Infiniti G35 (V35) Sedan. Manual - part 1232

SRC-76

< COMPONENT DIAGNOSIS >

B1073 ASSIST A/B MODULE

B1073 ASSIST A/B MODULE

Description

INFOID:0000000000959654

DTC B1073 [SHORT] ASSIST A/B MODULE

For front passenger “AIR BAG”, crash is judged by main “G” sensor output signal and sub “G” sensor in front
direction.

OPERATION

In case of frontal 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

Air bag module mainly consists of air bag and inflator which inflates air bag.

INSTALLATION

Front passenger air bag module is installed on the instrument panel with fixed bolts.

DTC Logic

INFOID:0000000000959655

DTC DETECTION LOGIC

With CONSULT-lll

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

Without CONSULT-lll

Warning Lamp Flash Code Chart

DTC CONFIRMATION PROCEDURE (With CONSULT-lll)

1.

IGNITION SWITCH

Turn ignition switch ON.

>> GO TO 2.

2.

CONSULT-LLL

Select “DIAG MODE” with CONSULT-lll.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B1073

ASSIST A/B MODULE 
[SHORT]

Front passenger air bag module circuits   
are shorted to each othor.

1.

Visually check the wiring harness-
connection.

2.

Replace the harness if it has visi-
ble damage.

3.

Replace front passenger air bag 
module.

4.

Replace diagnosis sensor unit 
(ACU).

JMHIA0035GB

B1073 ASSIST A/B MODULE

SRC-77

< COMPONENT DIAGNOSIS >

C

D

E

F

G

I

J

K

L

M

A

B

SRC

N

O

P

>> GO TO 3.

3.

DTC CODE

If DTC is detected. Refer to 

SRC-77

>> END

DTC CONFIRMATION PROCEDURE (Without CONSULT-lll)

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

1.

IGNITION SWITCH

Turn ignition switch ON.

>> GO TO 2.

2.

USER MODE-DIAG MODE

After air bag warning lamp illuminates for 7 seconds, turn ignition switch OFF within 1 second.

>> GO TO 3.

3.

USER MODE-DIAG MODE

Wait more than 3 seconds.

>> GO TO 4.

4.

USER MODE-DIAG MODE

Repeat step 1 to 3 twice. (Perform three times in all.)

>> GO TO 5.

5.

DIAG MODE

Turn ignition switch ON. (SRS is now in diagnosis mode.)

>> GO TO 6.

6.

DIAG MODE (AIR BAG WARNING LAMP)

Malfunctioning portion is indicated according to blinking times of air bag warning lamp. Refer to 

SRC-77

>> END

Diagnosis Procedure (Component diagnosis)

INFOID:0000000000959656

SRC-78

< COMPONENT DIAGNOSIS >

B1073 ASSIST A/B MODULE

With CONSULT-lll

CAUTION:

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

utes. (To discharge backup capacitor.)

• Do not use unspecified tester or other measuring device.

DIAGNOSTIC PROCEDURE

1.

CHECK HARNESS CONNECTOR

Check the harness connector.
Are connections of harness connectors and terminals correct?

YES

>> GO TO 2.

NO

>> Repair or replace harness connector.

2.

CHECK WIRING HARNESS

Check the wiring harness.

Is the outside of wiring harness normal, without any damage?

YES

>> GO TO 3.

NO

>> Replace wiring harness.

3.

CHECK PASSENGER AIR BAG MODULE

Check the displayed on CONSULT-lll?

Is “AIR BAG” displayed on CONSULT-lll?

YES

>> Replace passenger air bag module.

NO

>> Replace diagnosis sensor unit (ACU).

B1074, B1075, B1076, B1077, B1078, B1079 DIAGNOSIS SENSOR UNIT

SRC-79

< COMPONENT DIAGNOSIS >

C

D

E

F

G

I

J

K

L

M

A

B

SRC

N

O

P

B1074, B1075, B1076, B1077, B1078, B1079 DIAGNOSIS SENSOR UNIT

Description

INFOID:0000000000959657

DTC B1074, B1075, B1076, B1077, B1078, B1079 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-lll”.

OPERATION

It detects a shock that exceeds specified level and watches 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 prop-
erly. 

STRUCTURE

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

INSTALLATION

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

DTC Logic

INFOID:0000000000959658

DTC DETECTION LOGIC

With CONSULT-lll

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

Without CONSULT-lll

Warning Lamp Flash Code Chart

DTC CONFIRMATION PROCEDURE (With CONSULT-lll)

1.

IGNITION SWITCH

Turn ignition switch ON.

>> GO TO 2.

2.

CONSULT-LLL

Select “DIAG MODE” with CONSULT-lll.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B1074
B1075
B1076
B1077
B1078
B1079

CONTROL UNIT 

Diagnosis sensor unit is out of order.

1.

Replace diagnosis sensor unit 
(ACU).

JMHIA0034GB