2010 INFINITI QX56 sensor

ACC-2
< PRECAUTION >
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000005266449
The Supplemental Restraint System such as “A IR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity 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 inopera tive, 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 unintent ional activation of the system. For re moval of Spiral Cable and Air Bag
Module, see the SR section.
• Do not use electrical test equipmen t on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harn esses can be identified 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 Unit or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or electri c 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 minu tes before performing any service.
Precaution Necessary for Steering W heel Rotation After Battery Disconnect
INFOID:0000000005266450
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 disconnecting 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 pow er 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: April 20092010 QX56

ACC-4
< REMOVAL AND INSTALLATION >
ACCELERATOR CONTROL SYSTEM
REMOVAL AND INSTALLATION
ACCELERATOR CONTROL SYSTEM
Removal and InstallationINFOID:0000000005149563
Adjustable Accelerator Pedal
CAUTION:
• Do not disassemble the accelerator pedal adjusting mechanism.
• Before removal and installation the accelerator and brake pedals must be in the frontmost position.
This is to align the base position of the accelerator and brake pedals.
• Do not disassemble the accelerator pedal assembly.
• Do not remove the accelerator pedal position sensor from the accelerator pedal bracket.
• Avoid damage from dropping the accel erator pedal assembly during handling.
• Keep the accelerator pedal assembly away from water.
REMOVAL
1. Move the accelerator and brake pedals to the frontmost position.
2. Turn the ignition switch OFF and disconnect the negative battery terminal.
3. Disconnect the adjustable brake pedal cable from the adjustable brake pedal. • Unlock, then pull the adjustable brake pedal cable to disconnect it from the adjustable brake pedal.
LBIA0379E
1. Adjustable accelerator pedal assem-
bly 2. A/T control cable mounting bracket (part
of the accelerator pedal assembly) 3. Adjustable pedal electric motor (part
of the accelerator pedal assembly)
4. Adjustable brake pedal cable (part of the accelerator pedal assembly)
Revision: April 20092010 QX56

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-191, "
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: April 20092010 QX56

ADP-2
DTC Logic ...............................................................35
Diagnosis Procedure .............................................35
B2117 ADJ PEDAL MOTOR .............................36
Description ..............................................................36
DTC Logic ...............................................................36
Diagnosis Procedure .............................................36
B2118 TILT SENSOR ........................................38
Description ........................................................... ...38
DTC Logic ...............................................................38
Diagnosis Procedure .............................................38
B2120 ADJ PEDAL SENSOR ...........................40
Description ........................................................... ...40
DTC Logic ...............................................................40
Diagnosis Procedure .............................................40
B2126 DETENT SW ...........................................42
Description ........................................................... ...42
DTC Logic ...............................................................42
Diagnosis Procedure .............................................42
B2128 UART COMMUNICATION LINE ............44
Description ........................................................... ...44
DTC Logic ...............................................................44
Diagnosis Procedure .............................................44
POWER SUPPLY AND GROUND CIRCUIT .....46
BCM ........................................................................ ...46
BCM : Diagnosis Procedure ...................................46
DRIVER SEAT CONTROL UNIT ........................... ...47
DRIVER SEAT CONTROL UNIT :
Diagnosis Procedure .............................................
47
DRIVER SEAT CONTROL UNIT : Special Repair
Requirement ........................................................ ...
48
AUTOMATIC DRIVE POSITIONER CONTROL
UNIT ....................................................................... ...
48
AUTOMATIC DRIVE POSITIONER CONTROL
UNIT : Diagnosis Procedure ............................... ...
48
AUTOMATIC DRIVE POSITIONER CONTROL
UNIT : Special Repair Re quirement .......................
48
SLIDING SWITCH ..............................................50
Description ........................................................... ...50
Component Function Check .................................50
Diagnosis Procedure .............................................50
Component Inspection ............................................51
RECLINING SWITCH ........................................53
Description ........................................................... ...53
Component Function Check .................................53
Diagnosis Procedure .............................................53
Component Inspection ............................................54
LIFTING SWITCH (FRONT) ..............................56
Description ........................................................... ...56
Component Function Check .................................56
Diagnosis Procedure .............................................56
Component Inspection ......................................... ...57
LIFTING SWITCH (REAR) ................................59
Description ........................................................... ...59
Component Function Check ..................................59
Diagnosis Procedure ..............................................59
Component Inspection ............................................60
TILT SWITCH ....................................................62
Description ........................................................... ...62
Component Function Check ..................................62
Diagnosis Procedure ..............................................62
Component Inspection ............................................63
PEDAL ADJUSTING SWITCH ..........................65
Description ........................................................... ...65
Component Function Check ..................................65
Diagnosis Procedure ..............................................65
Component Inspection ............................................67
SEAT MEMORY SWITCH .................................68
Description ..............................................................68
Component Function Check ..................................68
Diagnosis Procedure ..............................................68
Component Inspection ............................................69
DOOR MIRROR REMOTE CONTROL
SWITCH .............................................................
70
CHANGEOVER SWITCH ....................................... ...70
CHANGEOVER SWITCH : Description ..................70
CHANGEOVER SWITCH : Component Function
Check ......................................................................
70
CHANGEOVER SWITCH : Diagnosis Procedure ...70
CHANGEOVER SWITCH : Component Inspec-
tion ..........................................................................
72
MIRROR SWITCH .................................................. ...72
MIRROR SWITCH : Description .............................72
MIRROR SWITCH : Component Function Check ...72
MIRROR SWITCH : Diagnosis Procedure ..............72
MIRROR SWITCH : Component Inspection ...........74
POWER SEAT SWITCH GROUND CIRCUIT ...76
Diagnosis Procedure ..............................................76
DETENTION SWITCH .......................................77
Description ........................................................... ...77
Component Function Check ..................................77
Diagnosis Procedure ..............................................77
FRONT DOOR SWITCH (DRIVER SIDE) .........79
Description ........................................................... ...79
Component Function Check ...................................79
Diagnosis Procedure ...............................................79
Component Inspection ............................................80
SLIDING SENSOR ............................................81
Description ..............................................................81
Component Function Check ..................................81
Diagnosis Procedure ..............................................81
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ADP-3
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RECLINING SENSOR .................................... ....83
Description .......................................................... ....83
Component Function Check ..................................83
Diagnosis Procedure ..............................................83
LIFTING SENSOR (FRONT) ..............................85
Description .......................................................... ....85
Component Function Check ..................................85
Diagnosis Procedure ..............................................85
LIFTING SENSOR (REAR) ................................87
Description .......................................................... ....87
Component Function Check ..................................87
Diagnosis Procedure ..............................................87
TILT SENSOR ....................................................89
Description ..............................................................89
Component Function Check ..................................89
Diagnosis Procedure ..............................................89
PEDAL ADJUSTING SENSOR ..........................91
Description .......................................................... ....91
Component Function Check ..................................91
Diagnosis Procedure ..............................................91
MIRROR SENSOR .............................................93
DRIVER SIDE ........................................................ ....93
DRIVER SIDE : Description ....................................93
DRIVER SIDE : Component Function Check ........93
DRIVER SIDE : Diagnosis Procedure ....................93
PASSENGER SIDE ...................................................95
PASSENGER SIDE : Description ....................... ....95
PASSENGER SIDE :
Component Function Check ..................................
95
PASSENGER SIDE : Diagnosis Procedure ...........95
SLIDING MOTOR ...............................................97
Description ..............................................................97
Component Function Check ..................................97
Diagnosis Procedure ..............................................97
RECLINING MOTOR ..........................................99
Description .......................................................... ....99
Component Function Check ..................................99
Diagnosis Procedure ..............................................99
LIFTING MOTOR (FRONT) ..............................101
Description .......................................................... ..101
Component Function Check ................................101
Diagnosis Procedure ............................................101
LIFTING MOTOR (REAR) ................................103
Description .......................................................... ..103
Component Function Check ................................103
Diagnosis Procedure ............................................103
TILT MOTOR ....................................................105
Description .......................................................... ..105
Component Function Check ................................105
Diagnosis Procedure ............................................105
PEDAL ADJUSTING MOTOR ........................107
Description ........................................................... ..107
Component Function Check ................................107
Diagnosis Procedure ............................................107
DOOR MIRROR MOTOR ................................109
Description .............................................................109
Component Function Check ..................................109
Diagnosis Procedure .............................................109
Component Inspection ...........................................111
SEAT MEMORY INDICATOR LAMP ..............112
Description .............................................................112
Component Function Check ................................112
Diagnosis Procedure ............................................112
Component Inspection ...........................................113
ECU DIAGNOSIS .......................................114
DRIVER SEAT CONTROL UNIT ....................114
Reference Value .................................................. ..114
Wiring Diagram ......................................................119
Fail Safe ................................................................133
DTC Index .............................................................134
AUTOMATIC DRIVE POSITIONER CON-
TROL UNIT ......................................................
135
Reference Value ....................................................135
Wiring Diagram ......................................................138
BCM (BODY CONTROL MODULE) ...............153
Reference Value ....................................................153
Terminal Layout .....................................................156
Physical Values ................................................... ..156
Wiring Diagram ......................................................162
Fail Safe ................................................................166
DTC Inspection Priority Chart .............................167
DTC Index .............................................................167
SYMPTOM DIAGNOSIS ............................169
ADP SYSTEM SYMPTOMS ............................169
Symptom Table ................................................... ..169
NORMAL OPERATING CONDITION .............171
Description .............................................................171
PRECAUTION ............................................172
PRECAUTIONS ...............................................172
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ............................................................. ..
172
Precaution Necessary for Steering Wheel Rota-
tion After Battery Disconnect .................................
172
Precaution for Work ...............................................173
ON-VEHICLE REPAIR ...............................174
DRIVER SEAT CONTROL UNIT ....................174
Removal and Installation ..................................... ..174
Revision: April 20092010 QX56

AUTOMATIC DRIVE POSITIONER SYSTEMADP-13
< FUNCTION DIAGNOSIS >
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AUTOMATIC DRIVE POSITIONER SYSTEM : Component DescriptionINFOID:0000000005147428
CONTROL UNITS
INPUT PARTS
Switches
4. Pedal adjusting switch M96 5 . A. Door mirrror LH D4, RH D107
B. Front door switch LH B 6. A. A/T selector lever
B. A/T shift selector (park position
switch) M203
7. A. Sliding motor LH B204 (driver seat view), reclining motor LH B205, lift-
ing motor (front) B2 06, lifting motor
(rear) B207
B. Driver seat control unit B202,
B203
C. Power seat switch LH B208 8. A. ADP steering switch M16
B. Tilt sensor M85 and tilt motor M86
Item Function
Driver seat control unit • Main unit of automatic drive positioner system
• It is connected to the CAN.
• It communicates with the automatic drive positioner control unit via UART com-
munication.
Automatic drive positioner control unit • It communicates with the driver seat control unit via UART communication.
• Perform various controls with the instructions of driver seat control unit.
• Perform the controls of the pedal adjusting, steering wheel, door mirror and the
seat memory switch.
BCM Transmit the following status to the driver seat control unit via CAN communication.
• Front door LH: OPEN/CLOSE
• Ignition switch position: ACC/ON
• Door lock: UNLOCK (with Intelligent Key or remote keyless entry request switch
operation)
• Key ID
• Key switch: Insert/Pull out Intelligent Key
• Starter: CRANKING/OTHER
Combination meter Transmit the vehicle speed signal to the driver seat control unit via CAN communi-
cation.
AV control unit The setting change of auto drive positioner system can be performed on the display.
A/T shift selector (park position switch) Transmit the shift position signal (P range) to the driver seat control unit.
Item Function
Key switch and ignition knob switch The key switch is installed to detect the key inserted/removed status.
Front door switch LH Detect front door (driver side) open/close status.
A/T shift selector (park position switch) Detect the P range position of A/T selector lever.
Set switch The registration and system setting can be performed with its operation.
Seat memory switch 1/2 The registration and operation can be performed with its operation.
Power seat switch The following switch is installed.
• Reclining switch
• Lifting switch (front)
• Lifting switch (rear)
• Sliding switch
The specific parts can be operated with the operation of each switch.
Pedal adjusting switch The following switch is installed.
• Pedal forward
• Pedal backward
The specific parts can be operated with the operation of each switch.
Revision: April 20092010 QX56

ADP-14
< FUNCTION DIAGNOSIS >
AUTOMATIC DRIVE POSITIONER SYSTEM
Sensors
OUTPUT PARTS
MANUAL FUNCTION
ADP steering switchThe following switch is installed.
• Steering wheel UP
• Steering wheel down
The specific parts can be operated with the operation of each switch.
Door mirror remote control switch The following switch is installed.
• Mirror switch
• Changeover switch
The specific parts can be operated with the operation of each switch.
Item
Function
Item Function
Door mirror sensor (LH/RH) Detect the up/down and left/right position of outside mirror face.
Pedal adjusting sensor Detect the forward/backward position of pedal assembly.
Tilt sensor Detect the upward/downward position of the steering wheel.
Lifting sensor (front) Detect the up/down position of seat lifting (front).
Lifting sensor (rear) Detect the up/down position of seat lifting (rear).
Reclining sensor Detect the tilt of seatback.
Sliding sensor Detect the front/rear position of seat.
Item Function
Door mirror motor (LH/RH) Move the outside mirror face upward/downward and left/right.
Pedal adjusting motor Move the pedal assembly forward/backward.
Tilt motor Move the steering wheel upward/downward.
Lifting motor (front) Move the seat lifting (front) upward/downward.
Lifting motor (rear) Move the seat lifting (rear) upward/downward.
Reclining motor Tilt and raise up the seatback.
Sliding motor Slide the seat forward/backward.
Seat memory indicator Illuminates or flashes according to the registration/operation status.
Revision: April 20092010 QX56

ADP-16
< FUNCTION DIAGNOSIS >
AUTOMATIC DRIVE POSITIONER SYSTEM
Tilt steering wheel
Door Mirror
NOTE:
The door mirrors can be operated manually when ignition switch is in either ACC or ON position. The ignition
switch signal (ACC/ON) is transmitted from BCM to the driver seat control unit via CAN communication and
from the driver seat control unit to the automatic drive positioner control unit via UART communication.
OrderInput Output Control unit condition
1 Pedal adjusting switch —The pedal adjusting switch signal is input to the automatic drive
positioner control unit when the pedal adjusting switch is operat-
ed.
2—M oto r The automatic drive positioner control unit actuates the motor ac-
cording to the operation of the pedal adjusting switch signal from
the driver seat control unit.
3 Sensor
(forward, backward) —The automatic drive positioner control unit recognizes any oper-
ation limit of each actuator via each sensor and will not operate
the actuator anymore at that time.
Order
Input Output Control unit condition
1 ADP steering switch —The ADP steering switch signal is input to the automatic drive po-
sitioner control unit when the ADP steering switch is operated.
2—M oto r The automatic drive positioner control unit actuates the tilt motor
according to the operation of the ADP steering switch signal.
3 Sensor
(upward, downward) —The automatic drive positioner control unit recognizes any oper-
ation limit of each actuator via each sensor and will not operate
the actuator anymore at that time.
Order
Input Output Control unit condition
1 Door mirror remote
control switch —The door mirror remote control switch signal is inputted to the au-
tomatic drive positioner control unit when the door mirror remote
control switch is operated.
2— Motors
(Door mirror motor)The automatic drive positioner control unit actuates each motor
according to the operation of the door mirror remote control switch.
Revision: April 20092010 QX56