Infiniti G37 Coupe. Manual - part 1206

SRC-74

< COMPONENT DIAGNOSIS >

B1086 PRE-TEN FRONT LH

>> GO TO 2.

2.

CHECK AIR BAG WARNING LAMP

Check the warning lamp status.

Is malfunctioning part detected?

YES

>> Refer to 

SRC-133, "DTC Index"

.

NO

>> INSPECTION END.

Diagnosis Procedure (Component diagnosis)

INFOID:0000000001694562

With CONSULT-lll

WARNING:

• Before servicing, turn ignition switch OFF, disconnect both battery terminals and wait at least 3 min-

utes. (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

>> Repair or 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.

2.

Check the screen of CONSULT-lll.

Is the inspection result normal?

YES

>> INSPECTION END.

NO

>> Check the intermittent incident. Refer to 

GI-38, "Intermittent Incident"

.

B1087 PRE-TEN FRONT LH

SRC-75

< COMPONENT DIAGNOSIS >

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B1087 PRE-TEN FRONT LH

Description

INFOID:0000000001694563

DTC B1087 [VB-SHORT] PRE-TEN FRONT LH

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

OPERATION

In the case of a frontal collision that exceeds specified impact level, the diagnosis sensor unit detects the
deceleration caused by collision. If 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:0000000001694564

DTC DETECTION LOGIC

With CONSULT-lll

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

DTC CONFIRMATION PROCEDURE (With CONSULT-lll)

1.

INSPECTION START

Turn ignition switch ON.

>> GO TO 2.

2.

CHECK SELF-DIAG RESULT

Check the screen of CONSULT-lll.

Is malfunctioning part detected?

YES

>> Refer to 

SRC-76, "Diagnosis Procedure (Component diagnosis)"

.

NO

>> INSPECTION END.

DTC CONFIRMATION PROCEDURE (Without CONSULT-lll)

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

1.

INSPECTION START

Turn ignition switch ON.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B1087

PRE-TEN FRONT LH
[VB-SHORT]

Front LH seat belt pre-tensioner circuit 
is shorted to some power supply circuit.

• Disconnection of wiring harness and 

short.

• Internal breakdown in front LH seat 

belt pre-tensioner.

• Internal breakdown in diagnosis sen-

sor unit (ACU).

SRC-76

< COMPONENT DIAGNOSIS >

B1087 PRE-TEN FRONT LH

>> GO TO 2.

2.

CHECK AIR BAG WARNING LAMP

Check the warning lamp status.

Is malfunctioning part detected?

YES

>> Refer to 

SRC-133, "DTC Index"

.

NO

>> INSPECTION END.

Diagnosis Procedure (Component diagnosis)

INFOID:0000000001694565

With CONSULT-lll

WARNING:

• Before servicing, turn ignition switch OFF, disconnect both battery terminals and wait at least 3 min-

utes. (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

>> Repair or replace harness connector.

2.

CHECK WIRING HARNESS

Check the wiring harness externals.
Is the inspection result normal?

YES

>> GO TO 3. 

NO

>> Repair or replace wiring harness.

3.

CHECK FRONT SEAT BELT PRE-TENSIONER

1.

Replace front LH seat belt pre-tensioner.

2.

Check the screen of CONSULT-lll.

Is the inspection result normal?

YES

>> INSPECTION END.

NO

>> Check the intermittent incident. Refer to 

GI-38, "Intermittent Incident"

.

B1088 PRE-TEN FRONT LH

SRC-77

< COMPONENT DIAGNOSIS >

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G

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SRC

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B1088 PRE-TEN FRONT LH

Description

INFOID:0000000001694566

DTC B1088 [GND-SHORT] PRE-TEN FRONT LH

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

OPERATION

In the case of a frontal collision that exceeds specified impact level, the diagnosis sensor unit detects the
deceleration caused by collision. If 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:0000000001694567

DTC DETECTION LOGIC

With CONSULT-lll

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

DTC CONFIRMATION PROCEDURE (With CONSULT-lll)

1.

INSPECTION START

Turn ignition switch ON.

>> GO TO 2.

2.

CHECK SELF-DIAG RESULT

Check the screen of CONSULT-lll.

Is malfunctioning part detected?

YES

>> Refer to 

SRC-78, "Diagnosis Procedure (Component diagnosis)"

.

NO

>> INSPECTION END.

DTC CONFIRMATION PROCEDURE (Without CONSULT-lll)

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

1.

INSPECTION START

Turn ignition switch ON.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B1088

PRE-TEN FRONT LH 
[GND-SHORT]

Front LH seat belt pre-tensioner circuit 
is shorted to ground.

• Disconnection of wiring harness and 

short.

• Internal breakdown in front LH seat 

belt pre-tensioner.

• Internal breakdown in diagnosis sen-

sor unit (ACU).