Infiniti FX35, FX50 (S51). Manual - part 1726

B1080, B1096 DRIVER AIRBAG MODULE

SRC-69

< DTC/CIRCUIT DIAGNOSIS >

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B1080, B1096 DRIVER AIRBAG MODULE 

Description

INFOID:0000000005241130

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 that inflates air bag.

INSTALLATION

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

DTC Logic

INFOID:0000000005241131

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-16, "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-69, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005241132

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

B1080
B1096

DRIVER AIRBAG MOD-
ULE 
[SHORT]

Driver air bag module circuit are shorted 
to each other
(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

SRC-70

< DTC/CIRCUIT DIAGNOSIS >

B1080, B1096 DRIVER AIRBAG MODULE

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-14, "Exploded View"

.

4.

REPLACE DRIVER AIR BAG MODULE

1.

Replace driver air bag module. Refer to 

SR-11, "Exploded View"

.

2.

Perform DTC confirmation procedure. Refer to 

SRC-69, "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-25, "Exploded View"

.

2.

Perform DTC confirmation procedure. Refer to 

SRC-69, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 1.

NO

>> INSPECTION END

Driver side air bag module 

harness connector

Terminal

Body side harness 

connector

Terminal

Continuity 

M302

10

M35

28

Existed

11

30

M301

12

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9

30

Driver side air bag module harness con-

nector

Terminal

Ground

Continuity 

M302

10

Not existed

11

M301

12

9

B1081 PRE-TEN FRONT RH

SRC-71

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B1081 PRE-TEN FRONT RH

Description

INFOID:0000000005241133

For front RH seat belt pre-tensioner, crash is judged by main “G” sensor output signal and safing algorithm in
front direction.

OPERATION

In the case of a frontal collision that exceeds specified impact level, the air bag diagnosis sensor unit detects
the deceleration caused by collision. It restrains the passenger with seat belt easing the stress on passengers
chest with load limiter.

STRUCTURE

The restraint system for front seat occupant consists of the pre-tensioner mechanism and load limiter mecha-
nism.

INSTALLATION

Front RH seat belt pre-tensioner is installed on the underside of center pillar with fixed nuts.

DTC Logic

INFOID:0000000005241134

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-16, "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-71, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005241135

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?

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B1081

PRE-TEN FRONT RH 
[OPEN]

Front RH seat belt pre-tensioner circuit 
is open

• Disconnection of wiring harness and 

open

• Malfunction in front RH seat belt pre-

tensioner

• Malfunction in air bag diagnosis sen-

sor unit

SRC-72

< DTC/CIRCUIT DIAGNOSIS >

B1081 PRE-TEN FRONT RH

YES

>> GO TO 3.

NO

>> Replace wiring harness.

3.

REPLACE FRONT SEAT BELT PRE-TENSIONER

1.

Replace front RH seat belt pre-tensioner. Refer to 

SB-6, "SEAT BELT RETRACTOR : Exploded View"

.

2.

Perform DTC confirmation procedure. Refer to 

SRC-71, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 4.

NO

>> INSPECTION END

4.

REPLACE AIR BAG DIAGNOSIS SENSOR UNIT 

1.

Replace air bag diagnosis sensor unit. Refer to 

SR-25, "Exploded View"

.

2.

Perform DTC confirmation procedure. Refer to 

SRC-71, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 1.

NO

>> INSPECTION END