2009 INFINITI QX56 check engine

QUICK REFERNCE CHART: QX56
2010
Unit: mm (in)
*: Always check with the Parts Department for the latest parts information
Front Wheel Alignment (Unladen*1)INFOID:0000000005987161
*1: Fuel, radiator coolant and engine oil full. Spare tire, jack, hand tools and mats in designated positions.
*2: Target value 37° 31 ′ (37.52 °)
*3: Target value 33 ° 59 ′ (33.98 °)
*4: Target value 37 ° 44 ′ (37.73 °)
*5: Target value 33 ° 29 ′ (33.48 °)
*6 Some vehicles may not be equipped with straight (non-adjustable) lower link bolts and washers. In order to adjust camber and caster
on these vehicles, first replace the lower link bolts and washers with adjustable (cam) bolts and washers Make
NGK
Model Standard model
Standard type* DILFR5A-11
Gap (Nominal) 1.1 (0.043)
Drive type2WD 4WD
Camber*6
Degree minute (decimal degree) Minimum -0
° 51 ′ (-0.85 °)-0 ° 33 ′ (-0.55 °)
Nominal -0 ° 6 ′ (-0.10 °)0 ° 12 ′ (0.20 °)
Maximum 0 ° 39 ′ (0.65 °)0 ° 57 ′ (0.95 °)
Cross camber 0 ° 45 ′ (0.75 °) or less 0 ° 45 ′ (0.75 °) or less
Caster
Degree minute (decimal degree) Minimum 3
° 15 ′ (3.25 °)2 ° 45 ′ (2.75 °)
Nominal 4 ° 0 ′ (4.00 °)3 ° 30 ′ (3.50 °)
Maximum 4 ° 45 ′ (4.75 °)4 ° 15 ′ (4.25 °)
Cross caster 0 ° 45 ′
(0.75 °) or less 0 ° 45 ′ (0.75 °) or less
Kingpin inclination
Degree minute (decimal degree) 13
° 32 ′ (13.53 °)13 ° 13 ′ (13.22 °)
Total toe-in Distance (A
− B) Minimum 1.8 mm (0.07 in) 1.8 mm (0.07 in)
Nominal 2.8 mm (0.11 in) 2.8 mm (0.11 in)
Maximum 3.8 mm (0.15 in) 3.8 mm (0.15 in)
Angle (left side or right side)
Degree minute (decimal degree) Minimum 0
° 3 ′ (0.05 °)0 ° 3 ′ (0.05 °)
Nominal 0 ° 5 ′ (0.08 °)0 ° 5 ′ (0.08 °)
Maximum 0 ° 7 ′ (0.12 °)0 ° 7 ′ (0.12 °)
Wheel turning angle
(full turn) Inside
Degree minute (decimal degree)
34
° 31 ′ – 38 ° 31 ′ *2
(34.52 ° – 38.52 °) 34
° 44 ′ – 38 ° 44 ′ *4
(34.73 ° – 38.73
° )
Outside
Degree minute (decimal degree) 30
° 59 ′ – 34 ° 59 ′ *3
(30.98 ° – 34.98 °) 30
° 29 ′ – 34 ° 29 ′ *5
(30.48 ° – 34.48 °)
SFA234AC

ACCELERATOR CONTROL SYSTEMACC-5
< REMOVAL AND INSTALLATION >
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4. Disconnect the adjustable pedal electric motor electrical connec-
tor.
5. Disconnect the adjustable pedal electric motor memory electri- cal connector.
6. Disconnect the accelerator position sensor electrical connector.
7. Remove the two upper and one lower accelerator pedal nuts.
8. Remove the adjustable accelerator pedal assembly. CAUTION:
• Do not disassemble the accelerator pedal assembly.
• Do not remove the accelerator pedal position sensor fromthe accelerator pedal bracket.
• Do not disassemble the accelerator pedal adjusting mechanism.
• Avoid damage from dropping the acceler ator pedal assembly during handling.
• Keep the accelerator pedal assembly away from water.
INSTALLATION
Installation is in the reverse order of removal.
INSPECTION AFTER INSTALLATION
• Check that the accelerator pedal move s smoothly within the specified ranges.
• Depress and release the accelerator pedal to check that it returns smoothly to the original released position.
• Perform an electrical inspection of the accelerator pedal position sensor. Refer to EC-188, "
Component
Inspection".
CAUTION:
When the harness connector of the accelerator pedal position sensor is disco\
nnected, perform
“Accelerator Pedal Released Position Learning”. Refer to EC-63, "
CONSULT-III Function (ENGINE)".
LBIA0380E
Adjustable accelerator pedal – total pedal applied stroke : 48.3 mm (1.90 in)
Adjustable accelerator pedal – total pedal adjustment travel : 73.2 mm (2.88 in)
Revision: December 20092009 QX56

AV-28
< FUNCTION DIAGNOSIS >[AUDIO SYSTEM]
DIAGNOSIS SYSTEM (AV CONTROL UNIT)
OPERATION PROCEDURE
1. Start the engine.
2. Turn the audio system off.
3. While pressing the “SETTING” button, turn the volume control
dial counterclockwise 30 clicks or more.
CONFIRMATION/
ADJUSTMENT Display diagnosis
Color spectrum bar Color tone of the screen can be checked by the display of a color bar.
Gradation bar Shading of the screen can be checked by the display of a gray scale.
Touch panel
• Touch panel calibration
• Touch panel response check
Vehicle signals The following vehicle signals are analyzed: Vehicle speed signal, park-
ing brake signal, light signal, ignition switch signal, and reverse signal.
Speaker test Connection can be checked by sending a test tone to each speaker.
Navigation Steering angle ad-
justment
Confirm/adjust the steering angle when there is a difference between
the displayed vehicle mark turning angle and actual.
Speed calibration Confirm/adjust the speed calibration when there is a difference between
the displayed vehicle mark location and actual.
XM SAT subscrip-
tion status Check the subscription status of the XM NAV Traffic subsription.
Error history Diagnosis results previously stored in the memory are displayed in this
mode.
Synchronize FES clock Turns FES (Familly Entertainment System) clock synchronization func-
tion ON/OFF.
Vehicle CAN diagnosis The transmitting/receiving of CAN communication can be monitored.
AV COMM diagnosis The transmitting/receiving of AV communication can be monitored.
Handsfree phone Handsfree volume
adjustment
Adjust handsfree volume (low, medium, high).
Voice microphone
test Test microphone operation.
Delete handsfree
memory Erase handsfree system memory.
Bluetooth Confirm/Change
passkey
Confirm and change the Bluetooth passkey
Confirm/Change
device name Confirm and change a device name stored in Bluetooth.
SAT Change channel
Any necessary channels required to recieve traffic information from the
satellite radio system can be set.
Change applica-
tion ID Any application ID’s required to recieve traffic information from the sat-
ellite radio system can be set.
Diag Not used.
Delete unit connection log Erase the error history and connection history of the unit.
Initialize settings All audio settings are reset to default levels.
Mode
Description
ALNIA0446GB
Revision: December 20092009 QX56

AV
NORMAL OPERATING CONDITIONAV-157
< SYMPTOM DIAGNOSIS > [AUDIO SYSTEM]
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NORMAL OPERATING CONDITION
DescriptionINFOID:0000000003776899
AUDIO SYSTEM
The majority of the audio troubles are the result of outside causes (bad CD, electromagnetic interference,
etc.).
Noise
The following noise results from variations in field strength, such as fading noise and multi-path noise, or
external noise from trains and other sources. It is not a malfunction.
• Fading noise: This noise occurs because of variations in the field strength in a narrow range due to moun-
tains or buildings blocking the signal.
• Multi-path noise: This noise results from the waves sent directly from the broadcast station arriving at the antenna at a different time from the waves which reflect off mountains or buildings.
The vehicle itself can be a source of noise if noise prevention parts or electrical equipment is malfunctioning.
Check if noise is caused and/or changed by engine speed, ignition switch turned to each position, and opera-
tion of each piece of electrical equipment, and determine the cause.
NOTE:
The source of the noise can be found easily by listening to the noise while removing the fuses of electrical
components, one by one.
Type of Noise and Possible Cause
NAVIGATION SYSTEM
Basic Operation
Vehicle Mark
Occurrence condition Possible cause
Occurs only when engine is ON. A continuous growling noise occurs. The speed of
the noise varies with changes in the engine speed. • Ignition components
The occurrence of the noise is linked with the operation of the fuel pump. • Fuel pump condenser
Noise only occurs when various
electrical components are oper-
ating. A cracking or snapping sound occurs with the op-
eration of various switches.
• Relay malfunction, audio unit malfunction
The noise occurs when various motors are operat-
ing. • Motor case ground
•Motor
The noise occurs constantly, not just under certain conditions. • Rear defogger coil malfunction
• Open circuit in printed heater
• Poor ground of antenna feeder line
A cracking or snapping sound occurs while the vehicle is being driven, especially when
it is vibrating excessively. • Ground wire of body parts
• Ground due to improper part installation
• Wiring connections or a short circuit
Symptom
Cause Remedy
No image is shown. Display brightness adjustment is set fully to DARK
side. Adjust the display brightness.
No guide sound is heard.
Audio guide volume is too low or
too high. Volume control is set to OFF, MIN or MAX. Adjust the audio guide volume.
Audio guidance is not available while the vehicle is
driving on a dark pink route.
System is not malfunctioning.
Screen is too dark.
Motion of the image is too slow. Temperature inside the vehicle is low.
Wait until the temperature inside the vehicle
reaches the proper temperature.
Small black or bright spots appear
on the screen. Symptom peculiar to a liquid crystal display (dis-
play unit). System is not malfunction.
Revision: December 20092009 QX56

BCS
BCM (BODY CONTROL MODULE)BCS-51
< ECU DIAGNOSIS > [BCM]
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DTC Inspection Priority ChartINFOID:0000000003776424
If some DTCs are displayed at the same time, per
form inspections one by one based on the following priority
chart.
DTC IndexINFOID:0000000003776425
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.
U1010: CONTROL UNIT (CAN) Inhibit engine cranking When the BCM re-start communicating with the other modules.
Priority DTC
1  U1000: CAN COMM CIRCUIT
 U1010: CONTROL UNIT (CAN)
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  C1704: LOW PRESSURE FL
 C1705: LOW PRESSURE FR
 C1706: LOW PRESSURE RR
 C1707: LOW PRESSURE RL
 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
Revision: December 20092009 QX56

BR-14
< BASIC INSPECTION >
BRAKE TUBE AND HOSE
1. Check brake lines (tubes and hoses) and connections for fluid leaks, damage, twists, deformation, con-
tacts with other parts, and loose connections. Replace any parts as necessary. Refer to BR-21, "
Removal
and Installation of Front Brake Piping and Brake Hose".
2. While depressing brake pedal under a force of 785 N (80 kg-f, 177 lb-f) with engine running for approxi- mately 5 seconds, check each part for fluid leaks.
REAR BRAKE
REAR BRAKE : InspectionINFOID:0000000003772423
INSPECTION AFTER REMOVAL
CAUTION:
Brake tubes and hoses are important safety parts. Always disassemble the parts and retighten their fit-
tings, if a brake fluid leak is detected. Replace appl icable part with a new one, if damaged part is
detected.
1. Check brake lines (tubes and hoses) and connections fo r fluid leaks, damage, twists, deformation, con-
tacts with other parts, and loose connections. Replace any parts as necessary. Refer to BR-22, "
Removal
and Installation of Rear Brake Piping and Brake Hose".
2. While depressing brake pedal under a force of 785 N (80 kg-f, 177 lb-f) with engine running for approxi- mately 5 seconds, check each part for fluid leaks.
Revision: December 20092009 QX56

BR-24
< ON-VEHICLE REPAIR >
BRAKE TUBE AND HOSE
1. Check brake lines (tubes and hoses), and connections for fluid leaks, damage, twist, deformation, contact
with other parts, and loose connections. Replace any parts as necessary. Refer to BR-13, "
Hydraulic Cir-
cuit".
2. While depressing brake pedal under a force of 785 N (80 kg-f, 177 lb-f) with engine running for approxi- mately 5 seconds, check each part for fluid leaks.
Revision: December 20092009 QX56

BR-28
< ON-VEHICLE REPAIR >
VACUUM LINES
VACUUM LINES
Removal and InstallationINFOID:0000000003772441
REMOVAL
1. Remove engine room cover.
2. Disconnect vacuum hose from hose clip.
3. Release clamps and disconnect vacuum hose.
4. Remove check valve from brake booster.
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
• Insert vacuum hose for at least 24 mm (0.94 in).
• Do not use lubricating oil during assembly.
1. Hose clip2. Clamp3. Vacuum hose
4. Check valve
LFIA0216E
SBR225B
Revision: December 20092009 QX56