ECU INFINITI QX56 2010 Factory Service Manual
[x] Cancel search | Manufacturer: INFINITI, Model Year: 2010, Model line: QX56, Model: INFINITI QX56 2010Pages: 4210, PDF Size: 81.91 MB
Page 2266 of 4210
SERVICE INFORMATION FOR ELECTRICAL INCIDENTGI-43
< BASIC INSPECTION >
C
DE
F
G H
I
J
K L
M B
GI
N
O P
• When inspecting a ground connection follow these rules:
- Remove the ground bolt or screw.
- Inspect all mating surfaces for tarnish, dirt, rust, etc.
- Clean as required to assure good contact.
- Reinstall bolt or screw securely.
- Inspect for “add-on” accessories which may be interfering with the ground circuit.
- If several wires are crimped into one ground eyelet terminal, check for proper crimps. Make sure all of the wires are clean, securely fastened and providing a good ground path. If multiple wires are cased in one eye-
let make sure no ground wires have excess wire insulation.
• For detailed ground distribution information, refer to “Ground Distribution” in PG section.
VOLTAGE DROP TESTS
• Voltage drop tests are often used to find components or circuits which have excessive resistance. A voltage drop in a circuit is caused by a resistance when the circuit is in operation.
• Check the wire in the illustration. When measuring re sistance with DMM, contact by a single strand of wire
will give reading of 0 ohms. This would indicate a good circuit. When the circuit operates, this single strand
of wire is not able to carry the current. The single strand will have a high resistance to the current. This will
be picked up as a slight voltage drop.
• Unwanted resistance can be caused by many situations as follows:
- Undersized wiring (single strand example)
- Corrosion on switch contacts
- Loose wire connections or splices.
• If repairs are needed always use wire that is of the same or larger gauge.
Measuring Voltage Drop — Accumulated Method
• Connect the DMM across the connector or part of the ci rcuit you want to check. The positive lead of the
DMM should be closer to power and the negative lead closer to ground.
• Operate the circuit.
• The DMM will indicate how many volts are being used to “push” current through that part of the circuit.
SGI853
Revision: April 20092010 QX56
Page 2269 of 4210
GI-46
< BASIC INSPECTION >
CONSULT-III CHECKING SYSTEM
CONSULT-III CHECKING SYSTEM
DescriptionINFOID:0000000005149609
• When CONSULT-III is connected with a data link connectorequipped on the vehicle side, it will communicate with the control
unit equipped in the vehicle and then enable various kinds of diag-
nostic tests.
• Refer to “CONSULT-III Operation Manual” for more information.
Function and System ApplicationINFOID:0000000005149610
1 : Hood release handle
2 : Data link connector
ALBIA0047ZZ
Diagnostic test mode Function
ENGINE
TRANSMISSION
ICC
*1
ABS
AIR BAG
IPDM E/R
BCM
METER/M&A
INTELLIGENT KEY
AUTO DRIVE POS.
REARVIEW CAMERA
AIR LEVELIZER MULTI AV
ALL MODE AWD/4WD
*2
HVAC
SONAR
*3
Work support This mode enables a technician to adjust some devices
faster and more accurately by following the indications on
CONSULT-III. x- x x- - x- xxxx- x - -
Self-diagnostic Self-diagnostic can be performed quickly. ----x-----------
Self-diagnostic re-
sults Self-diagnostic results can be read and erased quickly. x x x x - x x x x x - x x x x x
Trouble diagnostic
record Current self-diagnostic results and all trouble diagnostic
records previously stored can be read.
--- - x--- - -------
Data monitor Input/Output data in the ECM can be read. xxx x- x- xxxxxxx xx
Data monitor (spec) Data monitor specification can be read. x---------------
CAN diagnosis The condition of CAN communication can be indicated by
a topology.
xxx xxxxxxx- - xx x-
CAN diagnosis sup-
port monitor The communication condition of CAN communication line
can be read.
xxx x- xxxxx- - xx x-
Active test Diagnostic Test Mode in wh
ich CONSULT-III drives some
actuators apart from the ECMs and also shifts some pa-
rameters in a specified range. x-xx-x--xx-x- - --
Function test This mode can show results of self-diagnosis of ECU with
either “OK” or “NG”. For engines, more practical tests re-
garding sensors/switches and/or actuators are available.
xxxxx---x-------
DTC & SRT confir-
mation The results of SRT (System Readiness Test) and the self-
diagnosis status/result can be confirmed.
x-x-----x-------
DTC work support The operating condition to confirm Diagnosis Trouble
Codes can be selected. xxx-----x-------
ECM/ECU part num-
ber ECM/ECU part number can be read.
xxx x- - x- xxxxxx xx
ECU discriminated
No. Classification number of a replacement ECU can be read
to prevent an incorrect ECU from being installed.
----x-----------
Revision: April 20092010 QX56
Page 2270 of 4210
CONSULT-III CHECKING SYSTEMGI-47
< BASIC INSPECTION >
C
DE
F
G H
I
J
K L
M B
GI
N
O P
x : Applicable
*1: With intelligent cruise control
*2: With 4-wheel drive
*3: With front and rear sonar system
*4: With security card installed
CONSULT-III Data Link Connector (DLC) CircuitINFOID:0000000005149611
INSPECTION PROCEDURE
If the CONSULT-III cannot diagnose the sys tem properly, check the following items.
NOTE:
The CAN and DDL2 circuits from DLC pins 6, 7 and 14 may be connected to more than one system. A short in
any circuit connected to a control unit in one system may affect CONSULT-III access to other systems.
Passenger AirbagDisplays the STATUS (readiness) of the front passenger
air bag. ----x-----------
AV COMM monitor The condition of AV communication can be indicated. ------------x---
Configuration Sets control module parameters to match vehicle options.------x---------
PIN read
*4This mode shows the BCM-specific 5-digit code. ------x---------
Control unit
initialization
*4All registered ignition key IDs in NATS components can be
initialized and new IDs can be registered. ------x---------
Diagnostic test
mode Function
ENGINE
TRANSMISSION
ICC
*1
ABS
AIR BAG
IPDM E/R BCM
METER/M&A
INTELLIGENT KEY
AUTO DRIVE POS.
REARVIEW CAMERA AIR LEVELIZER MULTI AV
ALL MODE AWD/4WD
*2
HVAC
SONAR
*3
Symptom Check item
CONSULT-III cannot access
any system. • CONSULT-III DLC power supply circuit (Terminal 8) and ground circuit (Terminal 4)
CONSULT-III cannot access in-
dividual system. (Other sys-
tems can be accessed.) • Power supply and ground circuit for the control unit of the system (For detailed circuit, refer to wiring
diagram for each system.)
• Open or short circuit between the system and CONSULT-III DLC (For detailed circuit, refer to wiring
diagram for each system.)
• Open or short circuit CAN communication line. Refer to LAN-14, "
Trouble Diagnosis Flow Chart".
Revision: April 20092010 QX56
Page 2272 of 4210
GW-1
BODY EXTERIOR, DOORS, ROOF & VEHICLE SECURITY
C
DE
F
G H
I
J
L
M
SECTION GW
A
B
GW
N
O P
CONTENTS
GLASS & WINDOW SYSTEM
SYMPTOM DIAGNOSIS ..... ..........................2
SQUEAK AND RATTLE TROUBLE DIAGNO-
SIS .................................................................. .....
2
Work Flow ........................................................... ......2
Generic Squeak and Rattle Troubleshooting ............4
Diagnostic Worksheet ...............................................6
PRECAUTION ...............................................8
PRECAUTIONS .............................................. .....8
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ......
8
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect ............................... ......
8
Handling for Adhesive and Primer ............................9
PREPARATION ...........................................10
PREPARATION .................................................10
Special Service Tool ............................................ ....10
Commercial Service Tool ........................................10
ON-VEHICLE REPAIR .................................11
WINDSHIELD GLASS .......................................11
Removal and Installation ..................................... ....11
REAR WINDOW GLASS AND MOLDING ........13
Removal and Installation .........................................13
FRONT DOOR GLASS AND REGULATOR .....15
Removal and Installation .........................................15
REAR DOOR GLASS AND REGULATOR .......18
Removal and Installation .........................................18
SIDE WINDOW GLASS ....................................21
Removal and Installation .........................................21
Revision: April 20092010 QX56
Page 2274 of 4210
SQUEAK AND RATTLE TROUBLE DIAGNOSISGW-3
< SYMPTOM DIAGNOSIS >
C
DE
F
G H
I
J
L
M A
B
GW
N
O P
If possible, drive the vehicle with the customer until the noise is duplicated. Note any additional information on
the Diagnostic Worksheet regarding the conditions or lo cation of the noise. This information can be used to
duplicate the same conditions when you confirm the repair.
If the noise can be duplicated easily during the test drive, to help identify the source of the noise, try to dupli-
cate the noise with the vehicle stopped by doing one or all of the following:
1) Close a door.
2) Tap or push/pull around the area where the noise appears to be coming from.
3) Rev the engine.
4) Use a floor jack to recreate vehicle “twist”.
5) At idle, apply engine load (electrical load, half- clutch on M/T model, drive position on A/T model).
6) Raise the vehicle on a hoist and hit a tire with a rubber hammer.
• Drive the vehicle and attempt to duplicate the conditions the customer states exist when the noise occurs.
• If it is difficult to duplicate the noise, drive the vehicle slowly on an undulating or rough road to stress the vehicle body.
CHECK RELATED SERVICE BULLETINS
After verifying the customer concern or symptom, check ASIST for Technical Service Bulletins (TSBs) related
to that concern or symptom.
If a TSB relates to the symptom, follow the procedure to repair the noise.
LOCATE THE NOISE AND IDENTIFY THE ROOT CAUSE
1. Narrow down the noise to a general area.To help pinpoint the source of the noise, use a listening tool (Chassis Ear: J-39570, Engine Ear: J-39565 and mechanic's stethoscope).
2. Narrow down the noise to a more specific area and identify the cause of the noise by:
• removing the components in the area that you suspect the noise is coming from. Do not use too much force when removing clips and fasteners, otherwise clips and fasteners can be broken
or lost during the repair, resulting in the creation of new noise.
• tapping or pushing/pulling the component that you suspect is causing the noise.
Do not tap or push/pull the component with excessive force, otherwise the noise will be eliminated only tem-
porarily.
• feeling for a vibration with your hand by touching the component(s) that you suspect is (are) causing the
noise.
• placing a piece of paper between components that you suspect are causing the noise.
• looking for loose components and contact marks. Refer to GW-4, "
Generic Squeak and Rattle Troubleshooting".
REPAIR THE CAUSE
• If the cause is a loose component, tighten the component securely.
• If the cause is insufficient clearance between components:
- separate components by repositioning or loos ening and retightening the component, if possible.
- insulate components with a suitable insulator such as urethane pads, foam blocks, felt cloth tape or urethane tape. A NISSAN Squeak and Rattle Kit (J-43980) is available through your authorized NISSAN Parts Depart-
ment.
CAUTION:
Do not use excessive force as many components are constructed of plastic and may be damaged.
Always check with the Parts Department for the latest parts information.
The following materials are contained in the NISSAN Squeak and Rattle Kit (J-43980). Each item can be
ordered separately as needed.
URETHANE PADS [1.5 mm (0.059 in) thick]
Insulates connectors, harness, etc.
76268-9E005: 100 ×135 mm (3.94 ×5.31 in)/76884-71L01: 60 ×85 mm (2.36× 3.35 in)/76884-71L02: 15× 25
mm (0.59 ×0.98 in)
INSULATOR (Foam blocks)
Insulates components from contact. Can be used to fill space behind a panel.
73982-9E000: 45 mm (1.77 in) thick, 50× 50 mm (1.97×1.97 in)/73982-50Y00: 10 mm (0.39 in) thick,
50× 50 mm (1.97 ×1.97 in)
INSULATOR (Light foam block)
80845-71L00: 30 mm (1.18 in) thick, 30 ×50 mm (1.18 ×1.97 in)
FELT CLOTH TAPE
Used to insulate where movement does not occu r. Ideal for instrument panel applications.
Revision: April 20092010 QX56
Page 2276 of 4210
SQUEAK AND RATTLE TROUBLE DIAGNOSISGW-5
< SYMPTOM DIAGNOSIS >
C
DE
F
G H
I
J
L
M A
B
GW
N
O P
2. Trunk lid striker out of adjustment
3. The trunk lid torsion bars knocking together
4. A loose license plate or bracket
Most of these incidents can be repaired by adjusting, se curing or insulating the item(s) or component(s) caus-
ing the noise.
SUNROOF/HEADLINING
Noises in the sunroof/headlining area can often be traced to one of the following:
1. Sunroof lid, rail, linkage or seals making a rattle or light knocking noise
2. Sun visor shaft shaking in the holder
3. Front or rear windshield touching headliner and squeaking
Again, pressing on the components to stop the noise while duplicating the conditions can isolate most of these
incidents. Repairs usually consist of insulating with felt cloth tape.
OVERHEAD CONSOLE (FRONT AND REAR)
Overhead console noises are often caused by the cons ole panel clips not being engaged correctly. Most of
these incidents are repaired by pushing up on the c onsole at the clip locations until the clips engage.
In addition look for:
1. Loose harness or harness connectors.
2. Front console map/reading lamp lense loose.
3. Loose screws at console attachment points.
SEATS
When isolating seat noise it's important to note the position the seat is in and the load placed on the seat when
the noise is present. These conditions should be duplicated when verifying and isolating the cause of the
noise.
Cause of seat noise include:
1. Headrest rods and holder
2. A squeak between the seat pad cushion and frame
3. The rear seatback lock and bracket
These noises can be isolated by moving or pressing on the suspected components while duplicating the con-
ditions under which the noise occurs. Most of thes e incidents can be repaired by repositioning the component
or applying urethane tape to the contact area.
UNDERHOOD
Some interior noise may be caused by components under the hood or on the engine wall. The noise is then
transmitted into the passenger compartment.
Causes of transmitted underhood noise include:
1. Any component mounted to the engine wall
2. Components that pass through the engine wall
3. Engine wall mounts and connectors
4. Loose radiator mounting pins
5. Hood bumpers out of adjustment
6. Hood striker out of adjustment
These noises can be difficult to isolate since they cannot be reached from the interior of the vehicle. The best
method is to secure, move or insulate one component at a time and test drive the vehicle. Also, engine RPM
or load can be changed to isolate the noise. Repairs can usually be made by moving, adjusting, securing, or
insulating the component causing the noise.
Revision: April 20092010 QX56
Page 2282 of 4210
WINDSHIELD GLASSGW-11
< ON-VEHICLE REPAIR >
C
DE
F
G H
I
J
L
M A
B
GW
N
O P
ON-VEHICLE REPAIR
WINDSHIELD GLASS
Removal and InstallationINFOID:0000000005147159
REMOVAL
1. Remove inside mirror. Refer to MIR-12, "Removal and Installation".
2. Partially remove the headlining (front edge). Refer to INT-17, "
Removal and Installation".
3. Remove cowl top extension. Refer to EXT-18, "
Removal and Installation".
4. Apply a protective tape around the windshield gl ass to protect the painted surface from damage.
• Remove glass using piano wire or power cutting tool and an inflatable pump bag.
• If the windshield glass is to be reused, mark the body and the glass with mating marks.
WARNING:
When cutting the glass from the vehicle, always wear safety glasses and heavy gloves to help prevent
glass splinters from entering your eyes or cutting your hands.
CAUTION:
• When the windshield glass is to be reused, do not use a cutting knife or power cutting tool.
• Be careful not to scratch the glass when removing.
• Do not set or stand glass on its ed ge. Small chips may develop into cracks.
INSTALLATION
Installation is in the reverse order of removal.
• Use a genuine NISSAN Urethane Adhesive Kit (if availabl e) or equivalent and follow the instructions fur-
nished with it.
• While the urethane adhesive is curing, open a door window . This will prevent the glass from being forced out
by passenger compartment air pressure when a door is closed.
• The molding must be installed securely so that it is in position and leaves no gap.
• Inform the customer that the vehicle should rema in stationary until the urethane adhesive has completely
cured (preferably 24 hours). Curing time varies with temperature and humidity.
LIIA0652E
PIIA0186E
Revision: April 20092010 QX56
Page 2287 of 4210
GW-16
< ON-VEHICLE REPAIR >
FRONT DOOR GLASS AND REGULATOR
Fitting Inspection
• Check that the glass is securely fit into the glass run groove.
• Lower the glass slightly [approximately 10 to 20 mm (0.39 to 0.79 in)] and check that the clearance to the
sash is parallel. If the clearance between the glass and sash is not parallel, loosen the regulator bolts, guide
rail bolts, and glass and guide rail bolts to correct the glass position.
FRONT DOOR GLASS REGULATOR
Removal
1. Remove the front door finisher. Refer the INT-11, "Removal and Installation".
2. Position aside the vapor shield.
3. Remove the hole cover over rear glass bolt.
4. Temporarily reconnect the power window switch.
5. Operate the power window main switch to raise/ lower the door window until the glass bolts can be seen.
6. Remove the glass bolts.
7. Raise the front door glass and hold it in place with suitable tool.
8. Disconnect the harness connector fr om the regulator assembly.
9. Remove the bolts and the regulator assembly.
Installation
1. Install the regulator assembly.
2. Reposition the vapor shield.
3. Connect the harness connector to the regulator assembly.
4. Align the glass and install the glass bolts.
5. Reset the limit switch. Follow the "Setting of Limit Switch" procedure.
6. Install front door finisher. Refer to INT-11, "
Removal and Installation".
SETTING AFTER INSTALLATION
Setting of Limit Switch
If any of the following work has been done, set the limit switch (integrated in the motor).
• Removal and installation of the regulator.
• Removal and installation of the motor from the regulator.
• Removal and installation of the glass.
• Removal and installation of the glass run.
Resetting
After installing each component, perform the following procedure to reset the limit switch.
1. Raise the glass to the top position.
2. While pressing and holding the reset switch, lower the glass to
the bottom position.
3. Release the reset switch. Verify that the reset switch returns to the original position, if not, pu ll the switch using suitable tool.
4. Raise the glass to the top position. CAUTION:
Do not operate the glass automatically to raise the glass to
the top position.
Disassembly And Assembly
Remove the regulator motor from the regulator assembly.
Inspection After Removal
Glass bolts : 6.1 N·m (0.62 kg-m, 54 in-lb)
Glass bolts : 6.1 N·m (0.62 kg-m, 54 in-lb)
SIIA0347E
Revision: April 20092010 QX56
Page 2289 of 4210
GW-18
< ON-VEHICLE REPAIR >
REAR DOOR GLASS AND REGULATOR
REAR DOOR GLASS AND REGULATOR
Removal and InstallationINFOID:0000000005147162
REAR DOOR GLASS
Removal
1. Remove the rear door finisher. Refer to INT-11, "Removal and Installation".
2. Position aside the vapor shield.
3. Temporarily reconnect the power window switch.
4. Operate the power window switch to raise/lower the door win- dow until the glass bolts can be seen.
5. Partially remove the inside seal.
6. Remove the glass run from the partition glass.
7. Remove the partition sash bolt (lower) and screw (upper) to remove the sash.
8. Remove the glass bolts and glass.
Installation
Installation is in the reverse order of removal.
Fitting Inspection
• Check that the glass is securely fit into the glass run groove.
• Lower the glass slightly [approximately 10 to 20 mm (0.39 to 0.79 in)], and check that the clearance to the
sash is parallel. If the clearance between the glass and sash is not parallel, loosen the regulator bolts, guide
rail bolts, and glass and carrier plate bolts to correct the glass position.
REAR DOOR GLASS REGULATOR
WIIA0942E
SIIA0290E
Glass bolts : 6.1 N·m (0.62 kg-m, 54 in-lb)
Revision: April 20092010 QX56
Page 2342 of 4210
HAC-2
Rear Air Control Component Function Check ........58
Air Mix Door Motor (Rear) Diagnosis Procedure ....59
Mode Door Motor (Rear) Diagnosis Procedure ......63
MAGNET CLUTCH ............................................68
System Description .............................................. ...68
Magnet Clutch Component Function Check ........ ...68
Magnet Clutch Diagnosis Procedure ................... ...68
WATER VALVE CIRCUIT ..................................73
Description ........................................................... ...73
Water Valve Diagnosis Procedure ..........................73
AMBIENT SENSOR ...........................................75
Component Description ....................................... ...75
Ambient Sensor Diagnosis Procedure ....................75
Ambient Sensor Component Inspection .................76
IN-VEHICLE SENSOR .......................................78
Component Description ....................................... ...78
In-Vehicle Sensor Diagnosis Procedure .................78
In-Vehicle Sensor Component Inspection ..............80
OPTICAL SENSOR ...........................................81
Component Description ..........................................81
Optical Sensor Diagnosis Procedure ......................81
INTAKE SENSOR ..............................................83
System Description .............................................. ...83
Intake Sensor Diagnosis Procedure .......................83
Intake Sensor Component Inspection ................. ...84
POWER SUPPLY AND GROUND CIRCUIT
FOR CONTROLLER ..........................................
86
Component Description ....................................... ...86
A/C Auto Amp. Component Function Check ..........86
A/C Auto Amp Power and Ground Diagnosis Pro-
cedure .................................................................. ...
87
ECU DIAGNOSIS .......................................89
AIR CONDITIONER CONTROL ..................... ...89
A/C Auto Amp. Terminals Reference Values ..........89
Wiring Diagram .................................................... ...91
SYMPTOM DIAGNOSIS ...........................107
AIR CONDITIONER CONTROL ..................... ..107
Symptom Matrix Chart ........................................ .107
INSUFFICIENT COOLING ................................108
Component Function Check ................................ .108
Diagnostic Work Flow ...........................................109
Performance Chart ................................................111
Trouble Diagnoses for Abnormal Pressure ...........112
INSUFFICIENT HEATING ................................116
Component Function Check .................................116
NOISE ...............................................................118
Component Function Check ................................ .118
MEMORY FUNCTION DOES NOT OPERATE ..120
Memory Function Check ...................................... .120
PRECAUTION ...........................................121
PRECAUTIONS .............................................. ..121
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .............................................................. .
121
Working with HFC-134a (R-134a) ........................ .121
Precaution for Service Equipment ........................122
Revision: April 20092010 QX56