INFINITI QX56 2011 Factory Service Manual

WCS
DIAGNOSIS AND REPAIR WORKFLOWWCS-37
< BASIC INSPECTION >
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BASIC INSPECTION
DIAGNOSIS AND REPAIR WORKFLOW
Work FlowINFOID:0000000006222526
OVERALL SEQUENCE
DETAILED FLOW
1.OBTAIN INFORMATION ABOUT SYMPTOM
Interview the customer to obtain as much informa tion as possible about the conditions and environment under
which the malfunction occurred.
>> GO TO 2.
2.CHECK SYMPTOM
 Check the symptom based on the information obtained from the customer.
 Check if any other ma lfunctions are present.
>> GO TO 3.
3.CHECK CONSULT-III SELF -DIAGNOSIS RESULTS
Connect CONSULT-III and perform self-diagnosis. Refer to MWI-43, "
DTC Index".
JSNIA0733GB
Revision: 2010 May2011 QX56

WCS-38
< BASIC INSPECTION >
DIAGNOSIS AND REPAIR WORKFLOW
Are self-diagnosis results normal?
YES >> GO TO 4.
NO >> GO TO 5.
4.NARROW DOWN MALFUNCTIONING PARTS BY SYMPTOM DIAGNOSIS
Perform symptom diagnosis and narrow down the malfunctioning parts.
>> GO TO 5.
5.REPAIR OR REPLACE MALFUNCTIONING PARTS
Repair or replace malfunctioning parts.
NOTE:
If DTC is displayed, erase DTC after repairing or replacing malfunctioning parts.
>> GO TO 6.
6.FINAL CHECK
Check that the warning buzzer in the combination meter operates normally.
Does it operate normally?
YES >> INSPECTION END
NO >> GO TO 1.
Revision: 2010 May2011 QX56

WCS
POWER SUPPLY AND GROUND CIRCUITWCS-39
< DTC/CIRCUIT DIAGNOSIS >
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DTC/CIRCUIT DIAGNOSIS
POWER SUPPLY AND GROUND CIRCUIT
COMBINATION METER
COMBINATION METER : Diagnosis ProcedureINFOID:0000000006222743
1.CHECK FUSE
Check for blown fuses.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Be sure to eliminate cause of malfunction before installing new fuse.
2.CHECK POWER SUPPLY CIRCUIT
Check voltage between combination meter harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Check harness between combination meter and fuse.
3.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect combination meter connector.
3. Check continuity between combination meter harness connector and ground.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair harness or connector.
Power source Fuse No.
Battery 11
Ignition switch ON or START 3
Te r m i n a l s
Ignition switch po-sition Vo l ta g e
(Approx.)
(+) (
−)
Combination meter
Ground
Connector Terminal
M34 1OFF
Battery voltage
2ON
Combination meter
GroundContinuity
Connector Terminal
M34 3
Existed
23
Revision: 2010 May2011 QX56

WCS-40
< DTC/CIRCUIT DIAGNOSIS >
METER BUZZER CIRCUIT
METER BUZZER CIRCUIT
Component Function CheckINFOID:0000000006222528
1.CHECK OPERATION OF METER BUZZER
1. Select “BUZZER” of “BCM” on CONSULT-III.
2. Perform “LIGHT WARN ALM” of “Active Test”.
Does meter buzzer beep?
YES >> INSPECTION END
NO >> GO TO 2.
2.CHECK COMBINATION METER INPUT SIGNAL
Select the “Data Monitor” for the “METER/M&A” and check the “BUZZER” monitor value.
Is the inspection result normal?
YES >> Replace combination meter.
NO >> Replace BCM. Refer to BCS-81, "
Removal and Installation".
Diagnosis ProcedureINFOID:0000000006222529
1.CHECK POWER SUPPLY OF COMBINATION METER
Check power supply of combination meter. Refer to MWI-64, "
COMBINATION METER : Diagnosis Proce-
dure".
Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair power supply circuit of combination meter.
BUZZER
Under the condition of buzzer input : On
Except above : Off
Revision: 2010 May2011 QX56

WCS
SEAT BELT BUCKLE SWITCH SIGNAL CIRCUIT
WCS-41
< DTC/CIRCUIT DIAGNOSIS >
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SEAT BELT BUCKLE SWITCH SIGNAL CIRCUIT
Component Function CheckINFOID:0000000006222691
1.CHECK COMBINATION METER INPUT SIGNAL
Select the “Data Monitor” for the “METER/M& A” and check the “BUCKLE SW” monitor value.
>> INSPECTION END
Diagnosis ProcedureINFOID:0000000006222692
1.CHECK COMBINATION METER INPUT SIGNAL
1. Turn ignition switch ON.
2. Check voltage between combination meter harness connector and ground.
Is the inspection result normal?
YES >> Replace combination meter. Refer to MWI-85, "Removal and Installation".
NO >> GO TO 2.
2.CHECK SEAT BELT BUCKLE SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect combination meter connector and seat belt buckle switch (driver side) connector.
3. Check continuity between combination meter harnes s connector and seat belt buckle switch (driver side)
harness connector.
4. Check harness continuity between comb ination meter harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK SEAT BELT BUCKLE SWITCH GROUND CIRCUIT
Check harness continuity between seat belt buckle switch (driver side) harness connector and ground.
BUCKLE SW
When seat belt is fastened : Off
When seat belt is unfastened : On
Te r m i n a l s ConditionVol tag e
(Approx.)
(+) (-)
Combination meter
Ground
Connector Terminal
M34 35 When driver seat belt is fastened 12 V
When driver seat belt is unfastened 0 V
Combination meter Seat belt buckle switch (driver side)
Continuity
Connector Terminal Connector Terminal
M34 35 B76 3 Existed
Combination meter GroundContinuity
Connector Terminal
M34 35 Not existed
Revision: 2010 May2011 QX56

WCS-42
< DTC/CIRCUIT DIAGNOSIS >
SEAT BELT BUCKLE SWITCH SIGNAL CIRCUIT
Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair harness or connector.
Component InspectionINFOID:0000000006222693
1.CHECK SEAT BELT BUCKLE SWITCH (DRIVER SIDE)
1. Turn ignition switch OFF.
2. Disconnect the seat belt buckle switch (driver side) connector.
3. Check continuity between terminals.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace seat belt buckle (driver side). Refer to SB-8, "
SEAT BELT BUCKLE : Removal and Instal-
lation".
Seat belt buckle switch (driver side)
GroundContinuity
Connector Terminal
B76 4 Existed
Terminal Condition Continuity
34 When seat belt is fastened Not existed
When seat belt is unfastened Existed
Revision: 2010 May2011 QX56

WCS
PARKING BRAKE SWITCH SIGNAL CIRCUITWCS-43
< DTC/CIRCUIT DIAGNOSIS >
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PARKING BRAKE SWITCH SIGNAL CIRCUIT
Diagnosis ProcedureINFOID:0000000006222530
1.CHECK COMBINATION METER INPUT SIGNAL
1. Turn ignition switch ON.
2. Check the voltage between combination meter harness connector and ground.
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 2.
2.CHECK PARKING BRAKE SWITCH SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect combination meter connecto r and parking brake switch connector.
3. Check continuity between combination meter har ness connector and parking brake switch harness con-
nector.
4. Check continuity between combination meter harness connector and ground.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair harness or connector.
Component InspectionINFOID:0000000006222531
1.CHECK PARKING BRAKE SWITCH
Check parking brake switch. Refer to BRC-118, "
Component Inspection".
Is the inspection result normal?
YES >> INSPECTION END.
NO >> Replace parking brake switch. Refer to PB-5, "
Exploded View".
(+) (−)
Condition Vo l ta g e
(Approx.)
Combination meter
Ground
Connector Terminal
M34 26 Ignition
switch ONWhen parking brake is applied 0 V
When parking brake is released 12 V
Te r m i n a l s
Continuity
Combination meter Parking brake switch
Connector Terminal Connector Terminal M34 26 M11 1 Existed
Te r m i n a l s Continuity
Combination meter
Ground
Connector Terminal
M34 26 Not existed
Revision: 2010 May2011 QX56

WCS-44
< SYMPTOM DIAGNOSIS >
THE LIGHT REMINDER WARNING DOES NOT SOUND
SYMPTOM DIAGNOSIS
THE LIGHT REMINDER WARNING DOES NOT SOUND
DescriptionINFOID:0000000006222532
Light reminder warning chime does not sound even though headlamp is illuminated.
Diagnosis ProcedureINFOID:0000000006222533
1.CHECK COMBINATION SWITCH (LIGHTING SWITCH) OPERATION
Check that the headlamps operate normally by operat ing the combination switch (lighting switch).
Do they operate normally?
YES >> GO TO 2.
NO >> Refer to EXL-113, "
Symptom Table".
2.CHECK DRIVER SIDE DOOR SWITCH SIGNAL CIRCUIT
Perform the check for the driver side door switch signal circuit. Refer to DLK-117, "
Diagnosis Procedure".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK DRIVER SIDE DOOR SWITCH
Perform a unit check for the driver side door switch. Refer to DLK-119, "
Component Inspection".
Is the inspection result normal?
YES >> Replace BCM. Refer to BCS-81, "Removal and Installation".
NO >> Replace driver side door switch. Refer to DLK-254, "
Removal and Installation".
Revision: 2010 May2011 QX56

WCS
THE SEAT BELT WARNING CONTINUES SOUNDING, OR DOES NOT SOUND
WCS-45
< SYMPTOM DIAGNOSIS >
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THE SEAT BELT WARNING CONTIN UES SOUNDING, OR DOES NOT
SOUND
DescriptionINFOID:0000000006222694
 Seat belt warning chime does not sound.
 Seat belt warning chime sounds continuously.
Diagnosis ProcedureINFOID:0000000006222695
1.CHECK SEAT BELT WARNING LAMP
1. Turn ignition switch ON.
2. Check the operation of the seat belt warning lamp in the combination meter.
Is the inspection result normal?
YES >> GO TO 2.
NO >> GO TO 4.
2.CHECK BCM OUTPUT SIGNAL
Check if the seat belt warning chime is acti vated by performing BCM active test. Refer to WCS-20, "
BUZZER :
CONSULT-III Function (BCM - BUZZER)".
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 3.
3.CHECK COMBINATION METER INPUT SIGNAL
Check if buzzer switches to proper condition (On/Off) on data monitor of combination meter. Refer to WCS-14,
"CONSULT-III Function".
Is the inspection result normal?
YES >> Replace combination meter. Refer to MWI-85, "Removal and Installation".
NO >> Replace BCM. Refer to BCS-81, "
Removal and Installation".
4.CHECK SEAT BELT BUCKLE SWITCH (DRIVER SIDE) CIRCUIT
Perform the check for the seat belt buckle switch (driver side) circuit. Refer to WCS-41,
"DiagnosisProcedure".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair harness or connector.
5.CHECK SEAT BELT BUCKLE SWITCH (DRIVER SIDE)
Perform a unit check for the seat belt buckle switch (driver side). Refer to WCS-42, "
Component Inspection".
Is the inspection result normal?
YES >> Replace combination meter. Refer to MWI-85, "Removal and Installation".
NO >> Replace seat belt buckle (driver side). Refer to SB-8, "
SEAT BELT BUCKLE : Removal and Instal-
lation".
Seat belt fastened : OFF
Seat belt not fastened : ON
Buzzer active condition : On
Buzzer non-active condition : Off
Revision: 2010 May2011 QX56

WCS-46
< SYMPTOM DIAGNOSIS >
THE PARKING BRAKE RELEASE WARNING CONTINUES SOUNDING, OR
DOES NOT SOUND
THE PARKING BRAKE RELEASE WARNING CONTINUES SOUNDING, OR
DOES NOT SOUND
DescriptionINFOID:0000000006222534
 The parking brake warning buzzer sounds continuously during vehicle travel though the parking brake is
released.
 The parking brake warning buzzer does not sound at a ll even though driving the vehicle with the parking
brake applied.
Diagnosis ProcedureINFOID:0000000006222535
1.CHECK PARKING BRAKE WARNING LAMP
1. Start the engine.
2. Check the operation of the brake warni ng lamp by operating the parking brake.
Is the inspection result normal?
YES >> Replace combination meter. Refer to MWI-85, "Removal and Installation"
NO >> GO TO 2.
2.CHECK PARKING BRAKE SWITCH SIGNAL CIRCUIT
Perform check for the parking brake switch signal circuit. Refer to WCS-43, "
Diagnosis Procedure".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK PARKING BRAKE SWITCH
Perform a unit check for the parking brake switch. Refer to WCS-43, "
Component Inspection".
Is the inspection result normal?
YES >> Replace combination meter. Refer to MWI-85, "Removal and Installation"
NO >> Replace parking brake switch. Refer to PB-5, "Exploded View".
When parking brake is applied : ON
When parking brake is released : OFF
Revision: 2010 May2011 QX56