2009 INFINITI QX56 ignition

SEC-104
< SYMPTOM DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
INTELLIGENT KEY SYSTEM/ENGIN
E START FUNCTION SYMPTOMS
SYMPTOM DIAGNOSIS
INTELLIGENT KEY SYSTEM/ENGINE START FUNCTION SYMPTOMS
Symptom TableINFOID:0000000003775944
NOTE:
• Before performing the diagnosis in the following table, check “ SEC-3, "
Work Flow"”.
• Check that vehicle is under the condition shown in “Conditions of vehicle” before starting diagnosis, and check each symptom.
• Engine cranking is enabled when the shift lever is in the "Park" position, and in the "Neutral" position only if
the brake pedal is depressed.
• 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 function is ON when setting on CONSULT-III.
• Mechanical key is not inserted in key cylinder.
• One or more of Intelligent Keys with registered Intelligent Key ID is in the vehicle.
Symptom Diagnosis/service procedureReference
page
Ignition switch does not turn on with Intelligent Key.
[LCD displays "KEY DETECTED"] 1. Check steering lock solenoid.
DLK-99
2. Replace Intelligent Key unit.SEC-111
Ignition switch does not turn on with Intelligent Key.
[LCD does not display "PUSH" with arrow toward key
cylinder] 1. Check Intelligent Key unit power supply and ground circuit.
DLK-682. Check ignition knob switch.DLK-116
3. Check key switch (BCM input).DLK-115
4. Check key switch (Intelligent Key unit input).DLK-113
5. Replace Intelligent Key unit.SEC-111
Ignition switch does not turn on with Intelligent Key.
[LCD displays " NO KEY"]1a. Check inside key antenna 1 (rear of center console).
DLK-60
1b. Check inside key antenna 2 (luggage compartment).DLK-62
1c. Check inside key antenna 3 (front of center console).DLK-64
1d. Check inside key antenna 4 (overhead console area).DLK-68
2. Replace Intelligent Key unit.SEC-111
Ignition switch does not turn on with mechanical key1. Check key switch (BCM input).
DLK-1152. Check key switch (Intelligent Key unit input).DLK-113
Engine cannot be cranked with transmission in "Park"
or in "Neutral" position with brake pedal depressed.1. Check transmission signal.
TM-44
2. Check stop lamp switch.EXL-91
Revision: December 20092009 QX56

SEC-106
< SYMPTOM DIAGNOSIS >[WITH INTELLIGENT KEY SYSTEM]
INFINITI VEHICLE IMMOBILI
ZER SYSTEM-NATS SYMPTOMS
INFINITI VEHICLE IMMOBILIZER SYSTEM-NATS SYMPTOMS
Symptom TableINFOID:0000000003775946
NOTE:
• Before performing the diagnosis in the following table, check “ SEC-3, "
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)
• Mechanical key is not inserted into key cylinder.
• Ignition knob switch is not depressed.
Symptom Diagnosis/service procedure Reference page
Security indicator does not turn ON or flash. 1. Check vehicle security indicator
SEC-47
2. Check Intermittent Incident GI-38
Revision: December 20092009 QX56

PRE-INSPECTION FOR DIAGNOSTICSEC-107
< ON-VEHICLE MAINTENANCE > [WITH INTELLIGENT KEY SYSTEM]
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ON-VEHICLE MAINTENANCE
PRE-INSPECTION FOR DIAGNOSTIC
Basic InspectionINFOID:0000000003775947
The engine start function, door lock function, power distribution system and NATS-IVIS/NMS in the Intelligent
Key system are closely related to each other regarding control. Narrow down the functional area in question
by performing basic inspection to i dentify which function is malfunctioning. The vehicle security function can
operate only when the door lock and power distribution system are operating normally. Therefore, it is easy to
identify any factor unique to the vehicle security system by performing the vehicle security operation check
after basic inspection.
1.CHECK DOOR LOCK OPERATION
Check the door lock for normal operation with the Intelligent Key controller and door request switch.
Successful door lock operation with the Intelligent Key and request SW indicates that the remote keyless entry
receiver and inside key antenna required for engine start are functioning normally.
Identify the malfunctioning point by referring to the DLK section if the door cannot be unlocked.
Can the door be locked with the Intelligent Key and door request switch?
YES >> GO TO 2.
NO >> Refer to DLK-206, "
Symptom Table".
2.CHECK ENGINE STARTING
Checks that the engine starts when operating the Intelligent Key.
Does the engine start?
YES >> GO TO 3.
NO >> Refer to SEC-104, "
Symptom Table".
3.CHECK STEERING LOCKING
Does the steering lock when operating door switch after switching the power supply from ON position (or ACC
position) to LOCK position?
If door switch is malfunctioning, BC M cannot lock the steering. If BCM does not detect DTC, steering lock unit
is normal.
Does steering lock?
YES >> GO TO 4.
NO >> Refer to DLK-71, "
ComponentFunctionCheck".
4.CHECK IGNITION KNOB SWITCH OPERATION
Press ignition knob to check switch operation.
Does the combination meter display any message?
YES >> GO TO 5.
NO >> Refer to SEC-42, "
Ignition Knob Switch Check".
5.CHECK VEHICLE SECURITY SYSTEM
Check the vehicle security system for normal operation.
The vehicle security function can operate only when t he door lock and power distribution functions are operat-
ing normally.
Therefore, it is easy to identify any factor unique to the vehicle security by performing the vehicle security
operation check after this basic inspection.
>> Go to SEC-107, "
Vehicle Security Operation Check".
Vehicle Security Operation CheckINFOID:0000000003775948
1.INSPECTION START
Turn ignition switch “OFF”.
NOTE:
Before starting operation check, open front windows.
Revision: December 20092009 QX56

PRECAUTIONSSEC-109
< PRECAUTION > [WITH INTELLIGENT KEY SYSTEM]
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PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005852251
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severi ty of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and w hether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SR and SB section of this Service Man-
ual.
WARNING:
• To avoid rendering the SRS inoper ative, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintentional act ivation of the system. For removal of Spiral Cable and Air Bag
Module, see the SR section.
• Do not use electrical test equipm ent on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
• When working near the Airbag Diagnosis Sensor Un it or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or el ectric power tools or strike near the sensor(s) with a
hammer. Heavy vibration could activate the sensor( s) and deploy the air bag(s), possibly causing
serious injury.
• When using air or electric power tools or hammers, always switch the Ignition OFF, disconnect the battery, and wait at least 3 minutes before performing any service.
Precaution Necessary for Steering Wheel Rotation After Battery Disconnect
INFOID:0000000005852252
NOTE:
• This Procedure is applied only to models with Intelligent Key system and NATS (NISSAN ANTI-THEFT SYS-
TEM).
• Remove and install all control units after disconnecti ng both battery cables with the ignition knob in the
″ LOCK ″ position.
• Always use CONSULT-III to perform self-diagnosis as a part of each function inspection after finishing work.
If DTC is detected, perform trouble diagnosis according to self-diagnostic results.
For models equipped with the Intelligent Key system and NATS , an electrically controlled steering lock mech-
anism is adopted on the key cylinder.
For this reason, if the battery is disconnected or if the battery is discharged, the steering wheel will lock and
steering wheel rotation will become impossible.
If steering wheel rotation is required when battery power is interrupted, follow the procedure below before
starting the repair operation.
OPERATION PROCEDURE
1. Connect both battery cables. NOTE:
Supply power using jumper cables if battery is discharged.
2. Use the Intelligent Key or mechanical key to turn the ignition switch to the ″ACC ″ position. At this time, the
steering lock will be released.
3. Disconnect both battery cables. The steering lock will remain released and the steering wheel can be
rotated.
4. Perform the necessary repair operation.
Revision: December 20092009 QX56

SEC-110
< PRECAUTION >[WITH INTELLIGENT KEY SYSTEM]
PRECAUTIONS
5. When the repair work is completed, return the ignition switch to the
″LOCK ″ position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.)
6. Perform a self-diagnosis check of a ll control units using CONSULT-III.
Revision: December 20092009 QX56

SN
INSPECTION AND ADJUSTMENTSN-5
< BASIC INSPECTION >
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INSPECTION AND ADJUSTMENT
Preliminary CheckINFOID:0000000003776738
DESCRIPTION
The purpose of the sonar sensor preliminary check is to confirm that there are no outside factors affecting the
sonar system.
CONDITIONS
• Ignition switch ON
• No obstructions within 3.0 m (10 ft.) of sonar sensors
SONAR SENSOR STATUS CHECK
• Check that the sonar sensors are properly aligned (no deformation in sensor mounting areas).
• Check that snow, mud or other foreign obj ects are not adhering to the sonar sensors.
• Check that there is no deformation, scratc hes or other damage to the sonar sensors.
• Check that water has not accu mulated in the sonar sensors.
CAUTION:
Use water, cotton swab, or other soft material for cleaning the sensors.
1. Check that there are no obstacles wit hin each sonar sensor's detection range.
2. Check that there are no nearby ultrasound sources such as the sounds of vehicle horns, motorcycle
engines or truck air brakes.
3. Check that the vehicle is on a level surface.
Sonar sensors Detection range
Front Approx. 1.0 m (3 ft.) maximum
Rear Approx. 1.8 m (5.9 ft.) maximum
Revision: December 20092009 QX56

SN-6
< FUNCTION DIAGNOSIS >
REAR SONAR SYSTEM
FUNCTION DIAGNOSIS
REAR SONAR SYSTEM
System DiagramINFOID:0000000004173795
System DescriptionINFOID:0000000004173796
FUNCTION
With power and ground supplied, transmission gear selector lever in R position, and the rear sonar system
OFF switch ON, the rear sonar system will detect obstacles within 1.8 m (5.9 ft.) of the rear sonar sensors. The
vehicle operator is notified of obstacles by varied rate of tone from the sonar buzzer depending on distance of
obstacle being sensed.
REAR SONAR SYSTEM OFF SWITCH
With power and ground supplied to the sonar control unit, transmission gear selector lever in R position, the
sonar system can be disabled and the sonar buzzer silenced by momentarily pressing the rear sonar system
OFF switch. The sonar system OFF indicator lamp will be illuminated in the rear sonar system OFF switch.
The rear sonar system and buzzer will be disabled and t he sonar system OFF indicator will be illuminated until
the ignition switch is turned OFF. When the ignition switch is turned ON, the rear sonar system will be
enabled. Depressing the rear sonar system OFF s witch again will enable the rear sonar system also.
Enabling the rear sonar system will cause the rear sonar system OFF indicator to go out. If the indicator light
is blinking there is a malfunction in the system.
SONAR BUZZER
With power and ground supplied to the sonar control unit and the A/T selector lever in R position, a stationary
object that is at least 7.0 cm (2.8 in.) wide and 1.0 m (39. 0 in.) tall and that is closer than 1.8 m (5.9 ft.) will be
detected by the rear sonar sensors, causing the sonar buzzer to sound a tone. As the vehicle moves closer to
the object, the rate of the tone will increase. When the object is less than 25.0 cm (10 in.) from the rear
bumper, the tone will sound continuously.
REAR SONAR SENSORS
With power and ground supplied to the rear sonar sens ors, the sonar sensors transmit an ultrasonic signal.
This signal is reflected back to the sensor by objects large enough and close enough to be detected. The rear
sonar sensors measure the time from the transmitted si gnal to the time the signal is reflected back and sends
this information to the sonar control unit.
BACK-UP LAMP RELAY
The back-up lamp relay provides a reverse signal to the sonar control unit.
AWNIA1499GB
Revision: December 20092009 QX56

SN-8
< FUNCTION DIAGNOSIS >
REAR SONAR SYSTEM
1. Turn ignition switch ON. Rear sonar system OFF switch indica-tor lamp illuminates for three seconds and then turns off.
2. Immediately push rear sonar system OFF switch ten times within five seconds.
3. The sonar buzzer will sound once and the sonar system OFF indicator will flash once.
REQUESTING NUMBER OF FAULT CODES MODE
1. While in "entering diagnostic mode", push rear sonar system
OFF switch once within 30 seconds of entering diagnostic
mode.
NOTE:
If the number of fault codes is not requested within 30 seconds
after entering diagnostic mode, the system will return to regular
operation mode.
2. The sonar buzzer will sound once.
3. Sonar system OFF indicator will flash once and sonar buzzer will sound once for each fault code detected.
4. There will be a four second pause.
5. The number of fault codes will repeat five times then pause. NOTE:
Self-diagnosis will exit unless "requesting faul t codes mode" occurs before five repeats ends.
REQUESTING FAULT CODES MODE
1. While in "requesting number of fault codes" mode, push rear
sonar system OFF switch once.
2. The sonar buzzer will sound once.
3. Sonar system OFF indicator will flash and sonar buzzer will sound the first digit of the fault code followed by a one second
pause.
4. Sonar system OFF indicator will flash and sonar buzzer will sound the second digit of the fault code followed by a four sec-
ond pause.
5. Each fault code will repeat five times then pause.
6. Write down each fault code. Then, acknowledge the fault code by pushing the rear sonar system OFF s witch once (the sonar buzzer may sound).
NOTE:
"Requesting fault codes mode" will exit unless the f ault code is acknowledged before it is repeated five
times. When all fault codes have been indicated, "clearing fault codes mode" will be entered. Refer to
SN-30, "
DTC Index".
CLEARING FAULT CODES MODE
NOTE:
While in "clearing fault codes mode", self-diagnosis will automatically exit if no activity occurs for 30 seconds.
LKIA0389E
LKIA0388E
LKIA0390E
Revision: December 20092009 QX56