Infiniti EX35. Manual - part 1362

SRC-74

< COMPONENT DIAGNOSIS >

B1089 PRE-TEN FRONT LH

B1089 PRE-TEN FRONT LH

Description

INFOID:0000000003591823

DTC B1089 [SHORT] PRE-TEN FRONT LH

For front LH 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 LH seat belt pre-tensioner is installed on the underside of center pillar with fixed nuts.

DTC Logic

INFOID:0000000003591824

DTC DETECTION LOGIC

With CONSULT-III

DTC No. Index (“SELF-DIAG [CURRENT]”), (“SELF-DIAG [PAST]” or “TROUBLE DIAG RECORD”)

DTC CONFIRMATION PROCEDURE (WITH CONSULT-III)

1.

CHECK SELF-DIAG RESULT

1.

Turn ignition switch ON.

2.

Check the screen of CONSULT-III.

Is malfunctioning part detected?

YES

>> Refer to 

SRC-74, "Diagnosis Procedure"

.

NO

>> INSPECTION END

DTC CONFIRMATION PROCEDURE (WITHOUT CONSULT-III)

NOTE:
• SRS will not enter diagnosis mode if no malfunction is detected in user mode.

1.

CHECK AIR BAG WARNING LAMP

1.

Turn ignition switch ON.

2.

Check the air bag warning lamp status.

Is malfunctioning part detected?

YES

>> Refer to warning lamp flash code chart. Refer to 

SRC-128, "DTC Index"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000003758586

WITH CONSULT-III

WARNING:

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

minutes. (To discharge backup capacitor.)

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B1089

PRE-TEN FRONT LH 
[SHORT]

Front LH seat belt pre-tensioner circuit 
are shorted to each other

• Disconnection of wiring harness and 

short

• Internal breakdown in front LH seat 

belt pre-tensioner

• Internal breakdown in air bag diag-

nosis sensor unit

B1089 PRE-TEN FRONT LH

SRC-75

< COMPONENT DIAGNOSIS >

C

D

E

F

G

I

J

K

L

M

A

B

SRC

N

O

P

• Do not use unspecified tester or other measuring device.

DIAGNOSTIC PROCEDURE

1.

CHECK HARNESS CONNECTOR

Check the connection of 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. 

NO

>> Replace wiring harness.

3.

CHECK FRONT SEAT BELT PRE-TENSIONER

1.

Replace front LH seat belt pre-tensioner. Refer to 

SB-5, "SEAT BELT RETRACTOR : Exploded View"

.

2.

Check “Self diagnosis result” with CONSULT-III.

3.

Perform DTC confirmation procedure. Refer to 

SRC-74, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 4. 

NO

>> INSPECTION END

4.

CHECK AIR BAG DIAGNOSIS SENSOR UNIT 

1.

Replace air bag diagnosis sensor unit. Refer to 

SR-16, "Exploded View"

.

2.

Check “Self diagnosis result” with CONSULT-III.

3.

Perform DTC confirmation procedure. Refer to 

SRC-74, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 1. 

NO

>> INSPECTION END

SRC-76

< COMPONENT DIAGNOSIS >

B1106, B1107, B1108, B1109, B1110, B1111 DIAGNOSIS SENSOR UNIT

B1106, B1107, B1108, B1109, B1110, B1111 DIAGNOSIS SENSOR UNIT

Description

INFOID:0000000003591871

DTC B1106, B1107, B1108, B1109, B1110, B1111 DIAGNOSIS SENSOR UNIT

Detects the whole SRS electrical system 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 electro-diagnosis tester CONSULT-III.

OPERATION

It detects a shock that exceeds specified level and monitors such systems as the driver and passenger air
bag, side air bag, curtain air bag, pre-tensioner seat belts and Occupant Classification System (OCS) operate
properly. 

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:0000000003591872

DTC DETECTION LOGIC

With CONSULT-III

DTC No. Index (“SELF-DIAG [CURRENT]”), (“SELF-DIAG [PAST]” or “TROUBLE DIAG RECORD”)

DTC CONFIRMATION PROCEDURE (WITH CONSULT-III)

1.

CHECK SELF-DIAG RESULT

1.

Turn ignition switch ON.

2.

Check the screen of CONSULT-III.

Is malfunctioning part detected?

YES

>> Refer to 

SRC-76, "Diagnosis Procedure"

.

NO

>> INSPECTION END

DTC CONFIRMATION PROCEDURE (WITHOUT CONSULT-III)

NOTE:
• SRS will not enter diagnosis mode if no malfunction is detected in user mode.

1.

CHECK AIR BAG WARNING LAMP

1.

Turn ignition switch ON.

2.

Check the air bag warning lamp status.

Is malfunctioning part detected?

YES

>> Refer to warning lamp flash code chart. Refer to 

SRC-128, "DTC Index"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000003591873

WITH CONSULT-III

WARNING:

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B1106
B1107
B1108
B1109

B1110

B1111

CONTROL UNIT 

Air bag diagnosis sensor unit is out of 
order or mis-match

• Internal breakdown in air bag diag-

nosis sensor unit

• Mis-match between specification on 

vehicle and configuration in air bag 
diagnosis sensor unit

B1106, B1107, B1108, B1109, B1110, B1111 DIAGNOSIS SENSOR UNIT

SRC-77

< COMPONENT DIAGNOSIS >

C

D

E

F

G

I

J

K

L

M

A

B

SRC

N

O

P

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

minutes. (To discharge backup capacitor.)

• Do not use unspecified tester or other measuring device. 

DIAGNOSTIC PROCEDURE

1.

CHECK HARNESS CONNECTOR

Check the connection of 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?

YES

>> GO TO 3.

NO

>> Replace wiring harness.

3.

CHECK AIR BAG DIAGNOSIS SENSOR UNIT

1.

Replace air bag diagnosis sensor unit. Refer to 

SR-16, "Exploded View"

.

2.

Check “Self diagnosis result” with CONSULT-III.

3.

Perform DTC confirmation procedure. Refer to 

SRC-76, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 1. 

NO

>> INSPECTION END