Infiniti QX56 (Z62). Manual - part 1212

 

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Infiniti QX56 (Z62). Manual - part 1212

 

 

SRC-52

< DTC/CIRCUIT DIAGNOSIS >

B1025, B1032, B1048 OCS SENSOR

B1025, B1032, B1048 OCS SENSOR

Description

INFOID:0000000006219981

Suppresses the deployment of front passenger air bag when the condition of passenger seat is empty or occu-
pied with a child and child-seat. Also illuminates front passenger air bag OFF indicator lamp when the condi-
tion of passenger seat is occupied with a 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 CONSULT-III can
detect the cause.

OPERATION

This unit classifies occupant in passenger seat and detects electrical malfunction in Occupant Detection Sys-
tem and transmits malfunction information to air bag control unit.

STRUCTURE

It is integrated into the seat sensor mat and detects the occupants and Occupant Detection System control
unit that classifies the occupants.

INSTALLATION

 Occupant Detection System control unit is installed in the passenger seat cushion.

DTC Logic

INFOID:0000000006219982

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

CHECK SELF-DIAG RESULT

 With CONSULT-III

1.

Turn ignition switch ON.

2.

Perform “AIR BAG” Self Diagnostic Result CONSULT-III.

 Without CONSULT-III

1.

Turn ignition switch ON.

2.

Check the air bag warning lamp status. Refer to 

SRC-14, "On Board Diagnosis Function"

.

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

Is malfunctioning part detected?

YES

>> Refer to 

SRC-52, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006219983

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. 

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.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B1025
B1032
B1048

OCS SENSOR 

Malfunction occurs in Occupant Detec-
tion System control unit, circuit of Occu-
pant Detection System control unit-Air 
bag diagnosis sensor unit or Air bag di-
agnosis sensor unit

• Disconnection of wiring harness
• Internal breakdown in Occupant De-

tection System control unit

• Malfunction in air bag diagnosis sen-

sor unit

B1025, B1032, B1048 OCS SENSOR

SRC-53

< DTC/CIRCUIT DIAGNOSIS >

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2.

CHECK WIRING HARNESS

Check the wiring harness externals.
Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace wiring harness.

3.

REPLACE OCCUPANT DETECTION SYSTEM CONTROL UNIT

1.

Replace occupant detection system control unit. Refer to 

SR-30, "Removal and Installation"

.

2.

Perform DTC confirmation procedure. Refer to 

SRC-44, "DTC Logic"

.

Is DTC detected?

YES

>>  GO TO 4.

NO

>> INSPECTION END

4.

REPLACE OCCUPANT DETECTION SYSTEM SEAT SENSOR

1.

Replace seat cushion frame. Refer to 

SE-105, "Exploded View"

.

2.

Perform DTC confirmation procedure. Refer to 

SRC-44, "DTC Logic"

.

Is DTC detected?

YES

>>  GO TO 5.

NO

>> INSPECTION END

5.

REPLACE AIR BAG DIAGNOSIS SENSOR UNIT

1.

Replace air bag diagnosis sensor unit. Refer to 

SR-26, "Removal and Installation"

.

2.

Perform DTC confirmation procedure. Refer to 

SRC-52, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 1.

NO

>> INSPECTION END

SRC-54

< DTC/CIRCUIT DIAGNOSIS >

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

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

DTC Logic

INFOID:0000000006219984

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

CHECK SELF-DIAG RESULT

 With CONSULT-III

1.

Turn ignition switch ON.

2.

Perform “Self Diagnostic Result” mode of “AIR BAG” using CONSULT-III.

 Without CONSULT-III

1.

Turn ignition switch ON.

2.

Check the air bag warning lamp status. Refer to 

SRC-14, "On Board Diagnosis Function"

.

NOTE:
SRS does not enter the diagnosis mode if no malfunction is detected in the user mode.

Is malfunctioning part detected?

YES

>> Refer to 

SRC-54, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006219985

WARNING:

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

or more. (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.

3.

REPLACE AIR BAG DIAGNOSIS SENSOR UNIT

1.

Replace air bag diagnosis sensor unit. Refer to 

SR-26, "Removal and Installation"

.

2.

Perform DTC confirmation procedure. Refer to 

SRC-54, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 1.

NO

>> INSPECTION END

DTC

Display contents of 

CONSULT-III

DTC detecting condition

Possible cause

B1026
B1027
B1028
B1029
B1030
B1031

CONTROL UNIT 

Air bag diagnosis sensor unit is malfunctioning

Malfunction in air bag diagnosis sensor unit

B1033, B1034 CRASH ZONE SENSOR

SRC-55

< DTC/CIRCUIT DIAGNOSIS >

C

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B1033, B1034 CRASH ZONE SENSOR

DTC Logic

INFOID:0000000006219986

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

CHECK SELF-DIAG RESULT

 With CONSULT-III

1.

Turn ignition switch ON.

2.

Perform “Self Diagnostic Result” mode of “AIR BAG” using CONSULT-III.

 Without CONSULT-III

1.

Turn ignition switch ON.

2.

Check the air bag warning lamp status. Refer to 

SRC-14, "On Board Diagnosis Function"

.

NOTE:
SRS does not enter the diagnosis mode if no malfunction is detected in the user mode.

Is malfunctioning part detected?

YES

>> Refer to 

SRC-55, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006219987

WARNING:

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

or more. (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.

3.

REPLACE CRASH ZONE SENSOR

1.

Replace crash zone sensor. Refer to 

SR-22, "Removal and Installation"

.

2.

Perform DTC confirmation procedure. Refer to 

SRC-55, "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-26, "Removal and Installation"

.

2.

Perform DTC confirmation procedure. Refer to 

SRC-55, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 1.

DTC

Display contents of

CONSULT-III

DTC detecting condition

Possible cause

B1033
B1034

CRASH ZONE SEN 
[UNIT FAIL]

Crash zone sensor is malfunctioning

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

 

 

 

 

 

 

 

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