Nissan Teana J32. Manual - part 1069

SRC-30

< COMPONENT DIAGNOSIS >

B1042, B1043, B1044, B1045, B1046, B1047 DIAGNOSIS SENSOR UNIT

B1042, B1043, B1044, B1045, B1046, B1047 DIAGNOSIS SENSOR UNIT

Description

INFOID:0000000003813954

Check the whole SRS and displays the malfunction either by illuminating or blinking the air bag warning lamp
in the combination meter. Malfunctioning part can be detected by on board self-diagnosis system and CON-
SULT-III.

OPERATION

It detects a shock that exceeds a specified level and monitors whether the driver and passenger air bags, front
side air bag, side curtain air bag and pre-tensioner seat belts operate normally. 

STRUCTURE

It contains the “G” sensors for both frontal and side collisions and spare battery function in case of main bat-
tery damage in collision.

INSTALLATION

Air bag diagnosis sensor unit is installed under the center console with fixed bolts.

DTC Logic

INFOID:0000000003813955

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-30, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000003813956

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 connectors.

2.

CHECK WIRING HARNESS

Check the wiring harness externals.

Is the inspection result normal?

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B1042
B1043
B1044
B1045
B1046
B1047

CONTROL UNIT 

Air bag diagnosis sensor unit is mal-
functioning or out of the specification

• Malfunction in air bag diagnosis sen-

sor unit

• Configuration in air bag diagnosis 

sensor unit dose not match to the ve-
hicles specification

B1042, B1043, B1044, B1045, B1046, B1047 DIAGNOSIS SENSOR UNIT

SRC-31

< COMPONENT DIAGNOSIS >

C

D

E

F

G

I

J

K

L

M

A

B

SRC

N

O

P

YES

>> GO TO 3.

NO

>> Replace wiring harness.

3.

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-30, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 1.

NO

>> INSPECTION END

SRC-32

< COMPONENT DIAGNOSIS >

B1049 DRIVER AIRBAG MODULE

B1049 DRIVER AIRBAG MODULE

Description

INFOID:0000000003813957

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:0000000003813958

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-32, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000003813959

WARNING:

 With CONSULT-III

• 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?

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B1049

DRIVER AIRBAG MOD-
ULE
[OPEN]

Driver air bag module circuit is open
(including the spiral cable)

• Disconnection of wiring harness and 

open

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

sor unit

B1049 DRIVER AIRBAG MODULE

SRC-33

< COMPONENT DIAGNOSIS >

C

D

E

F

G

I

J

K

L

M

A

B

SRC

N

O

P

YES

>> GO TO 3.

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-32, "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-32, "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