Nissan Qashqai (2007-2010). Manual - part 793

B1071 ASSIST A/B MODULE

SRC-59

< COMPONENT DIAGNOSIS >

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B1071 ASSIST A/B MODULE

Description

INFOID:0000000001069804

DTC B1071 [VB-SHORT] ASSIST A/B MODULE

For front passenger “AIR BAG”, crash is judged by main “G” sensor output signal and sub “G” sensor in front
direction.

OPERATION

In case of frontal collision whose acceleration exceeds the specified level, the ignition materials are ignited by
electric ignition system. The system burns and introduces the chemical reaction of gas generating materials to
generate hot gases that flow into the air bag through a filter and expand the bag.

STRUCTURE

Air bag module mainly consists of air bag and inflator which inflates air bag.

INSTALLATION

Front passenger air bag module is installed on the instrument panel with fixed bolts.

DTC Logic

INFOID:0000000001069805

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

B1071

ASSIST A/B MODULE 
[VB-SHORT]

Front passenger air bag module 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 passenger air bag 
module.

4.

Replace diagnosis sensor unit 
(ACU).

JMHIA0035GB

SRC-60

< COMPONENT DIAGNOSIS >

B1071 ASSIST A/B MODULE

>> GO TO 3.

3.

DTC CODE

If DTC is detected. Refer to 

SRC-60

>> 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-60

>> END

Diagnosis Procedure (Component diagnosis)

INFOID:0000000001069806

B1071 ASSIST A/B MODULE

SRC-61

< 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 wiring harness normal, without any damage?

YES

>> GO TO 3.

NO

>> Replace wiring harness.

3.

CHECK PASSENGER AIR BAG MODULE

Is “AIR BAG” displayed on CONSULT-III?

YES

>> Replace passenger air bag module.

NO

>> Replace diagnosis sensor unit (ACU).

SRC-62

< COMPONENT DIAGNOSIS >

B1072 ASSIST A/B MODULE

B1072 ASSIST A/B MODULE

Description

INFOID:0000000001069807

DTC B1072 [GND-SHORT] ASSIST A/B MODULE

For front passenger “AIR BAG”, crash is judged by main “G” sensor output signal and sub “G” sensor in front
direction.

OPERATION

In case of frontal collision whose acceleration exceeds the specified level, the ignition materials are ignited by
electric ignition system. The system burns and introduces the chemical reaction of gas generating materials to
generate hot gases that flow into the air bag through a filter and expand the bag.

STRUCTURE

Air bag module mainly consists of air bag and inflator which inflates air bag.

INSTALLATION

Front passenger air bag module is installed on the instrument panel with fixed bolts.

DTC Logic

INFOID:0000000001069808

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

B1072

ASSIST A/B MODULE 
[GND-SHORT]

Front passenger air bag module circuit 
is shorted to ground.

1.

Visually check the wiring harness-
connection.

2.

Replace the harness if it has visi-
ble damage.

3.

Replace front passenger air bag 
module.

4.

Replace diagnosis sensor unit 
(ACU).

JMHIA0035GB