Nissan Qashqai (2007-2010). Manual - part 790

B1056 DRIVER AIRBAG MODULE

SRC-47

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B1056 DRIVER AIRBAG MODULE

Description

INFOID:0000000001069792

DTC B1056 [GND-SHORT] DRIVER AIRBAG MODULE

For driver “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

Driver air bag module is installed on the center of steering wheel with retaining clips.

DTC Logic

INFOID:0000000001069793

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

B1056

DRIVER AIRBAG MOD-
ULE 
[GND-SHORT]

Driver air bag module circuit is shorted 
to ground
(including the spiral cable).

1.

Visually check the wiring harness-
connection.

2.

Replace the harness if it has visi-
ble damage.

3.

Replace driver air bag module.

4.

Replace spiral cable.

5.

Replace diagnosis sensor unit 
(ACU).

JMHIA0033GB

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< COMPONENT DIAGNOSIS >

B1056 DRIVER AIRBAG MODULE

>> GO TO 3.

3.

DTC CODE

If DTC is detected. Refer to 

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>> 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-48

>> END

Diagnosis Procedure (Component diagnosis)

INFOID:0000000001069794

With CONSULT-III

CAUTION:

B1056 DRIVER AIRBAG MODULE

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• 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 SPIRAL CABLE 

Is continuity of spiral cable good?

YES

>> GO TO 4.

NO

>> Repair or replace spiral cable.

4.

CHECK DRIVER AIR BAG MODULE

Is “AIR BAG” displayed on CONSULT-lll?

YES

>> Replace driver air bag module

NO

>> Replace diagnosis sensor unit (ACU).

SRC-50

< COMPONENT DIAGNOSIS >

B1057 DRIVER AIRBAG MODULE

B1057 DRIVER AIRBAG MODULE

Description

INFOID:0000000001069795

DTC B1057 [SHORT] DRIVER AIRBAG MODULE

For driver “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

Driver air bag module is installed on the center of steering wheel with retaining clips.

DTC Logic

INFOID:0000000001069796

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

B1057

DRIVER AIRBAG MOD-
ULE 
[SHORT]

Driver air bag module circuit are shorted 
to each othor
(including the spiral cable).

1.

Visually check the wiring harness-
connection.

2.

Replace the harness if it has visi-
ble damage.

3.

Replace driver air bag module.

4.

Replace spiral cable.

5.

Replace diagnosis sensor unit 
(ACU).

JMHIA0033GB