Nissan Qashqai (2007-2010). Manual - part 820

B1177 PRE-TEN2 FRONT RH

SRC-167

< COMPONENT DIAGNOSIS >

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B1177 PRE-TEN2 FRONT RH

Description

INFOID:0000000001070026

DTC B1177 [OPEN] PRE-TEN2 FRONT RH

For seat belt pre-tensioner2, crash is judged by main “G” sensor output signal and sub “G” sensor in front
direction.

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-tensioner2 is installed on the under side of center pillar with fixed bolt.

DTC Logic

INFOID:0000000001070027

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

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B1177

PRE-TEN2 FRONT RH 
[OPEN]

Front RH seat belt pre-tensioner2 circuit 
is open.

1.

Visually check the wiring harness-
connection.

2.

Replace the harness if it has visi-
ble damage.

3.

Replace front RH seat belt pre-
tensioner2.

4.

Replace diagnosis sensor unit 
(ACU).

JMHIA0223GB

SRC-168

< COMPONENT DIAGNOSIS >

B1177 PRE-TEN2 FRONT RH

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

>> GO TO 3.

3.

DTC CODE

If DTC is detected. Refer to 

SRC-168

>> 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-168

>> END

Diagnosis Procedure (Component diagnosis)

INFOID:0000000001070028

B1177 PRE-TEN2 FRONT RH

SRC-169

< COMPONENT DIAGNOSIS >

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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-TENSIONER2

Is “SEAT BELT PRE-TENSIONER2” displayed on CONSULT-III?

YES

>> Replace seat belt pre-tensioner2.

NO

>> Replace diagnosis sensor unit (ACU).

SRC-170

< COMPONENT DIAGNOSIS >

B1178 PRE-TEN2 FRONT RH

B1178 PRE-TEN2 FRONT RH

Description

INFOID:0000000001070029

DTC B1178 [VB-SHORT] PRE-TEN2 FRONT RH

For seat belt pre-tensioner2, crash is judged by main "G" sensor output signal and sub "G" sensor in front
direction.

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-tensioner2 is installed on the under side of center pillar with fixed bolt.

DTC Logic

INFOID:0000000001070030

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

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B1178

PRE-TEN2 FRONT RH 
[VB-SHORT]

Front RH seat belt pre-tensioner2 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 RH seat belt pre-
tensioner2.

4.

Replace diagnosis sensor unit 
(ACU).

JMHIA0223GB