Infiniti QX56 (Z62). Manual - part 1215

SRC-64

< 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-14, "Removal and Installation"

.

4.

REPLACE AIR BAG DIAGNOSIS SENSOR UNIT

1.

Replace air bag diagnosis sensor unit. Refer to 

SR-26, "Removal and Installation"

.

2.

Perform DTC confirmation procedure. Refer to 

SRC-63, "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-11, "Removal and Installation"

.

2.

Perform DTC confirmation procedure. Refer to 

SRC-63, "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-65

< DTC/CIRCUIT DIAGNOSIS >

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B1050, B1055 DRIVER AIR BAG MODULE

DTC Logic

INFOID:0000000006219998

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

CHECK SELF-DIAG RESULT

 With CONSULT-III

1.

Turn ignition switch ON.

2.

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

 Without CONSULT-III

1.

Turn ignition switch ON.

2.

Check the air bag warning lamp status. Refer to 

SRC-14, "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:0000000006219999

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-14, "Removal and Installation"

.

2.

Perform DTC confirmation procedure. Refer to 

SRC-65, "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-26, "Removal and Installation"

.

2.

Perform DTC confirmation procedure. Refer to 

SRC-65, "DTC Logic"

.

DTC

Display contents of 

CONSULT-III

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-66

< 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-11, "Removal and Installation"

.

2.

Perform DTC confirmation procedure. Refer to 

SRC-65, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 1.

NO

>> INSPECTION END

B1051, B1056 DRIVER AIR BAG MODULE

SRC-67

< DTC/CIRCUIT DIAGNOSIS >

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B1051, B1056 DRIVER AIR BAG MODULE

DTC Logic

INFOID:0000000006220000

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

CHECK SELF-DIAG RESULT

 With CONSULT-III

1.

Turn ignition switch ON.

2.

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

 Without CONSULT-III

1.

Turn ignition switch ON.

2.

Check the air bag warning lamp status. Refer to 

SRC-14, "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:0000000006220001

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-III

DTC detecting condition

Possible cause

B1051
B1056

DRIVER AIRBAG 
MODULE 
[GND-SHORT]

Driver air bag module circuit is shorted to ground
(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