Infiniti QX56 (Z62). Manual - part 1241

SRC-168

< DTC/CIRCUIT DIAGNOSIS >

B1199 CURTAIN AIR BAG MODULE LH

NO

>> INSPECTION END

B1200 CURTAIN AIR BAG MODULE LH

SRC-169

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

I

J

K

L

M

A

B

SRC

N

O

P

B1200 CURTAIN AIR BAG MODULE LH

DTC Logic

INFOID:0000000006220122

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-169, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006220123

WARNING:

• Before servicing, turn ignition switch OFF, disconnect battery negative terminal, and wait at least 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 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-169, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 4. 

NO

>> INSPECTION END

4.

REPLACE FRONT CURTAIN AIR BAG MODULE

1.

Replace front curtain air bag module LH. Refer to 

SR-19, "Removal and Installation"

2.

Perform DTC confirmation procedure. Refer to 

SRC-169, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 1. 

DTC

Display contents of 

CONSULT-III

DTC detecting condition

Possible cause

B1200

CURTAIN MODULE LH 
[GND-SHORT]

Front curtain air bag module LH circuit is 
shorted to ground

• Disconnection of wiring harness and short
• Malfunction in front curtain air bag module LH
• Malfunction in air bag diagnosis sensor unit

SRC-170

< DTC/CIRCUIT DIAGNOSIS >

B1200 CURTAIN AIR BAG MODULE LH

NO

>> INSPECTION END

B1201 CURTAIN AIR BAG MODULE LH

SRC-171

< DTC/CIRCUIT DIAGNOSIS >

C

D

E

F

G

I

J

K

L

M

A

B

SRC

N

O

P

B1201 CURTAIN AIR BAG MODULE LH

DTC Logic

INFOID:0000000006220124

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-171, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006220125

WARNING:

• Before servicing, turn ignition switch OFF, disconnect battery negative terminal, and wait at least 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 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-171, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 4. 

NO

>> INSPECTION END

4.

REPLACE FRONT CURTAIN AIR BAG MODULE

1.

Replace front curtain air bag module LH. Refer to 

SR-19, "Removal and Installation"

2.

Perform DTC confirmation procedure. Refer to 

SRC-171, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 1. 

DTC

Display contents of 

CONSULT-III

DTC detecting condition

Possible cause

B1201

CURTAIN MODULE 
LH 
[SHORT]

Front curtain air bag module LH circuits are 
shorted to each other

• Disconnection of wiring harness and short
• Malfunction in front curtain air bag module LH
• Malfunction in air bag diagnosis sensor unit