2010 INFINITI QX56 engine

DLK-40
< FUNCTION DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
WARNING FUNCTION
LIST OF OPERATION RELATED PARTS
Parts marked with
× are the parts related to operation.
Engine start information ——
Steering lock information ——
Intelligent Key low battery warning ——
Warning/Information functions Combination meter display
Warning chime
Combination
meter buzzer Intelligent
Key warning
buzzer
ALKIA0967ZZ
ALKIA0702ZZ
JMKIA0048GB
Warning function
Intelligent Key
Intelligent Key unit
Ignition switch
Door switch
Door request switch
Inside key antenna
Outside key antenna
Intelligent Key warning buzzer
Combination meter warning buzzer
CAN communication system
BCM
Combination meter display
Park position switch
“KEY” warning lamp
Intelligent Key system malfunction ×××
OFF position warning For internal
×× ××
For external ×× ××
P position warning ×××× ××
Ta k e a w a y w a r n i n g Door is open or close
×× × × ×××××
Door is open ×××× ×××
Take away through win-
dow ××
× ×× ×
Intelligent Key is removed
from vehicle ××
×× ×
Door lock operation warning ×× ××××× ××
Key ID warning ××× ××××
Revision: April 20092010 QX56

WARNING FUNCTIONDLK-41
< FUNCTION DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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Key warning ×× × ××××
Intelligent Key insert information ×××× ××××
Engine start information Ignition switch is ON posi-
tion
××× ×
××××
Ignition switch is except
ON position ××× ×
×××
Steering lock information ××× ×
Intelligent Key low battery warning ×××× ×
Warning function
Intelligent Key
Intelligent Key unit
Ignition switch
Door switch
Door request switch
Inside key antenna
Outside key antenna
Intelligent Key warning buzzer
Combination meter warning buzzer
CAN communication system
BCM
Combination meter display
Park position switch
“KEY” warning lamp
Revision: April 20092010 QX56

INTELLIGENT KEY WARNING BUZZERDLK-95
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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INTELLIGENT KEY WARNING BUZZER
DescriptionINFOID:0000000005146963
Answers back and warns for an inappropriate operation.
Component Function CheckINFOID:0000000005146964
1.CHECK FUNCTION
With CONSULT-III
Check Intelligent Key warning buzzer "OUTSIDE BUZZER" in Active Test mode.
Is the inspection result normal?
YES >> Intelligent Key warning buzzer (engine room) is OK.
NO >> Refer to DLK-95, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000005146965
Regarding Wiring Diagram information, refer to DLK-178, "Wiring Diagram — INTELLIGENT KEY SYSTEM —
".
1.CHECK INTELLIGENT KEY WARNING BUZZER (ENGINE ROOM) POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect Intelligent Key warning buzzer (engine room) connector.
3. Check voltage between Intelligent Key warning buzzer (engine room) harness connector E25 terminal 1 and ground.
Is the inspection normal?
YES >> GO TO 2
NO >> Repair or replace Intelligent Key warning buzzer (engine room) power supply circuit.
2.CHECK INTELLIGENT KEY WARNING BUZZER (ENGINE ROOM) CIRCUIT
1. Disconnect Intelligent Key unit connector.
2. Check continuity between Intelligent Key unit harness connector (A) M70 terminal 4 and Intelligent Key warning buzzer (engine
room) harness connector E25 terminal 3.
3. Check continuity between Intelligent Key warning buzzer (engine room) harness connector E25 terminal 3 and ground.
Is the inspection normal?
YES >> GO TO 3
NO >> Repair or replace harness between Intelligent Key warning buzzer (engine room) and Intelligent Key unit.
3.CHECK INTELLIGENT KEY WARNING BU ZZER (ENGINE ROOM) OPERATION
Check DLK-96, "
Component Inspection".
1 - Ground : Battery voltage
WIIA1195E
4 - 3: Continuity should exist.
3 - Ground : Continuity should not exist.
WIIA1196E
Revision: April 20092010 QX56

AUTOMATIC BACK DOOR SELF-DIAGNOSIS PROCEDUREDLK-123
< COMPONENT DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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AUTOMATIC BACK DOOR SELF-DIAGNOSIS PROCEDURE
Self-Diagnosis ProcedureINFOID:0000000005146997
INPUT SIGNAL CHECK MODE
Input signal check mode allows testing of swit ch input signal to the back door control unit.
To activate input signal check mode on the automatic sliding door, perform the following steps:
1. Turn ignition switch OFF.
2. Turn back door close switch to CANCEL (system cancelled).
3. Place A/T selector lever in P position.
4. Using the inside emergency release lever, open the back door.
5. Have an assistant press and hold the back door handle switch.
6. While the assistant continues to hold the back door handle switch, turn ignition switch ON (DO NOT start
engine).
7. After approximately 5 seconds, the back door warning chime will sound for 0.5 seconds.
8. Release the back door handle switch.
9. Within 8 seconds of the back door warning chime sounding, press and hold the power liftgate switch.
10. After approximately 5 seconds, the back door warning chime will sound for 1 second.
11. Release the power liftgate switch.
12. The input signal check mode is now initialized.
The input signal check mode can test the following inputs. The back door warning chime will sound for approx-
imately 0.5 second each time a switch signal input oc curs. Use this test when one of these inputs is not
responding during normal automatic back door operation.
*Back door warning chime should sound as soon as vehicle moves.
Turn ignition switch OFF to end input signal check mode.
OPERATING CHECK MODE
Operating check mode allows self-diagnos is of the automatic back door system.
To activate operating check mode on the automatic back door, perform the following steps:
1. Turn ignition switch OFF.
2. Turn back door close switch to CANCEL (system cancelled).
3. Place A/T selector lever in P position.
4. Using the inside emergency release lever, open the back door.
5. Have an assistant press and hold the back door handle switch.
6. While the assistant continues to hold the back door handle switch, turn ignition switch ON (DO NOT start engine).
7. After approximately 5 seconds, the back door warning chime will sound for 0.5 second.
8. Release the back door handle switch.
Switch signal OperationRefer to
Power liftgate switch OFF → ONDLK-129
Back door close switch (CLOSE) OFF → ON DLK-131
Back door close switch (CANCEL) OFF → ON DLK-133
Back door handle switch OFF → ON DLK-140
A/T shift selector (park position switch) P position → other than P position DLK-101
Vehicle speed* Vehicle speedTM-50
Remote keyless entry signal Keyfob switch OFF → ON DLK-103
Door lock/unlock signal LOCK → UNLOCK DLK-74
Pinch strip LH signal OFF → ON DLK-135
Pinch strip RH signal OFF → ON DLK-135
Revision: April 20092010 QX56

DLK-148
< ECU DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
BCM (BODY CONTROL MODULE)
ECU DIAGNOSIS
BCM (BODY CONTROL MODULE)
Reference ValueINFOID:0000000005380581
VALUES ON THE DIAGNOSIS TOOL
Monitor Item
Condition Value/Status
AIR COND SW A/C switch OFF
OFF
A/C switch ON ON
AUT LIGHT SYS Outside of the room is dark
OFF
Outside of the room is bright ON
AUTO LIGHT SW Lighting switch OFF
OFF
Lighting switch AUTO ON
BACK DOOR SW Back door closed
OFF
Back door opened ON
CARGO LAMP SW Cargo lamp switch OFF
OFF
Cargo lamp switch ON ON
CDL LOCK SW Door lock/unlock switch does not operate
OFF
Press door lock/unlock switch to the LOCK side ON
CDL UNLOCK SW Door lock/unlock switch does not operate
OFF
Press door lock/unlock switch to the UNLOCK side ON
DOOR SW-AS Front door RH closed
OFF
Front door RH opened ON
DOOR SW-DR Front door LH closed
OFF
Front door LH opened ON
DOOR SW-RL Rear door LH closed
OFF
Rear door LH opened ON
DOOR SW-RR Rear door RH closed
OFF
Rear door RH opened ON
ENGINE RUN Engine stopped
OFF
Engine running ON
FR FOG SW Front fog lamp switch OFF
OFF
Front fog lamp switch ON ON
FR WASHER SW Front washer switch OFF
OFF
Front washer switch ON ON
FR WIPER LOW Front wiper switch OFF
OFF
Front wiper switch LO ON
FR WIPER HI Front wiper switch OFF
OFF
Front wiper switch HI ON
FR WIPER INT Front wiper switch OFF
OFF
Front wiper switch INT ON
FR WIPER STOP Any position other than front wiper stop position
OFF
Front wiper stop position ON
HAZARD SW When hazard switch is not pressed
OFF
When hazard switch is pressed ON
Revision: April 20092010 QX56

BCM (BODY CONTROL MODULE)DLK-149
< ECU DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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LIGHT SW 1ST Lighting switch OFF OFF
Lighting switch 1st
ON
HEAD LAMP SW1 Headlamp switch OFF
OFF
Headlamp switch 1st ON
HEAD LAMP SW2 Headlamp switch OFF
OFF
Headlamp switch 1st ON
HI BEAM SW High beam switch OFF
OFF
High beam switch HI ON
IGN ON SW Ignition switch OFF or ACC
OFF
Ignition switch ON ON
IGN SW CAN Ignition switch OFF or ACC
OFF
Ignition switch ON ON
INT VOLUME Wiper intermittent dial is in a dial position 1 - 7 1 - 7
I-KEY LOCK LOCK button of Intelligent Key is not pressed
OFF
LOCK button of Intelligent Key is pressed ON
I-KEY UNLOCK UNLOCK button of Intelligent Key is not pressed
OFF
UNLOCK button of Intelligent Key is pressed ON
KEY CYL LK-SW Door key cylinder LOCK position
ON
Door key cylinder other than LOCK position OF
KEY CYL UN-SW Door key cylinder UNLOCK position
ON
Door key cylinder other than UNLOCK position ON
KEY ON SW Mechanical key is removed from key cylinder
OFF
Mechanical key is inserted to key cylinder ON
OIL PRESS SW • Ignition switch OFF or ACC
• Engine running
OFF
Ignition switch ON ON
OPTICAL SENSOR Bright outside of the vehicle
Close to 5V
Dark outside of the vehicle Close to 0V
PASSING SW Other than lighting switch PASS
OFF
Lighting switch PASS ON
PUSH SW Return to ignition switch to LOCK position
OFF
Press ignition switch ON
REAR DEF SW Rear window defogger switch OFF
OFF
Rear window defogger switch ON ON
RR WASHER SW Rear washer switch OFF
OFF
Rear washer switch ON ON
RR WIPER INT Rear wiper switch OFF
OFF
Rear wiper switch INT ON
RR WIPER ON Rear wiper switch OFF
OFF
Rear wiper switch ON ON
RR WIPER STOP Rear wiper stop position
OFF
Other than rear wiper stop position ON
RR WIPER STP2 Rear wiper stop position
OFF
Other than rear wiper stop position ON
Monitor Item
Condition Value/Status
Revision: April 20092010 QX56

BCM (BODY CONTROL MODULE)DLK-171
< ECU DIAGNOSIS > [WITH INTELLIGENT KEY SYSTEM]
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DTC Inspection Priority ChartINFOID:0000000005380585
If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.
DTC IndexINFOID:0000000005380586
NOTE: Details of time display
• CRNT: Displays when there is a malfunction now or after returning to the normal condition until turning igni- tion switch OFF → ON again.
• 1 - 39: Displayed if any previous ma lfunction is present when current conditi on is normal. It increases like 1
→ 2 → 3...38 → 39 after returning to the normal condition whenever ignition switch OFF → ON. The counter
remains at 39 even if the number of cycles exceeds it. It is counted from 1 again when turning ignition switch
OFF → ON after returning to the normal condi tion if the malfunction is detected again.
Display contents of CONSULT Fail-safe Cancellation
U1000: CAN COMM CIRCUIT I nhibit engine crankingWhen the BCM re-establishes communication with the other mod-
ules.
Priority
DTC
1 • U1000: CAN COMM CIRCUIT
2 • B2190: NATS ANTENNA AMP
• B2191: DIFFERENCE OF KEY
• B2192: ID DISCORD BCM-ECM
• B2193: CHAIN OF BCM-ECM
• B2013: STRG COMM 1
• B2552: INTELLIGENT KEY
• B2590: NATS MALFUNCTION
3 • C1729: VHCL SPEED SIG ERR
• C1735: IGNITION SIGNAL
4 • C1708: [NO DATA] FL
• C1709: [NO DATA] FR
• C1710: [NO DATA] RR
• C1711: [NO DATA] RL
• C1712: [CHECKSUM ERR] FL
• C1713: [CHECKSUM ERR] FR
• C1714: [CHECKSUM ERR] RR
• C1715: [CHECKSUM ERR] RL
• C1716: [PRESSDATA ERR] FL
• C1717: [PRESSDATA ERR] FR
• C1718: [PRESSDATA ERR] RR
• C1719: [PRESSDATA ERR] RL
• C1720: [CODE ERR] FL
• C1721: [CODE ERR] FR
• C1722: [CODE ERR] RR
• C1723: [CODE ERR] RL
• C1724: [BATT VOLT LOW] FL
• C1725: [BATT VOLT LOW] FR
• C1726: [BATT VOLT LOW] RR
• C1727: [BATT VOLT LOW] RL
CONSULT display
Fail-safeIntelligent Key
warning lamp ON Tire pressure
monitor warning lamp ON Reference page
No DTC is detected.
further testing
may be required. ————
U1000: CAN COMM CIRCUIT ———BCS-32
B2190: NATS ANTENNA AMP ———SEC-31
Revision: April 20092010 QX56

DLK-210
< SYMPTOM DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
INTELLIGENT KEY SYSTEM SYMPTOMS
SYMPTOM DIAGNOSIS
INTELLIGENT KEY SYSTEM SYMPTOMS
Symptom TableINFOID:0000000005147032
ALL FUNCTIONS OF INTELLIGENT KEY SYSTEM DO NOT OPERATE
NOTE:
• Before performing the diagnosis in the following table, check “WORK FLOW”. Refer to
DLK-6, "
Work Flow".
• Check that vehicle is under the condition shown in “Conditions of vehicle” before starting diagnosis, and
check each symptom.
• If the following symptoms are detected, check syst ems shown in the “Diagnosis/service procedure” column
in this order.
Conditions of Vehicle (Operating Conditions)
• “ENGINE START BY I-KEY” and “LOCK/UNLOCK BY I-KEY” are ON when se tting on CONSULT-III.
• All doors are closed.
Symptom Diagnosis/service procedureReference page
All doors and ignition switch do not respond to
Intelligent Key command. 1. Check Intelligent Key function and battery inspection.
DLK-106
2. Check Intelligent Key unit power supply and ground circuit. DLK-68
3. Check remote keyless entry receiver.DLK-103
4. Check BCM power supply and ground circuit. DLK-68
5. Replace Intelligent Key unit.DLK-106
Revision: April 20092010 QX56