ignition INFINITI QX56 2009 Factory Service Manual

INL-12
< FUNCTION DIAGNOSIS >
DIAGNOSIS SYSTEM (BCM)
INT LAMP : CONSULT-III Fu nction (BCM - INT LAMP)
INFOID:0000000004109548
WORK SUPPORT
* : Initial setting
DATA MONITOR
JPLIA0093GB
Work ItemSetting item Setting
SET I/L D-UNLCK INTCON ON* With the interior room lamp timer function
OFF Without the interior room lamp timer function
ROOM LAMP ON TIME SET MODE 1 0.5 sec.
Sets the interior room lamp gradual brightening time.
MODE 2* 1 sec.
MODE 3 2 sec.
MODE 4 3 sec.
MODE 5 0 sec.
ROOM LAMP OFF TIME SET MODE 1 0.5 sec.
Sets the interior room lamp gradual dimming time.
MODE 2 1 sec.
MODE 3 2 sec.
MODE 4* 3 sec.
MODE 5 0 sec.
Monitor Item
[Unit] Description
IGN ON SW [ON/OFF] Ignition switch (ON) status judges from IGN signal (ignition power supply)
KEY ON SW [ON/OFF] The switch status input from key switch
DOOR SW-DR [ON/OFF] The switch status input from front door switch LH
DOOR SW-AS [ON/OFF] The switch status input from front door switch RH
DOOR SW-RR [ON/OFF] The switch status input from rear door switch RH
DOOR SW- RL [ON/OFF] The switch status input from rear door switch LH
BACK DOOR SW [ON/OFF] The switch status input from back door switch
KEY CYL LK-SW [ON/OFF] Lock switch status input from door lock and unlock switch
KEY CYL UN-SW [ON/OFF] Lock switch status input from door lock and unlock switch
CDL LOCK SW [ON/OFF] Lock switch status input from door lock and unlock switch
CDL UNLOCK SW [ON/OFF] Unlock switch status input from door lock and unlock switch
I-KEY LOCK [ON/OFF] Lock signal status received from Intelligent Key unit by CAN communication
I-KEY UNLOCK [ON/OFF] Unlock signal status received from Intelligen t Key unit by CAN communication
Revision: December 20092009 QX56

DIAGNOSIS SYSTEM (BCM)INL-13
< FUNCTION DIAGNOSIS >
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ACTIVE TEST
BATTERY SAVER
BATTERY SAVER : CONSULT-III Function (BCM - BATTERY SAVER)INFOID:0000000004109549
WORK SUPPORT
*: Initial setting
DATA MONITOR
ACTIVE TEST
*: Each lamp switch is in ON position. Test Item
Operation Description
INT LAMP ON Outputs the interior room lamp control signal to turn the interior room lamps ON.
OFF Stops the interior room lamp control signal to turn the interior room lamps OFF.
IGN ILLUM ON
Outputs the ignition keyhole illumination control signal to turn the ignition keyhole il-
lumination lamp ON.
OFF Stops the ignition keyhole illumination control signal to turn the ignition keyhole illu-
mination lamp OFF.
STEP LAMP TEST ON Outputs the step lamp control signal to turn the step lamps ON.
OFF Stops the step lamp control signal to turn the step lamps OFF.
LUGGAGE LAMP TEST ON Outputs the luggage lamp control signal to turn the luggage lamp ON.
OFF Stops the luggage lamp control signal to turn the luggage lamp OFF.
Work Item Setting Item Setting
ROOM LAMP TIMER SET MODE 1* 15 min.
Sets the interior room lamp battery saver timer operating
time.
MODE 2 30 min.
Monitor Item
[Unit] Description
IGN ON SW [ON/OFF] Ignition switch (ON) status judges from IGN signal (ignition power supply)
KEY ON SW [ON/OFF] The switch status input from key switch
DOOR SW-DR [ON/OFF] The switch status input from front door switch (driver side)
DOOR SW-AS [ON/OFF] The switch status input from front door switch (passenger side)
DOOR SW-RR [ON/OFF] The switch status input from rear door switch RH
DOOR SW- RL [ON/OFF] The switch status input from rear door switch LH
BACK DOOR SW [ON/OFF] The switch status input from back door switch
KEY CYL LK-SW [ON/OFF] Lock switch status input from door key cylinder switch
KEY CYL UN-SW [ON/OFF] Unlock switch status input from door key cylinder switch
CDL LOCK SW [ON/OFF] Lock switch status input from door lock and unlock switch
CDL UNLOCK SW [ON/OFF] Unlock switch status input from door lock and unlock switch
I-KEY LOCK [ON/OFF] Lock signal status received from Intelligent Key unit by CA N communication
I-KEY UNLOCK [ON/OFF] Unlock signal status received from Intelligen t Key unit by CAN communication
Test ItemOperation Description
BATTERY SAVER OFF Cuts the interior room lamp power supply to turn interior room lamps OFF.
ON Outputs the interior room lamp power supply to turn interior room lamps ON.*
Revision: December 20092009 QX56

INL-14
< COMPONENT DIAGNOSIS >
POWER SUPPLY AND GROUND CIRCUIT
COMPONENT DIAGNOSIS
POWER SUPPLY AND GROUND CIRCUIT
BCM
BCM : Diagnosis ProcedureINFOID:0000000004109550
1. CHECK FUSES AND FUSIBLE LINK
Check that the following fuses and fusible link are not blown.
Is the fuse blown?
YES >> Replace the blown fuse or fusible link after repairing the affected circuit.
NO >> GO TO 2
2. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM.
3. Check voltage between BCM harness connector and ground.
Is the measurement value normal?
YES >> GO TO 3
NO >> Repair or replace harness.
3. CHECK GROUND CIRCUIT
Check continuity between BCM harness connector and ground.
Does continuity exist?
YES >> Inspection End.
NO >> Repair or replace harness.
Terminal No. Signal nameFuses and fusible link No.
57 Battery power supply 22 (15A)
70 F (50A)
11 Ignition ACC or ON 4 (10A)
38 Ignition ON or START 59 (10A)
ConnectorTe r m i n a l s
Power
source Condition Voltage (V) (Ap-
prox.)
(+) (-)
M18 11 Ground
ACC
power
supply Ignition
switch
ACC or ON Battery voltage
38 Ground Ignition
power
supply Ignition
switch ON
or START Battery voltage
M20 57 Ground
Battery
power
supply Ignition
switch OFF Battery voltage
70 Ground Battery
power
supply Ignition
switch OFF Battery voltage
LIIA2415E
BCM
GroundContinuity
Connector Terminal
M20 67 Yes
LIIA0915E
Revision: December 20092009 QX56

BATTERY SAVER OUTPUT/POWER SUPPLY CIRCUITINL-15
< COMPONENT DIAGNOSIS >
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BATTERY SAVER OUTPUT/POWER SUPPLY CIRCUIT
DescriptionINFOID:0000000003776251
Provides the battery saver output/power supply. Also cu ts the power supply when the interior room lamp bat-
tery saver is activating.
Component Function CheckINFOID:0000000003776252
1.CHECK BATTERY SAVER OUTPUT /POWER SUPPLY FUNCTION
CONSULT-III
1. Turn ignition switch ON.
2. Turn each interior room lamp ON.
- Front room/map lamp assembly
- Vanity lamps
- Personal lamp 2nd row
- Personal lamp 3rd row
- Cargo lamp
3. Open the driver door to turn ON the step lamps, foot lamps and puddle lamps.
- Front step lamps
- Rear step lamps
- Foot lamps
- Puddle lamps
- Ignition keyhole Illumination
4. Select “BATTERY SAVER” of BCM (BATTERY SAVER) active test item.
5. While operating the test item, check that each interior room lamp turns ON/OFF.
Is the inspection result normal?
YES >> Battery saver output/power supply circuit is normal.
NO >> Refer to INL-15, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000003776253
1.CHECK BATTERY SAVER OUTPUT/POWER SUPPLY OUTPUT
CONSULT-III
1. Turn ignition switch ON.
2. Select “BATTERY SAVER” of BCM (BATTERY SAVER) active
test item.
3. While operating the test item, check voltage between BCM con-
nector M20 terminal 56 and ground.
Is the inspection result normal?
YES >> GO TO 2
NO >> Replace BCM. Refer to BCS-56, "
Removal and Installation".
2.CHECK BATTERY SAVER OUTPUT/P OWER SUPPLY OPEN CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect the following connectors.
-BCM M20
- Ignition keyhole illumination OFF : Interior room lamps OFF
ON : Interior room lamps ON
(+)
(-)Te s t i t e m
Voltag e
Connector Terminal BATTERY SAVER
M20 56 Ground OFF
0V
ON Battery voltage
ALLIA0408GB
Revision: December 20092009 QX56

INL-16
< COMPONENT DIAGNOSIS >
BATTERY SAVER OUTPUT/POWER SUPPLY CIRCUIT
- Front step lamp LH
- Front step lamp RH
- Door mirror LH
- Door mirror RH
- Rear step lamp LH
- Rear step lamp RH
- Foot lamp LH
- Foot lamp RH
- Front room/map lamp assembly
- Vanity lamp LH
- Vanity lamp RH
- Cargo lamp
- Personal lamp 2nd row
- Personal lamp 3rd row
3. Check continuity between BCM connector M20 terminal 56 and each interior room lamp connector.
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair the harness or connectors.
3.CHECK BATTERY SAVER OUTPUT/P OWER SUPPLY SHORT CIRCUIT
Check continuity between BCM connector M20 terminal 56 and
ground.
Is the inspection result normal?
YES >> Check that each interior room lamp has no internal short circuit.
NO >> Repair the harness or connectors.
BCM Interior room lamp
Continuity
Connector Terminal ConnectorTerminal
M20 56 Ignition keyhole illumination
M1501
Ye s
Front step lamp LH
D111
Front step lamp RH D1091
Door mirror LH D412
Door mirror RH D10712
Rear step lamp LH D2061
Rear step lamp RH D3061
Foot lamp LH M991
Foot lamp RH M1001
Front room/map lamp assembly R1026
Vanity lamp LH R31
Vanity lamp RH R81
Cargo lamp B1532
Personal lamp 2nd row R2033
Personal lamp 3rd row R2053
Connector Terminal —Continuity
M20 56Ground No
ALLIA0409GB
Revision: December 20092009 QX56

INTERIOR ROOM LAMP CONTROL CIRCUITINL-17
< COMPONENT DIAGNOSIS >
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INTERIOR ROOM LAMP CONTROL CIRCUIT
DescriptionINFOID:0000000003776254
Controls the following interior room lamps (ground side) by PWM signal
• Puddle lamps
• Front room/map lamp assembly
• Personal lamp 2nd row
• Personal lamp 3rd row
NOTE:
PWM signal control period is approximately 250 Hz (in the gradual brightening/dimming).
Component Function CheckINFOID:0000000003776255
CAUTION:
Before performing the diagnosis, check that the following is normal.
• Battery saver output/power supply
• Front room/map lamp bulbs
• Personal lamp bulbs
• Puddle lamp bulbs
1.CHECK INTERIOR ROOM LAMP CONTROL FUNCTION
CONSULT-III
1. Switch the front room/map lamp assembly switch to DOOR.
2. Turn ignition switch ON.
3. Select “INT LAMP” of BCM (INT LAMP) active test item.
4. While operating the test item, check that each interi or room lamp turns ON/OFF (gradual brightening/dim-
ming).
Is the inspection result normal?
YES >> Interior room lamp control circuit is normal.
NO >> Refer to INL-17, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000003776256
1.CHECK INTERIOR ROOM LAMP CONTROL OUTPUT
CONSULT-III
1. Switch the front room/map lamp assembly switch to DOOR.
2. Turn ignition switch ON.
3. Select “INT LAMP” of BCM (INT LAMP) active test item.
4. While operating the test item, check voltage between BCM con- nector M20 terminal 63 and ground.
Is the inspection result normal?
YES >> Interior room lamp control circuit is operating normally.
Fixed ON>>GO TO 3
Fixed OFF>>GO TO 2
2.CHECK INTERIOR ROOM LAMP CONTROL OPEN CIRCUIT ON : Interior room lamp gradual brightening
OFF : Interior room lamp gradual dimming
(+)
(-) INT LAMP Voltage
Connector Terminal
M20 63 Ground ON
0V
OFF Battery voltage
ALLIA0410GB
Revision: December 20092009 QX56

INL-18
< COMPONENT DIAGNOSIS >
INTERIOR ROOM LAMP CONTROL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector M20, door mirror connectors andfront room/map lamp assembly connector.
3. Check continuity between BCM connector M20 (A) terminal 63 and the door mirror connectors (B) and front room/map lamp
assembly connector (C).
4. Reconnect the front room/map lamp assembly connector.
5. Check continuity between BCM connector M20 (A) terminal 63 and the 2nd and 3rd row personal lamp connectors (B) terminal
1.
Is the inspection result normal?
YES >> Check interior room lamps for an open. If OK, replace BCM. Refer to BCS-56, "Removal and
Installation". If NG, replace interior room lamp. Refer to INL-73, "Removal and Installation".
NO >> Repair the harness or connectors.
3.CHECK INTERIOR ROOM LAMP CONTROL SHORT CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector M20, door mirror connectors and 2nd and 3rd row personal lamp connectors.
3. Switch the front room/map lamp assembly switch to ON posi- tion.
4. Check continuity between BCM connector M20 terminal 63 and ground.
Is the inspection result normal?
YES >> Check interior room lamps for a short circuit. If OK, replace BCM. Refer to BCS-56, "Removal and
Installation". If NG, replace interior room lamp. Refer to INL-73, "Removal and Installation".
NO >> Repair the harness or connectors.
BCM Interior room lamp
Continuity
Connector Terminal Component Connector Terminal
M20 (A) 63 Door mirror LH D4 (B) 13
Ye s
Door mirror RH D107 (B) 13
Front room/map
lamp assembly R102 (C) 1
AWLIA0968ZZ
BCM
Interior room lamp
Continuity
Connector Terminal Component Connector Terminal
M20 (A) 63 Personal lamp 2nd
row
R203 (B) 1
Ye s
Personal lamp 3rd
row R205 (B) 1
ALLIA0412GB
Connector
Terminal —Continuity
M20 63Ground No
ALLIA0413GB
Revision: December 20092009 QX56

STEP LAMP CIRCUITINL-19
< COMPONENT DIAGNOSIS >
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STEP LAMP CIRCUIT
DescriptionINFOID:0000000003776257
Controls the front and rear step lamps and the foot lamps (ground side) to turn the lamps ON and OFF.
Component Function CheckINFOID:0000000003776258
CAUTION:
Before performing the diagnosis, check that the following is normal.
• Battery saver output/power supply
• Front step lamp bulbs
• Rear step lamp bulbs
• Foot lamp bulbs
1.CHECK STEP LAMP OPERATION
CONSULT-III
1. Turn ignition switch ON.
2. Select “STEP LAMP TEST” of BC M (INT LAMP) active test item.
3. While operating the test item, check that the front/rear step lamps and foot lamps turn ON/OFF.
Is the inspection result normal?
YES >> Step lamp circuit is normal.
NO >> Refer to INL-19, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000003776259
1.CHECK STEP LAMP OUTPUT
CONSULT-III
1. Turn ignition switch ON.
2. Select “STEP LAMP TEST” of BC M (INT LAMP) active test item.
3. While operating the test item, check voltage between BCM har- ness connector M20 terminal 62 and ground.
Is the inspection result normal?
YES >> Step lamp circuit is operating normally.
Fixed ON>>GO TO 3
Fixed OFF>>GO TO 2
2.CHECK STEP LAMP OPEN CIRCUIT ON : Step lamp ON
OFF : Step lamp OFF
Connector Terminal —
STEP LAMP
TEST Vo l ta g e
M20 62 Ground ON
0V
OFF Battery voltage
ALLIA0414GB
Revision: December 20092009 QX56

INL-20
< COMPONENT DIAGNOSIS >
STEP LAMP CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector M20, front step lamp, rear step lampand foot lamp connectors.
3. Check continuity between BCM connector M20 (A) terminal 62 and step lamp connectors (B) and foot lamp connectors (C).
Is the inspection result normal?
YES >> Check step lamp or foot lamp for an open. If OK, replace BCM. Refer to BCS-56, "
Removal and Installation". If
NG, replace step lamp or foot lamp. Refer to INL-73,
"Removal and Installation".
NO >> Repair harness or connectors.
3.CHECK STEP LAMP SHORT CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector M20, front and rear step lamp con- nectors and foot lamp connectors.
3. Check continuity between BCM connector M20 terminal 62 and ground.
Is the inspection result normal?
YES >> Check step lamp or foot lamp for a short circuit. If OK, replace BCM. Refer to BCS-56, "
Removal and Installa-
tion". If NG, replace step lamp or foot lamp. Refer to INL-73, "Removal and Installation".
NO >> Repair the harness or connectors.
Connector Terminal ConnectorTerminal Continuity
M20 (A) 62 Front step lamp LH D11 (B) 2
Ye s
Front step lamp RH D109 (B) 2
Rear step lamp LH D206 (B) 2
Rear step lamp
RH D306 (B) 2
Foot lamp LH M99 (C) 2
Foot lamp RH M100 (C) 2
ALLIA0415GB
Connector Terminal —Continuity
M20 62Ground No
ALLIA0416GB
Revision: December 20092009 QX56

CARGO LAMP CONTROL CIRCUITINL-21
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CARGO LAMP CONTROL CIRCUIT
DescriptionINFOID:0000000003776260
Controls the cargo lamp (ground side) to turn the cargo lamp ON and OFF.
Component Function CheckINFOID:0000000003776261
CAUTION:
Before performing the diagnosis, check that the following is normal.
• Battery saver output/power supply
• Cargo lamp bulb
1.CHECK CARGO LAMP OPERATION
CONSULT-III
1. Turn ignition switch ON.
2. Select “LUGGAGE LAMP TEST” of BCM (INT LAMP) active test item.
3. While operating the test item, chec k that cargo lamp turns ON/OFF.
Is the inspection result normal?
YES >> Cargo lamp circuit is normal.
NO >> Refer to INL-19, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000003776262
1.CHECK CARGO LAMP OUTPUT
CONSULT-III
1. Turn ignition switch ON.
2. Select “LUGGAGE LAMP TEST” of BCM (INT LAMP) active test
item.
3. While operating the test item, check voltage between BCM con-
nector M19 terminal 49 and ground.
Is the inspection result normal?
YES >> Cargo lamp control circuit is operating normally.
Fixed ON>>GO TO 3
Fixed OFF>>GO TO 2
2.CHECK CARGO LAMP OPEN CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM connector M19 and cargo lamp connector.
3. Check continuity between BCM connector M19 (A) terminal 49 and cargo lamp connector B153 (B) terminal 1.
Is the inspection result normal?
ON : Cargo lamp ON
OFF : Cargo lamp OFF
Connector Terminal — LUGGAGE
LAMP TEST Vo l ta g e
M19 49 Ground ON
0V
OFF Battery voltage
ALLIA0417GB
BCM Cargo lamp
Continuity
Connector Terminal Connector Terminal
M19 (A) 49B153 (B) 1Yes
ALLIA0418GB
Revision: December 20092009 QX56