2011 INFINITI QX56 Factory Service Manual

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Page 4337 of 5598

INFINITI QX56 2011 Factory Service Manual
SBC-40
< DTC/CIRCUIT DIAGNOSIS >
B2453 BR STROKE SEN CIRC
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace brake pedal stroke sensor. Refer to SBC-63, "
Removal and Installation".

Page 4338 of 5598

INFINITI QX56 2011 Factory Service Manual
B2454 SEAT BLT PWR DR CIRCSBC-41
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G
I
J
K L
M A
B
SBC
N
O P
B2454 SEAT BLT PWR DR CIRC
DTC LogicINFOID:0000000006237906
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE

Page 4339 of 5598

INFINITI QX56 2011 Factory Service Manual
SBC-42
< DTC/CIRCUIT DIAGNOSIS >
B2455 CONTROL UNIT DR
B2455 CONTROL UNIT DR
DTC LogicINFOID:0000000006237908
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.SELF-DIAGNOSIS WITH PRE-CRASH SEAT BELT

Page 4340 of 5598

INFINITI QX56 2011 Factory Service Manual
B2456 SEAT BLT PWR ASSBC-43
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G
I
J
K L
M A
B
SBC
N
O P
B2456 SEAT BLT PWR AS
DTC LogicINFOID:0000000006237910
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.SELF-DIA

Page 4341 of 5598

INFINITI QX56 2011 Factory Service Manual
SBC-44
< DTC/CIRCUIT DIAGNOSIS >
B2457 CONTROL UNIT AS
B2457 CONTROL UNIT AS
DTC LogicINFOID:0000000006237912
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.SELF-DIAGNOSIS WITH PRE-CRASH SEAT BELT

Page 4342 of 5598

INFINITI QX56 2011 Factory Service Manual
B2458 LOCAL COMMSBC-45
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G
I
J
K L
M A
B
SBC
N
O P
B2458 LOCAL COMM
DTC LogicINFOID:0000000006237914
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.SELF-DIAGNOSIS WIT

B2458 LOCAL COMMSBC-45
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G
I
J
K L
M A
B
SBC
N
O P
B2458 LOCAL COMM
DTC LogicINFOID:0000000006237914
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.SELF-DIAGNOSIS WITH PRE-CRASH SEAT BELT CONTROL UNIT
1. Turn ignition switch ON.
2. Check “Self-diagnostic result” with CONSULT-III.
Is DTC detected?
YES >> Refer to SBC-45, "Diagnosis Procedure".
NO >> INSPECTIN END
Diagnosis ProcedureINFOID:0000000006237915
1.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check pre-crash seat belt control unit power supply and ground circuit. Refer to SBC-43, "
Diagnosis Proce-
dure".
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair or replace malfunctioning parts.
2.CHECK LOCAL COMMUNICATION LINE CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect pre-crash seat belt control unit (driver side and passenger side) harness connector.
3. Check continuity between pre-crash seat belt cont rol unit (driver side) harness connector and pre-crash
seat belt control unit (passenger side).
4. Check continuity between pre-crash seat belt control unit (driver side) harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace harness or connector.
3.REPLACE PRE-CRASH SEAT BELT CONTROL UNIT (PASSENGER SIDE)
1. Replace pre-crash seat belt control unit (passenger side). Refer to SB-6, "
SEAT BELT RETRACTOR :
Removal and Installation".
2. Check “Self-diagnostic result” with CONSULT-III.
DTC No. Self-diagnosis item DTC Detection Condition Possible causes
B2458 LOCAL COMM Receipt of a malfunction signal between pre-
crash seat belt control unit (driver side) and
pre-crash seat belt control unit (passenger
side) Harness or connectors
[The pre-crash seat belt control unit (driver side)
and pre-crash seat belt (passenger side) circuit
is open or shorted]
Pre-crash seat belt control unit (driver side)
Pre-crash seat belt control (passenger side)
Pre-crash seat belt control unit (driver side) Pre -crash seat belt control unit (passenger side)
Continuity
Connector Terminal Connector Terminal
B9 8
B231 8
Existed
16 16
Pre-crash seat belt control unit (driver side) GroundContinuity
Connector Terminal
B9 8
Not existed
16
Revision: 2010 May2011 QX56

Page 4343 of 5598

INFINITI QX56 2011 Factory Service Manual
SBC-46
< DTC/CIRCUIT DIAGNOSIS >
B2458 LOCAL COMM
Is DTC detected?
YES >> GO TO 4.
NO >> INSPECTION END
4.REPLACE PRE-CRASH SEAT BELT CONTROL UNIT (DRIVER SIDE)
1. Replace pre-crash seat belt control

Page 4344 of 5598

INFINITI QX56 2011 Factory Service Manual
B2461 VHCL SPEED SIGNALSBC-47
< DTC/CIRCUIT DIAGNOSIS >
C
DE
F
G
I
J
K L
M A
B
SBC
N
O P
B2461 VHCL SPEED SIGNAL
DescriptionINFOID:0000000006237916
Inputs the vehicle speed signal from combination me

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