Infiniti FX35, FX50 (S51). Manual - part 1719

B1033, B1034 CRASH ZONE SEN

SRC-41

< DTC/CIRCUIT DIAGNOSIS >

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B1033, B1034 CRASH ZONE SEN

Description

INFOID:0000000005241088

Main “G” sensor generates signal voltage, when it detects deceleration beyond the specified level caused by
vehicle frontal collision.

OPERATION

When air bag diagnosis sensor unit defines both signal voltage of the “G” sensor and the safing algorithm to
be that of collision which exceeds a specified level, the driving circuit switches on and feeds the electric ignitor
of both driver and passenger air bags and pre-tensioner seat belts.

STRUCTURE

Integrated type of the “G” sensor element for frontal collision with output terminals for signal voltage.

INSTALLATION

Crash zone sensor is installed on the radiator core support assembly with fixed nuts.

DTC Logic

INFOID:0000000005241089

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-41, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005241090

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.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace wiring harness.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B1033
B1034

CRASH ZONE SEN-
SOR 
[UNIT FAIL]

Crash zone sensor is malfunctioning

• Disconnection of wiring harness
• Malfunction in crash zone sensor
• Malfunction in air bag diagnosis sen-

sor unit

SRC-42

< DTC/CIRCUIT DIAGNOSIS >

B1033, B1034 CRASH ZONE SEN

3.

REPLACE CRASH ZONE SENSOR

1.

Replace crash zone sensor. Refer to 

SR-21, "Exploded View"

.

2.

Perform DTC confirmation procedure. Refer to 

SRC-41, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 4.

NO

>> INSPECTION END

4.

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-41, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 1.

NO

>> INSPECTION END

B1035, B1036 CRASH ZONE SEN

SRC-43

< DTC/CIRCUIT DIAGNOSIS >

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B1035, B1036 CRASH ZONE SEN

Description

INFOID:0000000005241091

Main “G” sensor generates signal voltage, when it detects deceleration beyond the specified level caused by
vehicle frontal collision.

OPERATION

When air bag diagnosis sensor unit defines both signal voltage of the “G” sensor and the safing algorithm to
be that of collision which exceeds a specified level, the driving circuit switches on and feeds the electric ignitor
of both driver and passenger air bags and pre-tensioner seat belts.

STRUCTURE

Integrated type of the “G” sensor element for frontal collision with output terminals for signal voltage.

INSTALLATION

Crash zone sensor is installed on the radiator core support assembly with fixed nuts.

DTC Logic

INFOID:0000000005241092

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-43, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005241093

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.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace wiring harness.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B1035
B1036

CRASH ZONE SEN-
SOR 
[COMM FAIL]
[UNMATCH]

Crash zone sensor is malfunctioning or 
out of the specified specification

• Disconnection of wiring harness
• Malfunction in crash zone sensor
• Malfunction in air bag diagnosis sen-

sor unit

SRC-44

< DTC/CIRCUIT DIAGNOSIS >

B1035, B1036 CRASH ZONE SEN

3.

REPLACE CRASH ZONE SENSOR

1.

Replace crash zone sensor. Refer to 

SR-21, "Exploded View"

.

2.

Perform DTC confirmation procedure. Refer to 

SRC-43, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 4.

NO

>> INSPECTION END

4.

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-43, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 1.

NO

>> INSPECTION END