INFINITI QX56 2009 Factory Service Manual

U1010 CONTROL UNIT (CAN)DLK-59
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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U1010 CONTROL UNIT (CAN)
DTC LogicINFOID:0000000003775711
DTC DETECTION LOGIC
Diagnosis ProcedureINFOID:0000000003775712
1.REPLACE BCM
When DTC [U1010] is detected, replace BCM.
>> Replace BCM. Refer to BCS-56, "
Removal and Installation".
Special Repair RequirementINFOID:0000000003775713
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: December 20092009 QX56

DLK-60
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
INSIDE KEY ANTENNA 1 (RE
AR OF CENTER CONSOLE)
INSIDE KEY ANTENNA 1 (REAR OF CENTER CONSOLE)
DescriptionINFOID:0000000003775714
Detects whether Intelligent Key is inside the vehicle.
Component Function CheckINFOID:0000000003775715
1.CHECK INSIDE KEY ANTENNA INPUT SIGNAL
With CONSULT-III
1. Check “ANTENNA” in “Active Test” mode with CONSULT-III.
2. Touch “INSIDE KEY ANTENNA 1”.
3. When Intelligent Key is inside key antenna (rear of center console) detection area, hazard lamps flash.
Is the inspection result normal?
YES >> Inside key antenna 1 (rear of center console) is OK.
NO >> Refer to DLK-60, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000003775716
1.CHECK INSIDE KEY ANTENNA POWER SUPPLY SIGNAL
1. Turn ignition switch OFF.
2. Check signal between Intelligent Key unit connector and ground with an oscilloscope.
Is the inspection result normal?
YES >> Inside key antenna 1 (rear of center console) is OK.
NO >> GO TO 2
2.CHECK INSIDE KEY ANTENNA
1. Disconnect Intelligent Key unit connector and inside key antenna 1 (rear of center console) connectors.
2. Check continuity between Intelligent Key unit harness connector (A) M70 terminals 15, 16 and inside key antenna 1 (rear of center console) har ness connector (B) M209 terminals 1, 2.
3. Check continuity between Inte lligent Key unit harness connector
(A) M70 terminals 15, 16 and ground.
Test Item Condition Possible cause
INSIDE KEY ANTENNA 1 An excessive high or low voltage from inside
antenna is sent to the Intelligent Key Unit • Inside key antenna 1 (rear of center console)
• Between Intelligent Key unit and inside key antenna 1
(rear of center console)
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.
ALKIA0585ZZPIIB7441E
Intelligent Key
unit connector
Te r m i n a l sInside key antenna
1 (rear of center
console) connector Terminals Continuity
A: M70 15
B: M209 1
Ye s
16 2
ALKIA0586ZZ
Revision: December 20092009 QX56

INSIDE KEY ANTENNA 1 (REAR OF CENTER CONSOLE)DLK-61
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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Is the inspection result normal?
YES >> GO TO 3
NO >> Repair or replace harness between Intelligent Key unit and inside key antenna 1 (rear of center console).
3.CHECK INSIDE KEY ANTENNA POWER SUPPLY SINGAL
1. Replace inside key 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 inside key antenna 1 (rear of center console).
NO >> Replace Intelligent Key unit. Refer to S E C - 111 , "
Removal and Installation".
Item ConnectorTerminalsContinuity
Intelligent Key unit A: M70 15
Ground No
16
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: December 20092009 QX56

DLK-62
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
INSIDE KEY ANTENNA 2 (LUGGAGE COMPARTMENT)
INSIDE KEY ANTENNA 2 (LUGGAGE COMPARTMENT)
DescriptionINFOID:0000000003775717
Detects whether Intelligent Key is inside the vehicle.
Component Function CheckINFOID:0000000003775718
1.CHECK INSIDE KEY ANTENNA INPUT SIGNAL
With CONSULT-III
1. Check “ANTENNA” in “Active Test” mode with CONSULT-III.
2. Touch “INSIDE KEY ANTENNA 2”.
3. When Intelligent Key is inside key antenna (luggage compartment) detection area, hazard lamps flash.
Is the inspection result normal?
YES >> Inside key antenna 2 (luggage compartment) is OK.
NO >> Refer to DLK-62, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000003775719
1.CHECK INSIDE KEY ANTENNA POWER SUPPLY SIGNAL
1. Turn ignition switch OFF.
2. Check signal between Intelligent Key unit connector and ground with an oscilloscope.
Is the inspection result normal?
YES >> Inside key antenna 2 (luggage compartment) is OK.
NO >> GO TO 2
2.CHECK INSIDE KEY ANTENNA
1. Disconnect Intelligent Key unit connector and inside key antenna 2 (luggage compartment) connectors.
2. Check continuity between Intelligent Key unit harness connector (A) M70 terminals 35, 36 and inside key antenna 2 (luggage compartment) harness connector (B) B76 terminals 1, 2.
3. Check continuity between Inte lligent Key unit harness connector
(A) M70 terminals 35, 36 and ground.
Test Item Condition Possible cause
INSIDE KEY ANTENNA 2 An excessive high or low voltage from inside
antenna is sent to the Intelligent Key Unit • Inside key antenna 2 (luggage compartment)
• Between Intelligent Key unit and inside key antenna 2
(luggage compartment)
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.
ALKIA0587ZZPIIB7441E
Intelligent Key
unit connector
Te r m i n a l sInside key antenna
2 (luggage compart-
ment) connector Terminals Continuity
A: M70 35
B: B76 1
Ye s
36 2
ALKIA0588ZZ
Revision: December 20092009 QX56

INSIDE KEY ANTENNA 2 (LUGGAGE COMPARTMENT)DLK-63
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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Is the inspection result normal?
YES >> GO TO 3
NO >> Repair or replace harness between Intelligent Key unit and inside key antenna 2 (luggage com- partment).
3.CHECK INSIDE KEY ANTENNA POWER SUPPLY SINGAL
1. Replace inside key 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 inside key antenna 2 (luggage compartment).
NO >> Replace Intelligent Key unit. Refer to S E C - 111 , "
Removal and Installation".
Item ConnectorTerminalsContinuity
Intelligent Key unit A: M70 35
Ground No
36
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: December 20092009 QX56

DLK-64
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
INSIDE KEY ANTENNA 3 (FRONT OF CENTER CONSOLE)
INSIDE KEY ANTENNA 3 (FRO
NT OF CENTER CONSOLE)
DescriptionINFOID:0000000003775720
Detects whether Intelligent Key is inside the vehicle.
Component Function CheckINFOID:0000000003775721
1.CHECK INSIDE KEY ANTENNA INPUT SIGNAL
With CONSULT-III
1. Check “ANTENNA” in “Active Test” mode with CONSULT-III.
2. Touch “INSIDE KEY ANTENNA 3”.
3. When Intelligent Key is inside key antenna (front of center console) detection area, hazard lamps flash.
Is the inspection result normal?
YES >> Inside key antenna 3 (front of center console) is OK.
NO >> Refer to DLK-64, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000003775722
1.CHECK INSIDE KEY ANTENNA POWER SUPPLY SIGNAL
1. Turn ignition switch OFF.
2. Check signal between Intelligent Key unit connector and ground with an oscilloscope.
Is the inspection result normal?
YES >> Inside key antenna 3 (front of center console) is OK.
NO >> GO TO 2
2.CHECK INSIDE KEY ANTENNA
1. Disconnect Intelligent Key unit connector and inside key antenna 3 (front of center console) connectors.
2. Check continuity between Intelligent Key unit harness connector (A) M70 terminals 13, 14 and inside key antenna 3 (front of center console) har ness connector (B) M210 terminals 1, 2.
3. Check continuity between Inte lligent Key unit harness connector
(A) M70 terminals 13, 14 and ground.
Test Item Condition Possible cause
INSIDE KEY ANTENNA 3 An excessive high or low voltage from inside
antenna is sent to the Intelligent Key Unit • Inside key antenna 3 (front of center console)
• Between Intelligent Key unit and inside key antenna 3
(front of center console)
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.
ALKIA0583ZZPIIB7441E
Intelligent Key
unit connector
Te r m i n a l sInside key antenna
3 (front of center
console) connector Terminals Continuity
A: M70 13
B: M210 1
Ye s
14 2
ALKIA0584ZZ
Revision: December 20092009 QX56

INSIDE KEY ANTENNA 3 (FRONT OF CENTER CONSOLE)
DLK-65
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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Is the inspection result normal?
YES >> GO TO 3
NO >> Repair or replace harness between Intelligent Key unit and inside key antenna 3 (front of center console).
3.CHECK INSIDE KEY ANTENNA POWER SUPPLY SINGAL
1. Replace inside key 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 inside key antenna 3 (front of center console).
NO >> Replace Intelligent Key unit. Refer to S E C - 111 , "
Removal and Installation".
Item ConnectorTerminalsContinuity
Intelligent Key unit A: M70 13
Ground No
14
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: December 20092009 QX56

DLK-66
< COMPONENT DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
INSIDE KEY ANTENNA 4
(OVERHEAD CONSOLE AREA)
INSIDE KEY ANTENNA 4 (OVERHEAD CONSOLE AREA)
DescriptionINFOID:0000000003775723
Detects whether Intelligent Key is inside the vehicle.
Component Function CheckINFOID:0000000003775724
1.CHECK INSIDE KEY ANTENNA INPUT SIGNAL
With CONSULT-III
1. Check “ANTENNA” in “Active Test” mode with CONSULT-III.
2. Touch “INSIDE KEY ANTENNA 4”.
3. When Intelligent Key is inside key antenna (over head console area) detection area, hazard lamps flash.
Is the inspection result normal?
YES >> Inside key antenna 4 (overhead console area) is OK.
NO >> Refer to DLK-66, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000003775725
1.CHECK INSIDE KEY ANTENNA POWER SUPPLY SIGNAL
1. Turn ignition switch OFF.
2. Check signal between Intelligent Key unit connector and ground with an oscilloscope.
Is the inspection result normal?
YES >> Inside key antenna 4 (overhead console area) is OK.
NO >> GO TO 2
2.CHECK INSIDE KEY ANTENNA
1. Disconnect Intelligent Key unit connector and inside key antenna 4 (overhead console area) connectors.
2. Check continuity between Intelligent Key unit harness connector (A) M70 terminals 33, 34 and inside key antenna 4 (overhead console area) harness connector (B) R210 terminals 1, 2.
3. Check continuity between Inte lligent Key unit harness connector
(A) M70 terminals 33, 34 and ground.
Test Item Condition Possible cause
INSIDE KEY ANTENNA 4 An excessive high or low voltage from inside
antenna is sent to the Intelligent Key Unit • Inside key antenna 4 (overhead console area)
• Between Intelligent Key unit and inside key antenna 4
(overhead console area)
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.
ALKIA0589ZZPIIB7441E
Intelligent Key
unit connector
Te r m i n a l sInside key antenna
4 (overhead console
area) connector Terminals Continuity
A: M70 33
B: R210 1
Ye s
34 2
ALKIA0590ZZ
Revision: December 20092009 QX56

INSIDE KEY ANTENNA 4 (OVERHEAD CONSOLE AREA)DLK-67
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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Is the inspection result normal?
YES >> GO TO 3
NO >> Repair or replace harness between Intelligent Key unit and inside key antenna 4 (overhead con- sole area).
3.CHECK INSIDE KEY ANTENNA POWER SUPPLY SINGAL
1. Replace inside key 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 inside key antenna 4 (overhead console area).
NO >> Replace Intelligent Key unit. Refer to S E C - 111 , "
Removal and Installation".
Item ConnectorTerminalsContinuity
Intelligent Key unit A: M70 33
Ground No
34
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: December 20092009 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:0000000003775726
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:0000000004190660
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
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: December 20092009 QX56