sensor INFINITI QX56 2011 Factory Service Manual

SRC-44
< DTC/CIRCUIT DIAGNOSIS >
B1017, B1020, B1021 OCCUPANT SENS C/U
B1017, B1020, B1021 OCCUPANT SENS C/U
DescriptionINFOID:0000000006219969
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 ch ild. 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 detec ts electrical malfunctions 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 with Occupant Detection System control
unit that classifies the occupants.
INSTALLATION
Occupant Detection System control unit is installed in the passenger seat cushion.
DTC LogicINFOID:0000000006219970
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-44, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006219971
WARNING:
 Before servicing, turn ignition sw itch 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
B1017
B1020
B1021 OCCUPANT SENS C/U
[UNIT FAIL]
Trouble occurs in Occupant Detection
System control unit  Disconnection of wiring harness
 Malfunction in Occupant Detection
System control unit
 Malfunction in air bag diagnosis sen-
sor unit
Revision: 2010 May2011 QX56

B1017, B1020, B1021 OCCUPANT SENS C/U
SRC-45
< DTC/CIRCUIT DIAGNOSIS >
C
D E
F
G
I
J
K L
M A
B
SRC
N
O P
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-44, "
DTC Logic".
Is DTC detected?
YES >> GO TO 1.
NO >> INSPECTION END
Revision: 2010 May2011 QX56

SRC-46
< DTC/CIRCUIT DIAGNOSIS >
B1018 OCCUPANT SENS
B1018 OCCUPANT SENS
DescriptionINFOID:0000000006219972
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 ch ild. 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
The unit classifies occupant in passenger seat and trans mits it to Occupant Detection System control unit.
STRUCTURE
Multiple sensors are installed in the sensor mat to prevent incorrect sensing induced by the sitting position.
INSTALLATION
Occupant Detection System sensor is installed in the passenger seat cushion.
DTC LogicINFOID:0000000006219973
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-46, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006219974
WARNING:
 Before servicing, turn ignition sw itch 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
B1018 OCCUPANT SENS [UNIT FAIL] Malfunction occurs in Occupant Detec-
tion System sensor  Disconnection of wiring harness
 Malfunction in Occupant Detection
System sensor
 Malfunction in Occupant Detection System control unit
 Malfunction in air bag diagnosis sen-
sor unit
Revision: 2010 May2011 QX56

B1018 OCCUPANT SENSSRC-47
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G
I
J
K L
M A
B
SRC
N
O P
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-46, "
DTC Logic".
Is DTC detected?
YES >> GO TO 1.
NO >> INSPECTION END
Revision: 2010 May2011 QX56

SRC-48
< DTC/CIRCUIT DIAGNOSIS >
B1022 OCCUPANT SENS C/U
B1022 OCCUPANT SENS C/U
DescriptionINFOID:0000000006219975
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 ch ild. 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 detec ts 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 LogicINFOID:0000000006219976
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-48, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006219977
WARNING:
 Before servicing, turn ignition sw itch 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
B1022 OCCUPANT SENS C/U [COMM FAIL] 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
 Malfunction in Occupant Detection
System control unit
 Malfunction in air bag diagnosis sen-
sor unit
Revision: 2010 May2011 QX56

B1022 OCCUPANT SENS C/USRC-49
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G
I
J
K L
M A
B
SRC
N
O P
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-48, "
DTC Logic".
Is DTC detected?
YES >> GO TO 1.
NO >> INSPECTION END
Revision: 2010 May2011 QX56

B1023 PASS A/B INDCTR CKTSRC-51
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G
I
J
K L
M A
B
SRC
N
O P
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.
2. Perform DTC confirmation procedure. Refer to SRC-50, "
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-50, "
DTC Logic".
Is DTC detected?
YES >> GO TO 1.
NO >> INSPECTION END
Revision: 2010 May2011 QX56

SRC-52
< DTC/CIRCUIT DIAGNOSIS >
B1025, B1032, B1048 OCS SENSOR
B1025, B1032, B1048 OCS SENSOR
DescriptionINFOID: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 ch ild. 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 detec ts 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 LogicINFOID: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 ProcedureINFOID:0000000006219983
WARNING:
 Before servicing, turn ignition sw itch 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 occu
rs 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
Revision: 2010 May2011 QX56

B1025, B1032, B1048 OCS SENSORSRC-53
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G
I
J
K L
M A
B
SRC
N
O P
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
Revision: 2010 May2011 QX56

SRC-54
< DTC/CIRCUIT DIAGNOSIS >
B1026, B1027, B1028, B1029, B1030, B1031 DIAGNOSIS SENSOR UNIT
B1026, B1027, B1028, B1029, B1030, B1031 DIAGNOSIS SENSOR UNIT
DTC LogicINFOID: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 ProcedureINFOID:0000000006219985
WARNING:
 Before servicing, turn ignition switch OFF, disco nnect 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
Revision: 2010 May2011 QX56