Infiniti QX56 (Z62). Manual — part 1086
SBC-44
< DTC/CIRCUIT DIAGNOSIS >
B2457 CONTROL UNIT AS
B2457 CONTROL UNIT AS
DTC Logic
INFOID:0000000006237912
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:0000000006237913
1.
.INSPECTION START
1.
Check “Self-diagnostic result” with CONSULT-III.
2.
Touch “ERASE”.
3.
Perform DTC Confirmation Procedure.
See
.
Is DTC B2457 displayed again?
YES
>> Replace pre-crash seat belt control unit (passenger 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
B2457
CONTROL UNIT AS
Pre-crash seat belt control unit (passenger side) in-
ternal circuit malfunction
Pre-crash seat belt control unit (passenger
side)
B2458 LOCAL COMM
SBC-45
< DTC/CIRCUIT DIAGNOSIS >
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B2458 LOCAL COMM
DTC Logic
INFOID: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
NO
>> INSPECTIN END
Diagnosis Procedure
INFOID:0000000006237915
1.
CHECK POWER SUPPLY AND GROUND CIRCUIT
Check pre-crash seat belt control unit power supply and ground circuit. Refer to
.
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 control 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
.
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)
Ground
Continuity
Connector
Terminal
B9
8
Not existed
16
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 unit (driver side). Refer to
.
2.
Check “Self-diagnostic result” with CONSULT-III.
Is DTC detected?
YES
>> GO TO 5.
NO
>> INSPECTION END
5.
CHECK INTERMITTENT INCIDENT
GI-40, "Intermittent Incident"
>> INSPECTION END
B2461 VHCL SPEED SIGNAL
SBC-47
< DTC/CIRCUIT DIAGNOSIS >
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B2461 VHCL SPEED SIGNAL
Description
INFOID:0000000006237916
Inputs the vehicle speed signal from combination meter via CAN communication.
DTC Logic
INFOID:0000000006237917
DTC DETECTION LOGIC
NOTE:
If DTC B2461 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
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:0000000006237918
1.
CHECK COMBINATION METER
Check combination meter. Refer to
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace malfunctioning parts.
2.
CHECK INTERMITTENT INCIDENT
GI-40, "Intermittent Incident"
.
>> INSPECTION END
DTC No.
Self-diagnosis item
DTC Detection Condition
Possible causes
B2461
VHCL SPEED SIGNAL
Receipt of a malfunction signal of the vehicle speed signal
Combination meter
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