Air INFINITI QX56 2010 Factory Service Manual

BACK DOOR OPENER FUNCTIONDLK-29
< FUNCTION DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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• When the back door reaches the half-latch state, the half- latch switch detects this and the signal is sent to
the back door control unit terminal 22.
• When the back door control unit receives the half latch switch signal, it switches OFF the back door motor
and the magnetic clutch and operates the cinch latch motor.
• When the back door latch operates and full close is det ected through terminal 14 of the back door control
unit, the cinch latch motor reverses to the neutral position and the back door aut\
o closure operation ends
and the door is fully closed.
Remote Keyless Entry Operation (Fully Open → Fully Closed Operation)
• When the remote keyless entry switch is pressed for at least 0.5 seconds, the back door control unit terminal
21 receives the signal.
• The back door control units checks door position through the rotary encoder.
• When the back door control unit receives the signal, if the auto back door operating enable conditions are
met, it sends a signal through terminal 6 and grounds terminal 9 to sound the warning chime and sends a
signal to the BCM through terminal 4 to flash the hazard lamps.
• The back door control unit supplies power to the m agnetic clutch and the back door motor and move the
back door in the close direction. (At this time, it al so executes speed control, input reverse, and anti-pinch
detection control.)
• When the back door reaches the half-latch state, the half- latch switch detects this and the signal is sent to
the back door control unit terminal 22.
• When the back door control unit receives the half latch switch signal, it switches OFF the back door motor
and the magnetic clutch and operates the cinch latch motor.
• When the back door latch operates and full close is det ected through terminal 14 of the back door control
unit, the cinch latch motor reverses to the neutral position and the back door aut\
o closure operation ends
and the door is fully closed.
Back Door Close Switch Operation (Fully Open → Fully Closed Operation)
• When the back door close switch is pressed, the ba ck door control unit terminal 8 receives the signal.
• The back door control units checks back door close switch (terminal 13) status and door position (must be
fully opened), through rotary encoder and battery voltage.
• When the back door control unit receives the signal, if the auto back door operating enable conditions are met, it sends a signal through terminal 6 and grounds terminal 9 to sound the warning chime and sends a
signal to the BCM through terminal 4 to flash the hazard lamps.
• The back door control unit supplies power to the m agnetic clutch and the back door motor and move the
back door in the close direction. (At this time, it al so executes speed control, input reverse, and anti-pinch
detection control.)
• When the back door reaches the half-latch state, the half- latch switch detects this and the signal is sent to
the back door control unit terminal 22.
• When the back door control unit receives the half latch switch signal, it switches OFF the back door motor and the magnetic clutch and operates the cinch latch motor.
• When the back door latch operates and full close is det ected through terminal 14 of the back door control
unit, the cinch latch motor reverses to the neutral position and the back door aut\
o closure operation ends
and the door is fully closed.
Reversal
The door will reverse direction during power open or close operation if the automatic door main switch, keyfob
or back door close switch is operated. A chime will sound to announce the reversal.
Anti-Pinch Function
• During auto operation, if an object is detected in the door's path, a warning chime sounds and the back door
operates in the reverse direction to prevent pinching.
• During auto close operation, if an object is detected by the pinch strips in the door's path, a warning chime sounds and the back door operates in the open direction until it is fully open.
Gas Stay Check
• During each power open operation, the back door control unit monitors motor current draw to determine ifthe gas stays are functioning properly.
• If a malfunction of the gas stays is detected, the back door control unit will close the back door while sound-
ing the warning chime. The back door cannot be opened usi ng the switches until the gas stay malfunction is
repaired.
Warning Functions
• The hazard warning lamps flash and a warning chime is sounded according to the back door operating state,
operations, and conditions.
Revision: April 20092010 QX56

DLK-52
< FUNCTION DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
DIAGNOSIS SYSTEM (BCM)
DIAGNOSIS SYSTEM (BCM)
COMMON ITEM
COMMON ITEM : CONSULT-III Fu
nction (BCM - COMMON ITEM)INFOID:0000000005380573
APPLICATION ITEM
CONSULT-III performs the following functions via CAN communication with BCM.
SYSTEM APPLICATION
BCM can perform the following functions for each system.
NOTE:
It can perform the diagnosis modes except the following for all sub system selection items.
DOOR LOCK
Diagnosis mode Function Description
WORK SUPPORT Changes the setting for each system function.
SELF-DIAG RESULTS Displays the diagnosis results judged by BCM. Refer to BCS-54, "
DTCIndex".
CAN DIAG SUPPORT MNTR Monitors the reception status of CAN communication viewed from BCM.
DATA MONITOR The BCM input/output signals are displayed.
ACTIVE TEST The signals used to activate each device are forcibly supplied from BCM.
ECU IDENTIFICATION The BCM part number is displayed.
CONFIGURATION • Enables to read and save the vehicle specification.
• Enables to write the vehicle specification when replacing BCM.
System
Sub system selection item Diagnosis mode
WORK SUPPORT DATA MONITOR ACTIVE TEST
BCM BCM ×
Door lock DOOR LOCK ×××
Rear window defogger REAR DEFOGGER ×
Warning chime BUZZER ××
Interior room lamp timer INT LAMP ×××
Remote keyless entry system MULTI REMOTE ENT ××
Exterior lamp HEAD LAMP ×××
Wiper and washer WIPER ×××
Turn signal and hazard warning lamps FLASHER ××
Air conditioner AIR CONDITONER ×
Intelligent Key system INTELLIGENT KEY ×
Combination switch COMB SW ×
Immobilizer IMMU ××
Interior room lamp battery saver BATTERY SAVER ×××
Back door open TRUNK ××
RAP (retained accessory power) RETAINED PWR ×××
Signal buffer system SIGNAL BUFFER ××
TPMS (tire pressure monitoring sys-
tem) AIR PRESSURE MONITOR
×××
Vehicle security system THEFT ALM ×××
Panic alarm system PANIC ALARM ×
Revision: April 20092010 QX56

U1010 CONTROL UNIT (CAN)DLK-59
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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U1010 CONTROL UNIT (CAN)
DTC LogicINFOID:0000000005146908
DTC DETECTION LOGIC
Diagnosis ProcedureINFOID:0000000005146909
1.REPLACE BCM
When DTC [U1010] is detected, replace BCM.
>> Replace BCM. Refer to BCS-59, "
Removal and Installation".
Special Repair RequirementINFOID:0000000005146910
1.REQUIRED WORK WHEN REPLACING BCM
The BCM must be initialized when replaced. Refer to BCS-3, "
CONFIGURATION : Description" for BCM con-
figuration.
Initialize NVIS by CONSULT-III. For the details of initialization refer to CONSULT-III operation manual.
>> Work end.
DTC CONSULT-III display de-
scription DTC Detection Condit
ion Possible cause
U1010 CONTROL UNIT (CAN) BCM detected internal CAN communication circuit malfunction. BCM
Revision: April 20092010 QX56

CENTER CONSOLE AREA ANTENNA (REAR)DLK-61
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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3. Check continuity between Intelligent Key unit harness connector (A) M70 terminals 15, 16 and ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair or replace harness between Intelligent Key unit and center console area antenna (rear).
3.CHECK INSIDE KEY ANTENNA POWER SUPPLY SINGAL
1. Replace center console area antenna (rear). (New antenna or other antenna)
2. Connect Intelligent Key unit connector.
3. Check signal between Intelligent Key unit connector and ground with oscilloscope.
Is the inspection result normal?
YES >> Replace center console area antenna (rear).
NO >> Replace Intelligent Key unit. Refer to SEC-120, "
Removal and Installation".
Intelligent Key
unit connectorTe r m i n a l sCenter console area
antenna (rear) con-
nector Terminals Continuity
A: M70 15
B: M209 1
Ye s
16 2
Item Connector TerminalsContinuity
Intelligent Key unit A: M70 15
Ground No
16
ALKIA0586ZZ
Connector Item Te r m i n a l s
Condition Signal (V)
(Reference value)
(+) (–)
M70 Intelligent
Key unit 15 Ground Ignition
switch is
pushed.
ALKIA0585ZZ
PIIB7441E
Revision: April 20092010 QX56

LUGGAGE AREA ANTENNADLK-63
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3. Check continuity between Intelligent Key unit harness connector (A) M70 terminals 35, 36 and ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair or replace harness between Intelligent Key unit and luggage area antenna.
3.CHECK INSIDE KEY ANTENNA POWER SUPPLY SINGAL
1. Replace luggage area antenna. (New antenna or other antenna)
2. Connect Intelligent Key unit connector.
3. Check signal between Intelligent Key unit connector and ground with oscilloscope.
Is the inspection result normal?
YES >> Replace luggage area antenna.
NO >> Replace Intelligent Key unit. Refer to SEC-120, "
Removal and Installation".
Intelligent Key
unit connectorTe r m i n a l sLuggage area an-
tenna connector Terminals Continuity
A: M70 35
B: B76 1
Ye s
36 2
Item Connector TerminalsContinuity
Intelligent Key unit A: M70 35
Ground No
36
ALKIA0588ZZ
Connector Item Te r m i n a l s
Condition Signal (V)
(Reference value)
(+) (–)
M70 Intelligent
Key unit 35 Ground Ignition
switch is
pushed.
ALKIA0587ZZ
PIIB7441E
Revision: April 20092010 QX56

CENTER CONSOLE AREA ANTENNA (FRONT)DLK-65
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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3. Check continuity between Intelligent Key unit harness connector (A) M70 terminals 13, 14 and ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair or replace harness between Intelligent Key unit and center console area antenna (front).
3.CHECK INSIDE KEY ANTENNA POWER SUPPLY SINGAL
1. Replace center console area antenna (front). (New antenna or other antenna)
2. Connect Intelligent Key unit connector.
3. Check signal between Intelligent Key unit connector and ground with oscilloscope.
Is the inspection result normal?
YES >> Replace center console area antenna (front).
NO >> Replace Intelligent Key unit. Refer to SEC-120, "
Removal and Installation".
Intelligent Key
unit connectorTe r m i n a l sCenter console area
antenna (front) con-
nector Terminals Continuity
A: M70 13
B: M210 1
Ye s
14 2
Item Connector TerminalsContinuity
Intelligent Key unit A: M70 13
Ground No
14
ALKIA0584ZZ
Connector Item Te r m i n a l s
Condition Signal (V)
(Reference value)
(+) (–)
M70 Intelligent
Key unit 13 Ground Ignition
switch is
pushed.
ALKIA0583ZZ
PIIB7441E
Revision: April 20092010 QX56

OVERHEAD CONSOLE AREA ANTENNADLK-67
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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3. Check continuity between Intelligent Key unit harness connector (A) M70 terminals 33, 34 and ground.
Is the inspection result normal?
YES >> GO TO 3
NO >> Repair or replace harness between Intelligent Key unit and overhead console area antenna.
3.CHECK INSIDE KEY ANTENNA POWER SUPPLY SINGAL
1. Replace overhead console area antenna. (New antenna or other antenna)
2. Connect Intelligent Key unit connector.
3. Check signal between Intelligent Key unit connector and ground with oscilloscope.
Is the inspection result normal?
YES >> Replace overhead console area antenna.
NO >> Replace Intelligent Key unit. Refer to SEC-120, "
Removal and Installation".
Intelligent Key
unit connectorTe r m i n a l sOverhead console
area antenna con-
nector Terminals Continuity
A: M70 33
B: R210 1
Ye s
34 2
Item Connector TerminalsContinuity
Intelligent Key unit A: M70 33
Ground No
34
ALKIA0590ZZ
Connector Item Te r m i n a l s
Condition Signal (V)
(Reference value)
(+) (–)
M70 Intelligent
Key unit 33 Ground Ignition
switch is
pushed.
ALKIA0589ZZ
PIIB7441E
Revision: April 20092010 QX56

DLK-68
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
POWER SUPPLY AND GROUND CIRCUIT
POWER SUPPLY AND GROUND CIRCUIT
INTELLIGENT KEY UNIT
INTELLIGENT KEY UNIT
: Diagnosis ProcedureINFOID:0000000005146923
Regarding Wiring Diagram information, refer to DLK-178, "Wiring Diagram — INTELLIGENT KEY SYSTEM —
".
1.CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect Intelligent Key unit connector.
3. Check voltage between Intelligent Key unit harness connector M70 terminals 6, 11 and ground.
Is the inspection result normal?
YES >> GO TO 2
NO >> Repair or replace Intelligent Key unit power supply circuit.
2.CHECK GROUND CIRCUIT
Check continuity between Intelligent Key unit harness connector
M70 terminal 12 and ground.
Is the inspection result normal?
YES >> Power supply and ground circuits are OK.
NO >> Repair or replace the Intelligent Key unit ground circuit.
BCM (BODY CONTROL MODULE)
BCM (BODY CONTROL MODULE) : Diagnosis ProcedureINFOID:0000000005380580
Regarding Wiring Diagram information, refer to BCS-49, "Wiring Diagram".
1. CHECK FUSES AND FUSIBLE LINK
Check that the following fuses and fusible link are not blown.
Is the fuse blown?
Connector Terminals Ignition switch position
M70 (+) (–) OFF
ON
6 Ground 0V Battery voltage
11 Battery voltage Battery voltage
WIIA1171E
12 - Ground : Continuity should exist.
WIIA1172E
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)
Revision: April 20092010 QX56

POWER SUPPLY AND GROUND CIRCUITDLK-69
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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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.
BACK DOOR CONTROL UNIT
BACK DOOR CONTROL UNIT : Diagnosis ProcedureINFOID:0000000005146925
Regarding Wiring Diagram information, refer to DLK-199, "Wiring Diagram—AUTOMATIC BACK DOOR SYS-
TEM—".
1.BACK DOOR POWER SUPPLY CIRCUIT INSPECTION
1. Turn ignition switch OFF.
2. Disconnect back door control unit connector.
Connector Te 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: April 20092010 QX56

DLK-70
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
POWER SUPPLY AND GROUND CIRCUIT
3. Check voltage between back door control unit connector B55
terminals 3, 7, 10 and ground.
Is the inspection result normal?
YES >> GO TO 2
NO >> Repair the back door control unit power supply circuit.
2.BACK DOOR GROUND CIRCUIT INSPECTION
Check continuity between back door control unit connector B55 ter-
minal 1, 2 and ground.
Is the inspection result normal?
YES >> Circuit is OK.
NO >> Repair the harness between the back door control unit and ground.
Connector Te r m i n a l s
Power
source Condition
Voltage (V) (Ap-
prox.)
(+) (-)
B55 3Ground
Battery
power
supply Ignition
switch OFF Battery voltage
7Ground Ignition
power
supply Ignition
switch ON
or START Battery voltage
10 Ground Battery
power
supply Ignition
switch OFF Battery voltage
ALKIA1604ZZ
BCM
GroundContinuity
Connector Terminal
B55 1Y
es
2Y es
LIIA0801E
Revision: April 20092010 QX56