Nissan Qashqai (2007-2010). Manual - part 799

B1086 PRE-TEN FRONT LH

SRC-83

< COMPONENT DIAGNOSIS >

C

D

E

F

G

I

J

K

L

M

A

B

SRC

N

O

P

B1086 PRE-TEN FRONT LH

Description

INFOID:0000000001069828

DTC B1086 [OPEN] PRE-TEN FRONT LH

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

OPERATION

In case of frontal collision that exceeds specified impact level, the diagnosis sensor unit detects the decelera-
tion caused by collision. If restrains the passenger with seat belt easing the stress on passengers chest with
load limitter.

STRUCTURE

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

INSTALLATION

Seat belt pre-tensioner is installed on the under side of center pillar with fixed nuts.

DTC Logic

INFOID:0000000001069829

DTC DETECTION LOGIC

With CONSULT-III

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

Without CONSULT-III

Warning Lamp Flash Code Chart

DTC CONFIRMATION PROCEDURE (With CONSULT-III)

1.

IGNITION SWITCH

Turn ignition switch ON.

>> GO TO 2.

2.

CONSULT-III

Check the “SELF-DIAG” RESULT with CONSULT-III.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B1086

PRE-TEN FRONT LH 
[OPEN]

Front LH seat belt pre-tensioner circuit 
is open.

1.

Visually check the wiring harness-
connection.

2.

Replace the harness if it has visi-
ble damage.

3.

Replace front LH seat belt.

4.

Replace diagnosis sensor unit 
(ACU).

JMHIA0038GB

SRC-84

< COMPONENT DIAGNOSIS >

B1086 PRE-TEN FRONT LH

>> GO TO 3.

3.

DTC CODE.

If DTC is detected. Refer to 

SRC-84

>> END

DTC CONFIRMATION PROCEDURE (Without CONSULT-III)

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

1.

IGNITION SWITCH

Turn ignition switch ON.

>> GO TO 2.

2.

USER MODE-DIAG MODE

After air bag warning lamp illuminates for 7 seconds, turn ignition switch OFF within 1 second.

>> GO TO 3.

3.

USER MODE-DIAG MODE

Wait more than 3 seconds.

>> GO TO 4.

4.

USER MODE-DIAG MODE

Repeat step 1 to 3 twice. (Perform three times in all.)

>> GO TO 5.

5.

DIAG MODE

Turn ignition switch ON. (SRS is now in diagnosis mode.)

>> GO TO 6.

6.

DIAG MODE (AIR BAG WARNING LAMP)

Malfunctioning portion is indicated according to blinking times of air bag warning lamp. Refer to 

SRC-84

>> END

Diagnosis Procedure (Component diagnosis)

INFOID:0000000001069830

B1086 PRE-TEN FRONT LH

SRC-85

< COMPONENT DIAGNOSIS >

C

D

E

F

G

I

J

K

L

M

A

B

SRC

N

O

P

With CONSULT-III

CAUTION:

• 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

Are connections of harness connectors and terminals correct?

YES

>> GO TO 2.

NO

>> Repair or replace harness connector.

2.

CHECK WIRING HARNESS

Is the outside of wire harness normal, without any damage?

YES

>> GO TO 3.

NO

>> Replace wiring harness.

3.

CHECK SEAT BELT PRE-TENSIONER

Is “SEAT BELT PRE-TENSIONER” displayed on CONSULT-III?

YES

>> Replace seat belt pre-tensioner.

NO

>> Replace diagnosis sensor unit (ACU).

SRC-86

< COMPONENT DIAGNOSIS >

B1087 PRE-TEN FRONT LH

B1087 PRE-TEN FRONT LH

Description

INFOID:0000000001069831

DTC B1087 [VB-SHORT] PRE-TEN FRONT LH

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

OPERATION

In case of frontal collision that exceeds specified impact level, the diagnosis sensor unit detects the decelera-
tion caused by collision. If restrains the passenger with seat belt easing the stress on passengers chest with
load limitter.

STRUCTURE

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

INSTALLATION

Seat belt pre-tensioner is installed on the under side of center pillar with fixed nuts.

DTC Logic

INFOID:0000000001069832

DTC DETECTION LOGIC

With CONSULT-III

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

Without CONSULT-III

Warning Lamp Flash Code Chart

DTC CONFIRMATION PROCEDURE (With CONSULT-III)

1.

IGNITION SWITCH

Turn ignition switch ON.

>> GO TO 2.

2.

CONSULT-III

Check the “SELF-DIAG” RESULT with CONSULT-III.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B1087

PRE-TEN FRONT LH
[VB-SHORT]

Front LH seat belt pretensioner circuit is 
shorted to some power supply circuit.

1.

Visually check the wiring harness-
connection.

2.

Replace the harness if it has visi-
ble damage.

3.

Replace front LH seat belt.

4.

Replace diagnosis sensor unit 
(ACU).

JMHIA0038GB