INFINITI QX56 2011 Factory Service Manual

INL-54
< BASIC INSPECTION >
DIAGNOSIS AND REPAIR WORKFLOW
BASIC INSPECTION
DIAGNOSIS AND REPAIR WORKFLOW
Work FlowINFOID:0000000006216064
OVERALL SEQUENCE
DETAILED FLOW
1.INTERVIEW FOR MALFUNCTION
Interview the symptom to the customer.
JPLIA0313GB
Revision: 2010 May2011 QX56

DIAGNOSIS AND REPAIR WORKFLOWINL-55
< BASIC INSPECTION >
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>> GO TO 2.
2.SYMPTOM CHECK
Check the symptom from the customer's information.
>> GO TO 3.
3.BASIC INSPECTION
Check the operation of each part. Check that any sy mptom occurs other than the interviewed symptom.
>> GO TO 4.
4.SELF-DIAGNOSIS WITH CONSULT-III
Perform the self-diagnosis with CONSULT- III. Check that any DTC is detected.
Is any DTC detected?
YES >> GO TO 5.
NO >> GO TO 6.
5.TROUBLE DIAGNOSIS BY DTC
Perform the trouble diagnosis for the detect ed DTC. Specify the malfunctioning part.
>> GO TO 9.
6.FAIL-SAFE ACTIVATION CHECK
Check that the symptom is appli ed to the fail-safe activation.
Does the fail-safe activate?
YES >> GO TO 7.
NO >> GO TO 8.
7.SYSTEM DIAGNOSIS
Perform the system diagnosis for the system that the fail-safe activates. Specify the malfunctioning part.
>> GO TO 9.
8.SYMPTOM DIAGNOSIS
Perform the symptom diagnosis. Specify the malfunctioning part.
>> GO TO 9.
9.MALFUNCTION PART REPAIR
Repair or replace the malfunctioning part.
>> GO TO 10.
10.REPAIR CHECK (SELF-DIAGNOSIS WITH CONSULT-III)
Perform the self-diagnosis with CONSULT-III. Check t hat any DTC is not detected. Erase DTC if DTC is
detected before the repair. Check that DTC is not detected again.
Is any DTC detected?
YES >> GO TO 5.
NO >> GO TO 11.
11 .REPAIR CHECK (OPERATION CHECK)
Check the operation of each part.
Does it operate normally?
YES >> INSPECTION END
NO >> GO TO 3.
Revision: 2010 May2011 QX56

INL-56
< DTC/CIRCUIT DIAGNOSIS >
INTERIOR ROOM LAMP POWER SUPPLY CIRCUIT
DTC/CIRCUIT DIAGNOSIS
INTERIOR ROOM LAMP PO WER SUPPLY CIRCUIT
DescriptionINFOID:0000000006216065
Provides the interior room lamp power supply. Also cu ts the power supply when the interior room lamp battery
saver activating.
Component Function CheckINFOID:0000000006216066
1.CHECK INTERIOR ROOM LAMP POWER SUPPLY FUNCTION
CONSULT-III ACTIVE TEST
1. Turn ignition switch ON.
2. Turn each interior room lamp ON.
- Personal lamp
- Map lamp
- Foot lamp
- Luggage room lamp
- Automatic back door close switch illumination
- Step lamp
- Puddle lamp
- Vanity mirror lamp
3. Select “BATTERY SAVER” of BCM (BATTERY SAVER) active test item.
4. With operating the test items, check t hat each interior room lamp turns ON/OFF.
Does the interior room lamp turn ON/OFF?
YES >> Interior room lamp power supply circuit is normal.
NO >> Refer to INL-56, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006216067
1.CHECK INTERIOR ROOM LAMP POWER SUPPLY OUTPUT
CONSULT-III ACTIVE TEST
1. Turn ignition switch OFF.
2. Disconnect the following connectors.
- Personal lamp
- Map lamp
- Foot lamp (both sides)
- Luggage room lamp
- Automatic back door close switch illumination
- Step lamp (ALL)
- Puddle lamp (both sides)
- Vanity mirror lamp (both sides)
3. Turn ignition switch ON.
4. Select “BATTERY SAVER” of BCM (BATTERY SAVER) active test item.
5. With operating the test item, check voltage between BCM harness connector and ground.
Is the inspection result normal?
Off : Interior room lamp OFF
On : Interior room lamp ON
BCM (–) Test item Vo l ta g e
(Approx.)
(+)
Connector Terminal
M70 56 Ground BATTERY SAVER Off 0 V
On 12 V
Revision: 2010 May2011 QX56

INTERIOR ROOM LAMP POWER SUPPLY CIRCUIT
INL-57
< DTC/CIRCUIT DIAGNOSIS >
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YES >> GO TO 2.
NO >> GO TO 3.
2.CHECK INTERIOR ROOM LAMP POWER SUPPLY OPEN CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect the BCM connector.
3. Check continuity between BCM harness connector and each interior room lamp harness connector.
Is the inspection result normal?
YES >> Check for internal short circuit of each interior room lamp.
NO >> Repair or replace harnesses.
3.CHECK INTERIOR ROOM LAMP POWER SUPPLY SHORT CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect the BCM connector.
3. Check continuity between BCM harness connector and ground.
Is the inspection result normal?
YES >> Replace BCM. Refer to BCS-81, "Removal and Installation".
NO >> Repair or replace harnesses.
BCM Each interior room lamp Continuity
Connector Terminal Connector Terminal
M70 56 Personal lamp R21 3
Existed
Map lamp R18 8
Foot lamp
(driver side)
M89 1
Foot lamp
(passenger side) M90 2
Luggage room lamp B11 2
Automatic back door close switch D158 3
Ste p l am p
(driver side) D8 1
Ste p l am p
(passenger side) D29 1
Ste p l am p
(Rear LH) D66 1
Ste p l am p
(Rear RH) D46 1
Puddle lamp
(driver side) D3 2
Puddle lamp
(passenger side) D23 2
Vanity mirror lamp (driver side) R12 2
Vanity mirror la mp (passenger
side) R13 2
Foot lamp
(Rear LH) B479 65
Foot lamp
(Rear RH) B480 65
BCM
GroundContinuity
Connector Terminal
M70 56 Not existed
Revision: 2010 May2011 QX56

INL-58
< DTC/CIRCUIT DIAGNOSIS >
INTERIOR ROOM LAMP CONTROL CIRCUIT
INTERIOR ROOM LAMP CONTROL CIRCUIT
DescriptionINFOID:0000000006216068
Controls each interior room lamp (ground side) by PWM signal.
NOTE:
PWM signal control period is approximately 250 Hz (in the gradual brightening/dimming).
Component Function CheckINFOID:0000000006216069
CAUTION:
Before performing the diagnosis, check that the following are normal.
 Interior room lamp power supply
 Map lamp bulb
 Personal lamp bulb
 Foot lamp bulb
1.CHECK INTERIOR ROOM LAMP CONTROL FUNCTION
CONSULT-III ACTIVE TEST
1. Switch the map lamp switch and personal lamp switch to DOOR.
2. Turn ignition switch ON.
3. Select “INT LAMP” of BCM (INT LAMP) active test item.
4. With operating the test items, c heck that each interior room lamp turns ON/OFF (gradual brightening/dim-
ming).
Does the interior room lamp turns ON/OFF (gradual brightening/dimming)?
YES >> Interior room lamp control circuit is normal.
NO >> Refer to INL-58, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006216070
1.CHECK INTERIOR ROOM LAMP CONTROL OUTPUT
CONSULT-III ACTIVE TEST
1. Switch the map lamp switch and personal lamp switch to DOOR.
2. Turn ignition switch OFF.
3. Remove all the bulbs of map lamp, foot lamp and personal lamp.
4. Turn ignition switch ON.
5. Select “INT LAMP” of BCM (INT LAMP) active test item.
6. With operating the test item, check c ontinuity between BCM harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
Fixed ON>>GO TO 3.
Fixed OFF>>Replace BCM. Refer to BCS-81, "
Removal and Installation".
2.CHECK INTERIOR ROOM LAMP CONTROL OPEN CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector, map lamp connector, personal lamp connector and foot lamp connector.
3. Check continuity between BCM harness connector and foot lamp harness connector.
On : Interior room lamp gradual brightening
Off : Interior room lamp gradual dimming
BCM
Ground Test item Continuity
Connector Terminal
M70 63 INT LAMP On Existed
Off Not existed
Revision: 2010 May2011 QX56

INTERIOR ROOM LAMP CONTROL CIRCUITINL-59
< DTC/CIRCUIT DIAGNOSIS >
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4. Check continuity between BCM harness connector and map lamp harness connector.
5. Check continuity between personal lamp harness connector and map lamp harness connector.
Is the inspection result normal?
YES >> Replace map lamp, personal lamp or foot lamp.
NO >> Repair or replace harnesses.
3.CHECK INTERIOR ROOM LAMP CONTROL SHORT CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector, map lamp connector, personal lamp connector and foot lamp connector.
3. Check continuity between BCM harness connector and ground.
4. Check continuity between personal lamp harness connector and ground.
Is the inspection result normal?
YES >> Replace BCM. Refer to BCS-81, "Removal and Installation".
NO >> Repair or replace harnesses.
BCM Foot lamp Continuity
Connector Terminal Connector Terminal
M70 63 Driver side M89 2
Existed
Passenger side M90 1
Rear LH B479
66
Rear RH B480
BCM Map lamp Continuity
Connector Terminal Connector Terminal
M70 63 R18 7 Existed
Personal lamp Map lamp Continuity
Connector Terminal Connector Terminal
R212R185Existed
BCM GroundContinuity
Connector Terminal
M70 63 Not existed
Personal lamp GroundContinuity
Connector Terminal
R21 2 Not existed
Revision: 2010 May2011 QX56

INL-60
< DTC/CIRCUIT DIAGNOSIS >
LUGGAGE ROOM LAMP CIRCUIT
LUGGAGE ROOM LAMP CIRCUIT
DescriptionINFOID:0000000006216071
Controls the luggage room lamp and automatic back door close switch illumination (ground side) to turn the
luggage room lamp and automatic back door close switch illumination ON and OFF.
Diagnosis ProcedureINFOID:0000000006216072
CAUTION:
Before performing the diagnosis, check that the following are normal.
 Interior room lamp power supply
 Luggage room lamp bulb
1.CHECK LUGGAGE ROOM LAMP OUTPUT
1. Turn ignition switch OFF.
2. Remove the luggage room bulb.
3. Disconnect automatic back door close switch connector.
4. Check continuity between BCM harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
Fixed ON>>GO TO 3.
Fixed OFF>>Replace BCM. Refer to BCS-81, "
Removal and Installation".
2.CHECK LUGGAGE ROOM LAMP OPEN CIRCUIT
1. Disconnect BCM connector.
2. Check continuity between BCM harness c onnector and luggage room lamp harness connector.
3. Check continuity between BCM harness connector and automatic back door close switch harness con-
nector.
Is the inspection result normal?
YES >> Replace luggage room lamp or automatic back door close switch.
NO >> Repair or replace harnesses.
3.CHECK LUGGAGE ROOM LAMP SHORT CIRCUIT
1. Disconnect BCM connector.
2. Check continuity between BCM harness connector and ground.
Is the inspection result normal?
YES >> Replace BCM. Refer to BCS-81, "Removal and Installation".
BCM
Ground Condition Continuity
Connector Terminal
M69 49 Back door Open Existed
Closed Not existed
BCM Luggage room lamp Continuity
Connector Terminal Connector Terminal
M69 49 B11 1 Existed
BCM Automatic back door close switch Continuity
Connector Terminal Connector Terminal
M69 49 D158 4 Existed
BCM GroundContinuity
Connector Terminal
M69 49 Not existed
Revision: 2010 May2011 QX56

LUGGAGE ROOM LAMP CIRCUITINL-61
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NO >> Repair or replace harnesses.
Revision: 2010 May2011 QX56

INL-62
< DTC/CIRCUIT DIAGNOSIS >
STEP LAMP CIRCUIT
STEP LAMP CIRCUIT
DescriptionINFOID:0000000006216073
Controls the step lamp (ground side) to turn the step lamp ON and OFF.
Component Function CheckINFOID:0000000006216074
CAUTION:
Before performing the diagnosis, check that the following is normal.
 Interior room lamp power supply
 Step lamp bulb
1.CHECK STEP LAMP OPERATION
CONSULT-III ACTIVE TEST
1. Turn ignition switch ON.
2. Select “STEP LAMP TEST” of BCM (INT LAMP) active test item.
3. With operating the test items, c heck that step lamp turns ON/OFF.
Does the step lamp turn ON/OFF?
YES >> Step lamp circuit is normal.
NO >> Refer to INL-62, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006216075
1.CHECK STEP LAMP OUTPUT
CONSULT-III ACTIVE TEST
1. Turn ignition switch OFF.
2. Remove the step lamp bulbs (ALL).
3. Turn ignition switch ON.
4. Select “STEP LAMP TEST” of BCM (INT LAMP) active test item.
5. With operating the test item, check c ontinuity between BCM harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
Fixed ON>>GO TO 3.
Fixed OFF>>Replace BCM. Refer to BCS-81, "
Removal and Installation".
2.CHECK STEP LAMP OPEN CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector, and step lamp connector.
3. Check continuity between BCM harness connector and step lamp harness connector.
On : Step lamp ON
Off : Step lamp OFF
BCM
Ground Test item Continuity
Connector Terminal
M70 62 STEP LAMP TEST On Existed
Off Not existed
BCM Step lamp Continuity
Connector Terminal Connector Terminal
M70 62 Driver side D8
2 Existed
Passenger side D29
Rear LH D66
Rear RH D46
Revision: 2010 May2011 QX56

STEP LAMP CIRCUITINL-63
< DTC/CIRCUIT DIAGNOSIS >
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Is the inspection result normal?
YES >> Replace step lamp.
NO >> Repair or replace harnesses.
3.CHECK STEP LAMP SHORT CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between BCM harness connector and ground.
Is the inspection result normal?
YES >> Repair or replace harnesses.
NO >> Replace BCM. Refer to BCS-81, "
Removal and Installation".
BCM
GroundContinuity
Connector Terminal
M70 62 Not existed
Revision: 2010 May2011 QX56