2011 INFINITI QX56 Factory Service Manual

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Page 4345 of 5598

INFINITI QX56 2011 Factory Service Manual
SBC-48
< DTC/CIRCUIT DIAGNOSIS >
B2463 ROLLOVER SIGNAL
B2463 ROLLOVER SIGNAL
DescriptionINFOID:0000000006237919
Inputs the rollover signal from air bag diagnosis sensor unit via CAN communication.
DT

Page 4346 of 5598

INFINITI QX56 2011 Factory Service Manual
B2466 DR/AS CONTROL UNITSBC-49
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G
I
J
K L
M A
B
SBC
N
O P
B2466 DR/AS CONTROL UNIT
DTC LogicINFOID:0000000006237922
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.SE

Page 4347 of 5598

INFINITI QX56 2011 Factory Service Manual
SBC-50
< DTC/CIRCUIT DIAGNOSIS >
B2470 SYS HEAT PROTC DR
B2470 SYS HEAT PROTC DR
DescriptionINFOID:0000000006237924
When fastening and unfastening seat belt or opening and closing door is repeated co

Page 4348 of 5598

INFINITI QX56 2011 Factory Service Manual
B2471 SYS HEAT PROTC ASSBC-51
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G
I
J
K L
M A
B
SBC
N
O P
B2471 SYS HEAT PROTC AS
DescriptionINFOID:0000000006237927
When fastening and unfastening seat belt or opening

Page 4349 of 5598

INFINITI QX56 2011 Factory Service Manual
SBC-52
< DTC/CIRCUIT DIAGNOSIS >
POWER SUPPLY AND GROUND CIRCUIT
POWER SUPPLY AND GROUND CIRCUIT
Diagnosis ProcedureINFOID:0000000006237930
1.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disc

Page 4350 of 5598

INFINITI QX56 2011 Factory Service Manual
SEAT BELT BUCKLE SWITCH (DRIVER SIDE)
SBC-53
< DTC/CIRCUIT DIAGNOSIS >
C
D E
F
G
I
J
K L
M A
B
SBC
N
O P
SEAT BELT BUCKLE SW ITCH (DRIVER SIDE)
Component Function CheckINFOID:0000000006237931
1.CHECK

SEAT BELT BUCKLE SWITCH (DRIVER SIDE)
SBC-53
< DTC/CIRCUIT DIAGNOSIS >
C
D E
F
G
I
J
K L
M A
B
SBC
N
O P
SEAT BELT BUCKLE SW ITCH (DRIVER SIDE)
Component Function CheckINFOID:0000000006237931
1.CHECK SEAT BELT WARNING LAMP FUNCTION
1. Turn ignition switch ON.
2. Sits in the passenger seat.
3. Fasten the seat belt (passenger side).
4. Check seat belt warning lamp function.
Is the inspection results normal?
YES >> GO TO 2.
NO >> Check seat belt warning lamp circuit. Refer to SBC-57, "
Diagnosis Procedure".
2.CHECK PRE-CRASH SEAT BELT CONTROL UNIT (DRIVER SIDE) FUNCTION
With CONSULT-III
When checking “BUCKLE SW LH” on DATA MONITOR scr een, check that ON/OFF display changes synchro-
nized with the insertion operat ion to the seat belt buckle.
Is the inspection result normal?
YES >> Seat belt buckle switch (driver side) circuit is normal.
NO >> Check seat belt buckle switch (driver side). Refer to SBC-53, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006237932
1.CHECK PRE-CRASH SEAT BELT CONTROL UNIT (DRIVER SIDE) OUTPUT SIGNAL
1. Turn ignition switch OFF.
2. Disconnect seat belt assembly (driver side) harness connector.
3. Turn ignition switch ON.
4. Check voltage between seat belt assembly (driver side) harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK SEAT BELT ASSEMB LY (DRIVER SIDE) CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect pre-crash seat belt control unit (driver side) harness connector.
3. Check continuity between pre-crash seat belt cont rol unit (driver side) harness connector and seat belt
assembly (driver side) harness connector.
Condition Seat belt warning lamp
Seat belt (driver side) is fastened Not illuminated
Seat belt (driver side) is unfastened Illuminated
Monitor item Condition
BUCKLE SW LH When driver side seat belt is not fastened: OFF
When driver side seat belt is fastened: ON
(+)
(–)Voltage (V)
(Approx.)
Seat belt assembly (driver side)
Connector Terminal B76 5 Ground 5
Pre-crash seat belt control unit (driver side) Seat belt assembly (driver side) Continuity
Connector Terminal Connector Terminal
B9 6 B76 5 Existed
Revision: 2010 May2011 QX56

Page 4351 of 5598

INFINITI QX56 2011 Factory Service Manual
SBC-54
< DTC/CIRCUIT DIAGNOSIS >
SEAT BELT BUCKLE SWITCH (DRIVER SIDE)
4. Check continuity between pre-crash seat belt control unit (driver side) harness connector and ground.
Is the inspection resul

Page 4352 of 5598

INFINITI QX56 2011 Factory Service Manual
SEAT BELT BUCKLE SWITCH (PASSENGER SIDE)SBC-55
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G
I
J
K L
M A
B
SBC
N
O P
SEAT BELT BUCKLE SW ITCH (PASSENGER SIDE)
Component Function CheckINFOID:0000000006237934
1.C

SEAT BELT BUCKLE SWITCH (PASSENGER SIDE)SBC-55
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G
I
J
K L
M A
B
SBC
N
O P
SEAT BELT BUCKLE SW ITCH (PASSENGER SIDE)
Component Function CheckINFOID:0000000006237934
1.CHECK SEAT BELT WARNING LAMP FUNCTION
1. Turn ignition switch ON.
2. Sits in the passenger seat.
3. Fasten the seat belt (passenger side).
4. Check seat belt warning lamp function.
Is the inspection results normal?
YES >> GO TO 2.
NO >> Check seat belt warning lamp circuit. Refer to SBC-57, "
Diagnosis Procedure".
2.CHECK PRE-CRASH SEAT BELT CONTROL UNIT FUNCTION
With CONSULT-III
When checking “BUCKLE SW RH” on DATA MONITOR scr een, check that ON/OFF display changes are syn-
chronized with the insertion operation to the seat belt buckle.
Is the inspection result normal?
YES >> Seat belt buckle switch (passenger side) circuit is normal.
NO >> Check seat belt buckle switch (passenger side). Refer to SBC-55, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006237935
1.CHECK PRE-CRASH SEAT BELT CONTROL UNIT (PASSENGER SIDE) OUTPUT SIGNAL
1. Turn ignition switch OFF.
2. Disconnect seat belt assembly (passenger side) harness connector.
3. Turn ignition switch ON.
4. Check voltage between seat belt assembly (passenger side) and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK SEAT BELT ASSEMBLY (PASSENGER SIDE) CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect pre-crash seat belt contro l unit (passenger side) harness connector.
3. Check continuity between pre-crash seat belt c ontrol unit (passenger side) harness connector and seat
belt assembly (passenger side) harness connector.
Condition Seat belt warning lamp
Seat belt (driver side) is fastened Not illuminated
Seat belt (driver side) is unfastened Illuminated
Monitor item Condition
BUCKLE SW RH When driver side seat belt is not fastened: OFF
When driver side seat belt is fastened: ON
(+)
(–)Voltage (V)
(Approx.)
Seat belt assembly (passenger side)
Connector Terminal B245 5 Ground 5
Pre-crash seat belt control unit (passenger side) Seat belt assembly (passenger side) Continuity
Connector Terminal Connector Terminal
B2316B2455Existed
Revision: 2010 May2011 QX56

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