Nissan Quest E52. Manual - part 1134

 

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Nissan Quest E52. Manual - part 1134

 

 

B1049, B1054 DRIVER AIR BAG MODULE

SRC-65

< DTC/CIRCUIT DIAGNOSIS >

C

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SRC

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B1049, B1054 DRIVER AIR BAG MODULE

DTC Logic

INFOID:0000000009649883

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

CHECK SELF-DIAG RESULT

 With CONSULT

1.

Turn ignition switch ON.

2.

Perform “Self Diagnostic Result” mode of “AIR BAG” using CONSULT.

 Without CONSULT

1.

Turn ignition switch ON.

2.

Check the air bag warning lamp status. Refer to 

SRC-15, "On Board Diagnosis Function"

.

NOTE:
SRS does not enter the diagnosis mode if no malfunction is detected in the user mode.
Is malfunctioning part detected?

YES

>> Refer to 

SRC-65, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009649884

WARNING:

• Before servicing, turn ignition switch OFF, disconnect battery negative terminal, and wait 3 minutes

or more. (To discharge backup capacitor.)

• Never use unspecified tester or other measuring device. 

1.

CHECK HARNESS CONNECTOR

Check the harness connector.
Is the inspection result normal?

YES

>> GO TO 2.

NO

>> 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 SPIRAL CABLE CIRCUIT 

1.

Turn ignition switch OFF.

2.

Disconnect driver air bag module harness connector and combination switch (spiral cable) harness con-
nector.

3.

Check continuity between driver air bag module harness connector and combination switch (spiral cable)
harness connector.

DTC

Display contents of 

CONSULT

DTC detecting condition

Possible cause

B1049
B1054

DRIVER AIRBAG 
MODULE
[OPEN]

Driver air bag module circuit is open
(including the spiral cable)

• Harness or connectors

(The module circuit is open.)

• Malfunction in driver air bag module
• Malfunction in spiral cable
• Malfunction in air bag diagnosis sensor unit

SRC-66

< DTC/CIRCUIT DIAGNOSIS >

B1049, B1054 DRIVER AIR BAG MODULE

4.

Check continuity between driver air bag module harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace combination switch (spiral cable). Refer to 

SR-15, "Removal and Installation"

.

4.

REPLACE AIR BAG DIAGNOSIS SENSOR UNIT

1.

Replace air bag diagnosis sensor unit. Refer to 

SR-29, "Removal and Installation"

.

2.

Perform DTC confirmation procedure. Refer to 

SRC-65, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 5.

NO

>> INSPECTION END

5.

REPLACE DRIVER AIR BAG MODULE

1.

Replace driver air bag module. Refer to 

SR-12, "Removal and Installation"

.

2.

Perform DTC confirmation procedure. Refer to 

SRC-65, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 1.

NO

>> INSPECTION END

Driver air bag module

Combination switch (spiral cable)

Continuity 

Connector

Terminal

Connector

Terminal

M301

10

M32

28

Existed

11

30

M300

12

29

9

30

Driver side air bag module

Ground

Continuity 

Connector

Terminal

M301

10

Not existed

11

M300

12

9

B1050, B1055 DRIVER AIR BAG MODULE

SRC-67

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

I

J

K

L

M

A

B

SRC

N

O

P

B1050, B1055 DRIVER AIR BAG MODULE

DTC Logic

INFOID:0000000009649885

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

CHECK SELF-DIAG RESULT

 With CONSULT

1.

Turn ignition switch ON.

2.

Perform “Self Diagnostic Result” mode of “AIR BAG” using CONSULT.

 Without CONSULT

1.

Turn ignition switch ON.

2.

Check the air bag warning lamp status. Refer to 

SRC-15, "On Board Diagnosis Function"

.

NOTE:
SRS does not enter the diagnosis mode if no malfunction is detected in the user mode.

Is malfunctioning part detected?

YES

>> Refer to 

SRC-67, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009649886

WARNING:

• Before servicing, turn ignition switch OFF, disconnect battery negative terminal, and wait 3 minutes

or more. (To discharge backup capacitor.)

• Never use unspecified tester or other measuring device. 

1.

CHECK HARNESS CONNECTOR

Check the harness connector.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> 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.

REPLACE SPIRAL CABLE

1.

Replace combination switch (spiral cable). Refer to 

SR-15, "Removal and Installation"

.

2.

Perform DTC confirmation procedure. Refer to 

SRC-67, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 4.

NO

>> INSPECTION END

4.

REPLACE AIR BAG DIAGNOSIS SENSOR UNIT

1.

Replace air bag diagnosis sensor unit. Refer to 

SR-29, "Removal and Installation"

.

2.

Perform DTC confirmation procedure. Refer to 

SRC-67, "DTC Logic"

.

DTC

Display contents of 

CONSULT

DTC detecting condition

Possible cause

B1050
B1055

DRIVER AIRBAG 
MODULE 
[VB-SHORT]

Driver air bag module circuit is shorted to 
power supply circuit
(including the spiral cable)

• Harness or connectors

(The module circuit is shorted.)

• Malfunction in driver air bag module
• Malfunction in spiral cable
• Malfunction in air bag diagnosis sensor unit

SRC-68

< DTC/CIRCUIT DIAGNOSIS >

B1050, B1055 DRIVER AIR BAG MODULE

Is DTC detected?

YES

>> GO TO 5.

NO

>> INSPECTION END

5.

REPLACE DRIVER AIR BAG MODULE

1.

Replace driver air bag module. Refer to 

SR-12, "Removal and Installation"

.

2.

Perform DTC confirmation procedure. Refer to 

SRC-67, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 1.

NO

>> INSPECTION END

 

 

 

 

 

 

 

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