Infiniti QX56 (Z62). Manual — part 1085
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"
.
Brake pedal stroke sensor
Condition
Resistance (k
Ω
)
(Approx.)
Terminal
2
1
Brake released
→
depressed
1.0
→
0.2
3
0.2
→
1.0
B2454 SEAT BLT PWR DR CIRC
SBC-41
< DTC/CIRCUIT DIAGNOSIS >
C
D
E
F
G
I
J
K
L
M
A
B
SBC
N
O
P
B2454 SEAT BLT PWR DR CIRC
DTC Logic
INFOID:0000000006237906
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
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000006237907
1.
CHECK FUSE
1.
Turn ignition switch OFF.
2.
Check 30 A fuse (No. 83).
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace the blown fuse after repairing the affected circuit if a fuse is blown.
2.
CHECK PRE-CRASH SEAT BELT MOTOR POWER SUPPLY
1.
Disconnect pre-crash seat belt control unit (driver side) harness connector.
2.
Check voltage 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.
CHECK INTERMITTENT INCIDENT
GI-40, "Intermittent Incident"
.
>> INSPECTION END
DTC No.
Self-diagnosis item
DTC Detection Condition
Possible causes
B2454
SEAT BLT PWR DR CIRC
Seat belt motor (driver side) power supply cir-
cuit is open or shorted
• Harness or connectors
[Pre-crash seat belt control unit (driver
side) circuit is open or shorted]
• Pre-crash seat belt control unit (driver side)
Pre-crash seat belt control unit (driver side)
Ground
Voltage (V)
Connector
Terminal
Battery voltage
B9
19
SBC-42
< DTC/CIRCUIT DIAGNOSIS >
B2455 CONTROL UNIT DR
B2455 CONTROL UNIT DR
DTC Logic
INFOID:0000000006237908
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
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000006237909
1.
.INSPECTION START
1.
Check “Self-diagnostic result” with CONSULT-III.
2.
Touch “ERASE”.
3.
Perform DTC Confirmation Procedure.
See
.
Is DTC B2455 displayed again?
YES
>> Replace pre-crash seat belt control unit (driver side).
NO
>> GO TO 2.
2.
CHECK INTERMITTENT INCIDENT
GI-40, "Intermittent Incident"
>> INSPECTION END
DTC No.
Self-diagnosis item
DTC Detection Condition
Possible causes
B2455
CONTROL UNIT DR
Pre-crash seat belt control unit (driver side) inter-
nal circuit malfunction
Pre-crash seat belt control unit (driver side)
B2456 SEAT BLT PWR AS
SBC-43
< DTC/CIRCUIT DIAGNOSIS >
C
D
E
F
G
I
J
K
L
M
A
B
SBC
N
O
P
B2456 SEAT BLT PWR AS
DTC Logic
INFOID:0000000006237910
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
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000006237911
1.
CHECK FUSE AND FUSIBLE LINK
1.
Turn ignition switch OFF.
2.
Check 30 A fuse (No.77).
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace the blown fuse after repairing the affected circuit if a fuse is blown.
2.
CHECK PRE-CRASH SEAT BELT MOTOR POWER SUPPLY
1.
Disconnect pre-crash seat belt control unit (passenger side) harness connector.
2.
Check voltage between pre-crash seat belt control unit (passenger side) harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace harness between pre-crash seat belt control unit (passenger side) and fuse.
3.
CHECK INTERMITTENT INCIDENT
GI-40, "Intermittent Incident"
.
>> INSPECTION END
DTC No.
Self-diagnosis item
DTC Detection Condition
Possible causes
B2456
SEAT BLT PWR AS
CIRC
Pre-crash seat belt control unit (passenger side)
power supply circuit is open or shorted
• Harness or connectors
[Pre-crash seat belt control unit (pas-
senger side) circuit is open or shorted]
• Pre-crash seat belt control unit (pas-
senger side)
Pre-crash seat belt control unit (passenger side)
Ground
Voltage (V)
(Approx.)
Connector
Terminal
Battery voltage
B231
19
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