Infiniti FX35, FX50 (S51). Manual - part 1714

DIAGNOSIS SYSTEM (AIRBAG)

SRC-21

< SYSTEM DESCRIPTION >

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After selecting “AIR BAG” on the “SELECT SYSTEM” screen, User mode automatically changes to Diagnosis
mode.

From Diagnosis Mode to User Mode

To return to User mode from Diagnosis mode, touch the “BACK” key of CONSULT-III until “SELECT SYSTEM”
appears, then diagnosis mode automatically changes to User mode.

DIAGNOSIS MODE FOR CONSULT-III

HOW TO ERASE SELF-DIAGNOSTIC RESULTS

• “Self Diagnostic Result”

A current self-diagnosis result is displayed on CONSULT-III screen in real time.
After the malfunction is repaired completely, no malfunction is detected on “Self Diagnostic Result”.

• “SELF-DIAG [PAST]”

Return to “Self Diagnostic Result” CONSULT-III screen by touching the “BACK” key of CONSULT-III and
select “Self Diagnostic Result” in SELECT DIAG MODE. Touch “ERASE” in “Self Diagnostic Result” mode.
NOTE:
If the memory of the malfunction in “SELF-DIAG [PAST]” is not erased, the user mode shows the system
malfunction by the operation of the warning lamp even if the malfunction is repaired completely.

• “TROUBLE DIAG RECORD”

The memory of “TROUBLE DIAG RECORD” cannot be erased.

Diagnosis mode

Description

Ecu Identification

Air bag diagnosis sensor unit ECU discriminated number (identification num-
ber) is displayed. Air bag diagnosis sensor unit has individual ECU discriminat-
ed number (identification number) based on model and equipment.

Self Diagnostic Result

The current self diagnosis results (also indicated with the number of air bag 
warning lamp blinks in the diagnosis mode) are displayed on CONSULT-III 
screen in real time. This refers to a malfunctioning part requiring repairs.
Refer to 

SRC-156, "DTC Index"

.

Function Test

CAR COMPUTER DIAG.

Test result is indicated using “OK” or “NG” so that the customer recognizes eas-
ily.

Special function

SELF-DIAG [PAST]

Diagnosis results previously stored in the memory are displayed on CONSULT-
III screen. The stored results are not erased until memory erasing is executed.

TROUBLE DIAG RECORD

With TROUBLE DIAG RECORD, diagnosis results previously erased by a re-
set operation can be displayed on CONSULT-III screen.

SRC-22

< SYSTEM DESCRIPTION >

DIAGNOSIS SYSTEM (OCCUPANT DETECTION SYSTEM)

DIAGNOSIS SYSTEM (OCCUPANT DETECTION SYSTEM)

CONSULT-III Function

INFOID:0000000005241060

ZERO POINT RESET DESCRIPTION

This vehicle adopts occupant detection system with a weight detecting method. When replacing, or removing
and installing passenger seat, always perform “zero point rest” so that the vehicle recognizes zero point.
If zero point reset is incomplete, occupant detection sensor does not operate normally.

WORK SUPPORT

Monitor item

Description

Zero point reset function

Perform zero point reset. Refer to 

SRC-8, "ZERO POINT RE-

SET : Special Repair Requirement"

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B1001, B1002, B1003, B1004, B1005 DIAGNOSIS SENSOR UNIT

SRC-23

< DTC/CIRCUIT DIAGNOSIS >

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DTC/CIRCUIT DIAGNOSIS

B1001, B1002, B1003, B1004, B1005 DIAGNOSIS SENSOR UNIT

Description

INFOID:0000000005241061

Checks the entire SRS and displays the malfunction either by illuminating or blinking the air bag warning lamp
on the combination meter. Malfunctioning part can be detected by on board self-diagnosis system and CON-
SULT-III.

OPERATION

It detects a shock that exceeds a specified level and monitors whether the driver and passenger air bags, front
side air bag, side curtain air bag, and pre-tensioner seat belts operate normally. 

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:0000000005241062

DTC CONFIRMATION PROCEDURE

1.

CHECK SELF-DIAG RESULT

 With CONSULT-III

1.

Turn ignition switch ON.

2.

Perform “AIR BAG” Self Diagnostic Result.

 Without CONSULT-III

1.

Turn ignition switch ON.

2.

Check the air bag warning lamp status. Refer to 

SRC-16, "Air Bag Warning Lamp Diagnosis"

.

NOTE:
SRS does not enter diagnosis mode if no malfunction is detected in user mode.
Is malfunctioning part detected?

YES

>> Refer to 

SRC-23, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005241063

WARNING:

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

minutes. (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 connectors.

2.

CHECK WIRING HARNESS

Check the wiring harness externals.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B1001
B1002
B1003
B1004
B1005

CONTROL UNIT

Air bag diagnosis sensor unit is mal-
functioning or out of the specification

• Malfunction in air bag diagnosis sen-

sor unit

• Configuration in air bag diagnosis 

sensor unit does not match the vehi-
cles specification 

SRC-24

< DTC/CIRCUIT DIAGNOSIS >

B1001, B1002, B1003, B1004, B1005 DIAGNOSIS SENSOR UNIT

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-25, "Exploded View"

.

2.

Perform DTC confirmation procedure. Refer to 

SRC-23, "DTC Logic"

.

Is DTC detected?

YES

>>  GO TO 1.

NO

>> INSPECTION END