Infiniti EX35. Manual - part 1351

SRC-30

< COMPONENT DIAGNOSIS >

B1023 PASS A/B INDCTR CKT

B1023 PASS A/B INDCTR CKT

Description

INFOID:0000000003591737

DTC B1023 PASS A/B INDCTR CKT

Suppresses the deployment of front passenger air bag when the condition of passenger seat is empty or child
and child-seat. And turns on front passenger air bag OFF indicator (Cut-off telltale) lamp when the condition of
passenger seat is child-seat and child. In case of malfunction the blinking of the air bag warning lamp reports
the malfunction to driver and by the on board self-diagnosis system or electro-diagnosis tester CONSULT-III
can detect the cause.

OPERATION

Turns on front passenger air bag OFF indicator (Cut-off telltale) when the passenger seat is empty or occupied
by child-seat and child.

STRUCTURE

Front passenger air bag OFF indicator (Cut-off telltale) with LED illumination.

INSTALLATION

Front passenger air bag OFF indicator (Cut-off telltale) is installed at the instrument panel center.

DTC Logic

INFOID:0000000003591738

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-30, "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:0000000003591739

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

B1023

PASS A/B INDCTR CKT 
[UNIT FAIL]

Cut-off telltale circuit is open or shorted 
to ground or the circuits are shorted 
each other

• Disconnection of wiring harness
• Internal breakdown in front passen-

ger air bag OFF indicator

• Internal breakdown in air bag diag-

nosis sensor unit

B1023 PASS A/B INDCTR CKT

SRC-31

< 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 PASSENGER AIR BAG OFF INDICATOR

1.

Replace front passenger air bag OFF indicator (Cut-off telltale). Refer to 

IP-11, "Exploded View"

2.

Check “Self diagnostic result” with CONSULT-III.

3.

Perform DTC confirmation procedure. Refer to 

SRC-30, "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 diagnostic result” with CONSULT-III.

3.

Perform DTC confirmation procedure. Refer to 

SRC-30, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 1.

NO

>> INSPECTION END

SRC-32

< COMPONENT DIAGNOSIS >

B1026, B1027, B1028, B1029, B1030, B1031 DIAGNOSIS SENSOR UNIT

B1026, B1027, B1028, B1029, B1030, B1031 DIAGNOSIS SENSOR UNIT

Description

INFOID:0000000003591741

DTC B1026, B1027, B1028, B1029, B1030, B1031 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, side air bag, curtain air bag, pre-tensioner seat belts and Occupant Classification System (OCS) 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:0000000003591742

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-32, "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:0000000003591743

WITH CONSULT-III

WARNING:

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B1026
B1027
B1028
B1029
B1030
B1031

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

B1026, B1027, B1028, B1029, B1030, B1031 DIAGNOSIS SENSOR UNIT

SRC-33

< COMPONENT DIAGNOSIS >

C

D

E

F

G

I

J

K

L

M

A

B

SRC

N

O

P

• 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. 

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 diagnostic result” with CONSULT-III.

3.

Perform DTC confirmation procedure. Refer to 

SRC-32, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 1.

NO

>> INSPECTION END