SRC-37

< COMPONENT DIAGNOSIS >

C

D

E

F

G

I

J

K

L

M

A

B

SRC

N

O

P

NO

>> Replace wiring harness.

3.

CHECK SPIRAL CABLE CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect driver air bag module harness connector and Combination switch (Spiral cable) harness con-
nector.

3.

Check continuity between driver side air bag module harness connector and body side harness connec-
tor.

4.

Check continuity between driver air bag module harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace spiral cable. Refer to

SR-9, "Exploded View"

.

4.

REPLACE DRIVER AIR BAG MODULE

1.

Replace driver air bag module. Refer to

SR-6, "Exploded View"

.

2.

Perform DTC confirmation procedure. Refer to

SRC-36, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 5.

NO

>> INSPECTION END

5.

REPLACE AIR BAG DIAGNOSIS SENSOR UNIT

1.

Replace air bag diagnosis sensor unit. Refer to

SR-22, "Exploded View"

.

2.

Perform DTC confirmation procedure. Refer to

SRC-36, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 1.

NO

>> INSPECTION END

Driver air bag module

Combination switch (Spiral cable)

Continuity

Connector

Terminal

Connector

Terminal

M350

10

M32

28

Existed

11

30

Driver air bag module

Ground

Continuity

Connector

Terminal

M350

10

Not existed

11