INFINITI QX56 2011 Factory Service Manual

SBC-24
< WIRING DIAGRAM >
PRE-CRASH SEAT BELT SYSTEM
JCHWM0719GB
Revision: 2010 May2011 QX56

PRE-CRASH SEAT BELT SYSTEMSBC-25
< WIRING DIAGRAM >
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JCHWM0720GB
Revision: 2010 May2011 QX56

SBC-26
< WIRING DIAGRAM >
SEAT BELT WARNING SYSTEM
SEAT BELT WARNING SYSTEM
Wiring DiagramINFOID:0000000006237889
JCHWM0721GB
Revision: 2010 May2011 QX56

SEAT BELT WARNING SYSTEMSBC-27
< WIRING DIAGRAM >
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JCHWM0722GB
Revision: 2010 May2011 QX56

SBC-28
< WIRING DIAGRAM >
SEAT BELT WARNING SYSTEM
JCHWM0723GB
Revision: 2010 May2011 QX56

SEAT BELT WARNING SYSTEMSBC-29
< WIRING DIAGRAM >
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JCHWM0724GB
Revision: 2010 May2011 QX56

SBC-30
< WIRING DIAGRAM >
SEAT BELT WARNING SYSTEM
JCHWM0725GB
Revision: 2010 May2011 QX56

DIAGNOSIS AND REPAIR WORKFLOWSBC-31
< BASIC INSPECTION >
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BASIC INSPECTION
DIAGNOSIS AND REPAIR WORKFLOW
Work FlowINFOID:0000000006237890
1.GET INFORMATION FOR SYSTEM
Interview the customer to obtain the malfunction information (conditions and environment when the malfunc-
tion occurred) as much as possible when the customer brings the vehicles in.
>> GO TO 2.
JMHIA1405GB
Revision: 2010 May2011 QX56

SBC-32
< BASIC INSPECTION >
DIAGNOSIS AND REPAIR WORKFLOW
2.STUDY AND UNDERSTAND THE SYSTEM DESCRIPTION
Understand the operation condition or non-operation c ondition of pre-crash seat belt. Refer to SBC-7, "
PRE-
CRASH SEAT BELT SYSTEM : System Description".
>> GO TO 3.
3.CHECK DTC
Perform “Self-diagnosis procedure” of appropria te DTC to check if DTC is detected again.
At this time, always connect CONSULT-III to the vehicl e, and then check the diagnosis results in real time on
“DATA MONITOR (AUTO RECORD)”.
There is no priority for each DTC. Record them based on the following rules.
Current malfunction: Record all DTCs detected.
Past malfunction: Record up to 5 DTCs . When the 6th DTC is detected, it is overwritten to the first recorded
DTC.
Is DTC detected?
YES >> GO TO 4.
NO >> GO TO 5.
4.PERFORM DTC CONFIRMATION PROCEDURE
Perform the inspection with “DTC REPRO DUCTION PROCEDURE” of the applicable system.
YES >> GO TO 6.
NO >> Check intermittent incident.Refer to GI-40, "
Intermittent Incident".
5.DETECT MALFUNCTIONING SYSTEM BY SYMPTOM DIAGNOSIS
Detect malfunctioning system according to SYMPTOM DIAGNOSIS based on the confirmed symptom in step
3, and determine the trouble diagnosis order based on possible causes and symptom.
>> GO TO 6.
6.DETECT MALFUNCTIONING PART BY DIAGNOSTIC PROCEDURE
Identify the malfunctioning part with “Diagnosis Procedure”.
>> GO TO 7.
7.REPAIR OR REPLACE THE MALFUNCTIONING PART
Repair or replace the specified malfunctioning parts.
>> GO TO 8.
8.FINAL CHECK
Perform “CONSULT-III function” again to chec k that the repair is performed correctly.
Check that malfunctions are not reproduced when obtaini ng the malfunction information from the customer,
referring to the symptom inspection result in step 3.
Are all malfunctions corrected?
YES >> INSPECTION END
NO-1 >> DTC is detected: GO TO 4.
NO-2 >> Symptom remains: GO TO 5.
Revision: 2010 May2011 QX56

U0126 ST ANG SEN SIGSBC-33
< DTC/CIRCUIT DIAGNOSIS >
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DTC/CIRCUIT DIAGNOSIS
U0126 ST ANG SEN SIG
DescriptionINFOID:0000000006237891
Inputs the steering angle signal from steering angle sensor via CAN communication.
DTC LogicINFOID:0000000006237892
DTC DETECTION LOGIC
NOTE:
If DTC U0126 is displayed with DTC U1000, first per form the trouble diagnosis for DTC U1000. Refer to SBC-
35, "DTC 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-33, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006237893
1.CHECK DTC WITH “ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)”
Check “Self-diagnostic result” for “ABS” with CONSULT-III. Refer to BRC-40, "
CONSULT-III Function".
Is DTC detected?
YES >> Repair or replace malfunctioning parts.
NO >> GO TO 2.
2.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
>> INSPECTION END
DTC No. Self-diagnosis item DTC Detection Condition Possible causes
U0126 ST ANG SEN SIG Receipt of a malfunction signal of Steering angle signal Steering angle sensor
Revision: 2010 May2011 QX56