Infiniti EX35. Manual - part 1365

SRC-86

< COMPONENT DIAGNOSIS >

B1122, B1123, B1124, B1125, B1126, B1127 DIAGNOSIS SENSOR UNIT

B1122, B1123, B1124, B1125, B1126, B1127 DIAGNOSIS SENSOR UNIT

Description

INFOID:0000000003595949

DTC B1122, B1123, B1124, B1125, B1126, B1127 DIAGNOSIS SENSOR UNIT

Detects the whole SRS electrical system and displays the malfunction either by illuminating or blinking the air
bag warning lamp in the combination meter. Malfunctioning part can be detected by on board self-diagnosis
system and electro-diagnosis tester CONSULT-III.

OPERATION

It detects a shock that exceeds specified level and monitors such systems as the driver and passenger air
bag, front side air bag, side curtain air bag and pre-tensioner seat belts operate properly. 

STRUCTURE

It contains the “G” sensors for both frontal and side collisions and spare battery function in case of main bat-
tery damage in collision.

INSTALLATION

Air bag diagnosis sensor unit is installed under the center console with fixed bolts.

DTC Logic

INFOID:0000000003595950

DTC DETECTION LOGIC

With CONSULT-III

DTC No. Index (“SELF-DIAG [CURRENT]”), (“SELF-DIAG [PAST]” or “TROUBLE DIAG RECORD”)

DTC CONFIRMATION PROCEDURE (WITH CONSULT-III)

1.

CHECK SELF-DIAG RESULT

1.

Turn ignition switch ON.

2.

Check the screen of CONSULT-III.

Is malfunctioning part detected?

YES

>> Refer to 

SRC-86, "Diagnosis Procedure"

.

NO

>> INSPECTION END

DTC CONFIRMATION PROCEDURE (WITHOUT CONSULT-III)

NOTE:
• SRS will not enter diagnosis mode if no malfunction is detected in user mode.

1.

CHECK AIR BAG WARNING LAMP

1.

Turn ignition switch ON.

2.

Check the air bag warning lamp status.

Is malfunctioning part detected?

YES

>> Refer to warning lamp flash code chart. Refer to 

SRC-128, "DTC Index"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000003595951

WITH CONSULT-III

WARNING:

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

minutes. (To discharge backup capacitor.)

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B1122
B1123
B1124
B1125
B1126
B1127

CONTROL UNIT 

Air bag diagnosis sensor unit is out of 
order or mis-match

• Internal breakdown in air bag diag-

nosis sensor unit

• Mis-match between specification on 

vehicle and configuration in air bag 
diagnosis sensor unit

B1122, B1123, B1124, B1125, B1126, B1127 DIAGNOSIS SENSOR UNIT

SRC-87

< COMPONENT DIAGNOSIS >

C

D

E

F

G

I

J

K

L

M

A

B

SRC

N

O

P

• Do not use unspecified tester or other measuring device. 

DIAGNOSTIC PROCEDURE

1.

CHECK HARNESS CONNECTOR

Check the connection of harness connector.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace harness connectors.

2.

CHECK WIRING HARNESS

Check the wiring harness externals.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace wiring harness.

3.

CHECK AIR BAG DIAGNOSIS SENSOR UNIT

1.

Replace air bag diagnosis sensor unit. Refer to 

SR-16, "Exploded View"

.

2.

Check “Self diagnosis result” with CONSULT-III.

3.

Perform DTC confirmation procedure. Refer to 

SRC-86, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 1. 

NO

>> INSPECTION END

SRC-88

< COMPONENT DIAGNOSIS >

B1129 SIDE MODULE RH

B1129 SIDE MODULE RH

Description

INFOID:0000000003595952

DTC B1129 [OPEN] SIDE MODULE RH

For front RH side air bag module, crash is judged by main “G” sensor output signal (left side:LH satellite sen-
sor, right side:RH satellite sensor) and Safing algorithm (in air bag diagnosis sensor unit).

OPERATION

In the case of a 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

Front RH side air bag module mainly consists of air bag and inflator which inflates air bag.

INSTALLATION

Front RH side air bag module is installed on the side of front seat back with fixed nuts.

DTC Logic

INFOID:0000000003595953

DTC DETECTION LOGIC

With CONSULT-III

DTC No. Index (“SELF-DIAG [CURRENT]”), (“SELF-DIAG [PAST]” or “TROUBLE DIAG RECORD”)

DTC CONFIRMATION PROCEDURE (WITH CONSULT-III)

1.

CHECK SELF-DIAG RESULT

1.

Turn ignition switch ON.

2.

Check the screen of CONSULT-III.

Is malfunctioning part detected?

YES

>> Refer to 

SRC-88, "Diagnosis Procedure"

.

NO

>> INSPECTION END

DTC CONFIRMATION PROCEDURE (WITHOUT CONSULT-III)

NOTE:
• SRS will not enter diagnosis mode if no malfunction is detected in user mode.

1.

CHECK AIR BAG WARNING LAMP

1.

Turn ignition switch ON.

2.

Check the air bag warning lamp status.

Is malfunctioning part detected?

YES

>> Refer to warning lamp flash code chart. Refer to 

SRC-128, "DTC Index"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000003595954

WITH CONSULT-III

WARNING:

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

minutes. (To discharge backup capacitor.)

• Do not use unspecified tester or other measuring device. 

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B1129

SIDE MODULE RH
[OPEN]

Front RH side air bag module circuit is 
open

• Disconnection of wiring harness and 

open

• Internal breakdown in front RH side 

air bag module

• Internal breakdown in air bag diag-

nosis sensor unit

B1129 SIDE MODULE RH

SRC-89

< COMPONENT DIAGNOSIS >

C

D

E

F

G

I

J

K

L

M

A

B

SRC

N

O

P

DIAGNOSTIC PROCEDURE

1.

CHECK HARNESS CONNECTOR

Check the connection of 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 FRONT SIDE AIR BAG MODULE

1.

Replace front RH side air bag module. Refer to 

SR-10, "Exploded View"

.

2.

Check “Self diagnosis result” with CONSULT-III.

3.

Perform DTC confirmation procedure. Refer to 

SRC-88, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 4. 

NO

>> INSPECTION END

4.

CHECK AIR BAG DIAGNOSIS SENSOR UNIT

1.

Replace air bag diagnosis sensor unit. Refer to 

SR-16, "Exploded View"

.

2.

Check “Self diagnosis result” with CONSULT-III.

3.

Perform DTC confirmation procedure. Refer to 

SRC-88, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 1. 

NO

>> INSPECTION END