2006 INFINITI QX56 diagram

ACS-1
AUTO CRUISE CONTROL SYSTEM
K ELECTRICAL
CONTENTS
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Revision: November 2009 2006 QX56
ASCD
AUTOMATIC SPEED CONTROL DEVICE (ASCD) ..... 3
Description .......................................................... ..... 3
ICC
PRECAUTIONS ..................................................... ..... 4
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ............................................................. ..... 4
Precautions for ICC System Service ................... ..... 4
PREPARATION ...................................................... ..... 5
Special Service Tool ............................................ ..... 5
DESCRIPTION ....................................................... ..... 6
Outline ................................................................. ..... 6
VEHICLE-TO-VEHICLE DISTANCE CONTROL
MODE .............................................................. ..... 6
CONVENTIONAL (FIXED SPEED) CRUISE
CONTROL MODE ............................................ ..... 6
BRAKE ASSIST (WITH PREVIEW FUNCTION) ..... 6
System Diagram .................................................. ..... 6
Components Description ..................................... ..... 7
CAN Communication ........................................... ..... 7
SYSTEM DESCRIPTION ................................. ..... 7
Switch Operation ................................................. ..... 7
ICC System Display ............................................ ..... 8
ACTION TEST ....................................................... ..... 9
ICC System Running Test ................................... ..... 9
VEHICLE-TO-VEHICLE DISTANCE CONTROL
MODE .............................................................. ..... 9
CONVENTIONAL (FIXED SPEED) CRUISE
CONTROL MODE ............................................ ... 10
LASER BEAM AIMING ADJUSTMENT ................ ... 12
Outline of Laser Beam Aiming Adjustment Proce-
dure ..................................................................... ... 12
Preparation .......................................................... ... 12
Setting up the ICC Target Board ......................... ... 12
ADJUSTING HEIGHT OF THE TARGET ......... ... 12
ADJUSTING THE POSITION OF THE TARGET
BOARD STRING .............................................. ... 13POSITIONING THE TARGET ..........................
... 13
Sensor Adjustment .............................................. ... 14
CHECK AFTER THE ADJUSTMENT ............... ... 17
ELECTRICAL UNITS LOCATION ......................... ... 18
Component Parts and Harness Connector Location ... 18
WIRING DIAGRAM ................................................ ... 19
Schematic ............................................................ ... 19
Wiring Diagram — ICC — ................................... ... 20
TERMINALS AND REFERENCE VALUE .............. ... 24
Terminals and Reference Values for ICC Unit ..... ... 24
Terminals and Reference Values for ICC Sensor ... 24
TROUBLE DIAGNOSIS — GENERAL DESCRIP-
TION ....................................................................... ... 25
Work Flow ............................................................... 25
CONSULT-II Function (ICC) ................................ ... 26
CONSULT-II OPERATION ................................ ... 26
WORK SUPPORT ............................................ ... 27
SELF-DIAGNOSTIC RESULTS ........................ ... 28
DATA MONITOR .............................................. ... 28
ACTIVE TEST ..................................................... 30
Self-Diagnostic Function ...................................... ... 31
WITH CONSULT-II ........................................... ... 31
WITHOUT CONSULT-II .................................... ... 32
SELF-DIAGNOSIS BY ICC SYSTEM DISPLAY
WILL NOT RUN ................................................ ... 33
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC
ITEMS ..................................................................... ... 36
Diagnostic Trouble Code (DTC) Chart ................ ... 36
DTC 11 CONTROL UNIT .................................... ... 37
DTC 12 VDC CONTROL UNIT ............................ ... 37
DTC 20 CAN COMM CIRCUIT ............................ ... 38
DTC 31 POWER SUPPLY CIR1, DTC 34 POWER
SUPPLY CIR2 ........................................................ 38
DTC 41 VHCL SPEED SE CIRC ......................... ... 39
DTC 43 VDC/TCS/ABS CIRC ............................. ... 39
DTC 45 BRAKE SW/STOP L SW ........................ ... 40
DTC 46 OPERATION SW CIRC .......................... ... 41
DTC 74 LASER BEAM OFF CNTR ..................... ... 42
DTC 90 STOP LAMP RLY FIX ............................... 43
DTC 92 ECM CIRCUIT ........................................ ... 47

ACS-6
[ICC]
DESCRIPTION
Revision: November 20092006 QX56
DESCRIPTIONPFP:00000
OutlineEKS00BLG
The Intelligent Cruise Control (ICC) system automatically maintains a selected distance from the vehicle
ahead according to that vehicle's speed, or at the set speed, if the road ahead is clear.
The ICC function has two cruise control modes and brake assist (with preview function). The ICC system may
AUTO-CANCEL for various reasons, for example, when the windshield wipers are operating.
VEHICLE-TO-VEHICLE DISTANCE CONTROL MODE
Vehicle-to-vehicle distance control mode, the same speed as other vehicles, can be maintained without the
constant need to adjust the operating speed as with a conventional cruise control system.
The system is intended to enhance the operation of the vehicle when following another vehicle in the same
lane and direction.
If the distance sensor detects a slower moving vehicle ahead, the system will reduce speed so that the vehicle
ahead can be followed at the selected distance.
The system automatically controls the throttle and applies the brakes (up to 25% of vehicle braking power) if
necessary.
The detection range of the sensor is approximately 120 m (390 ft) ahead.
Refer to Owner's Manual for Intelligent Cruise Control System operating instructions.
CONVENTIONAL (FIXED SPEED) CRUISE CONTROL MODE
Conventional (fixed speed) cruise control mode is cruising at preset speeds.
Refer to Owner's Manual for Intelligent Cruise Control System operation instructions.
BRAKE ASSIST (WITH PREVIEW FUNCTION)
When the force applied to brake pedal exceeds a certain level, the brake assist is activated and generates a
greater braking force than that of a conventional brake booster, even with light pedal force.
When the preview function identifies the need to apply the sudden brake by sensing the vehicle ahead in the
same lane and the distance and relative speed from it, it applies the brake pre-pressure before driver
depresses the brake pedal and improves brake response by reducing its free play.
Refer to Owner's Manual for Intelligent Cruise Control System operating instructions.
System DiagramEKS00BLH
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WIRING DIAGRAMACS-19
[ICC]
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Revision: November 2009 2006 QX56
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SchematicEKS00BLS
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ACS-20
[ICC]
WIRING DIAGRAM
Revision: November 20092006 QX56
Wiring Diagram — ICC —EKS00BLT
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WIRING DIAGRAMACS-21
[ICC]
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Revision: November 2009 2006 QX56
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ACS-22
[ICC]
WIRING DIAGRAM
Revision: November 20092006 QX56
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WIRING DIAGRAMACS-23
[ICC]
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AT-1
AUTOMATIC TRANSMISSION
C TRANSMISSION/TRANSAXLE
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Revision: November 2009 2006 QX56
INDEX FOR DTC ...................................................
..... 5
Alphabetical Index ............................................... ..... 5
DTC No. Index .................................................... ..... 6
PRECAUTIONS ..................................................... ..... 7
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ............................................................. ..... 7
Precautions for On Board Diagnostic (OBD) System
of A/T and Engine .................................................... 7
Precautions ......................................................... ..... 8
Service Notice or Precautions ............................. ..... 9
PREPARATION ...................................................... ... 10
Special Service Tools .......................................... ... 10
Commercial Service Tools ................................... .... 11
A/T FLUID .............................................................. ... 12
Changing Automatic Transmission Fluid (ATF) ... ... 12
Checking Automatic Transmission Fluid (ATF) ... ... 12
A/T Fluid Cooler Cleaning ................................... ... 14
A/T CONTROL SYSTEM ....................................... ... 17
Cross-Sectional View (2WD models) .................. ... 17
Cross-Sectional View (4WD models) .................. ... 18
Shift Mechanism .................................................. ... 19
TCM Function ...................................................... ... 30
CAN Communication ........................................... ... 31
Input/Output Signal of TCM ................................. ... 31
Line Pressure Control ......................................... ... 32
Shift Control ........................................................ ... 33
Lock-up Control ................................................... ... 34
Engine Brake Control .......................................... ... 36
Control Valve ....................................................... ... 36
ON BOARD DIAGNOSTIC (OBD) SYSTEM ......... ... 38
Introduction ......................................................... ... 38
OBD-II Function for A/T System .......................... ... 38
One or Two Trip Detection Logic of OBD-II ......... ... 38
OBD-II Diagnostic Trouble Code (DTC) .............. ... 38
Malfunction Indicator Lamp (MIL) ........................ ... 41
TROUBLE DIAGNOSIS ......................................... ... 42
DTC Inspection Priority Chart ............................. ... 42
Fail-Safe .............................................................. ... 42
How To Perform Trouble Diagnosis For Quick and Accurate Repair ...................................................
... 44
A/T Electrical Parts Location ............................... ... 49
Circuit Diagram ....................................................... 50
Inspections Before Trouble Diagnosis ................. ... 51
Check Before Engine is Started ........................... ... 55
Check at Idle ........................................................... 55
Cruise Test - Part 1 .............................................. ... 56
Cruise Test - Part 2 .............................................. ... 58
Cruise Test - Part 3 .............................................. ... 59
Vehicle Speed When Shifting Gears ................... ... 60
Vehicle Speed When Performing and Releasing
Complete Lock-up .................................................. 60
Vehicle Speed When Performing and Releasing
Slip Lock-up ............................................................ 60
Symptom Chart ....................................................... 61
TCM Input/Output Signal Reference Values ........ ... 83
CONSULT-II Function (A/T) ................................. ... 84
DTC U1000 CAN COMMUNICATION LINE ........... ... 96
Description ........................................................... ... 96
On Board Diagnosis Logic ................................... ... 96
Possible Cause ....................................................... 96
DTC Confirmation Procedure .............................. ... 96
Wiring Diagram — AT — CAN ............................. ... 97
Diagnostic Procedure .......................................... ... 99
DTC P0615 START SIGNAL CIRCUIT .................. .100
Description ........................................................... .100
CONSULT-II Reference Value ............................. .100
On Board Diagnosis Logic ................................... .100
Possible Cause .................................................... .100
DTC Confirmation Procedure .............................. .100
Wiring Diagram — AT — STSIG ......................... .101
Diagnostic Procedure .......................................... .102
DTC P0700 TCM .................................................... .104
Description ........................................................... .104
On Board Diagnosis Logic ................................... .104
Possible Cause .................................................... .104
DTC Confirmation Procedure .............................. .104
Diagnostic Procedure .......................................... .104
DTC P0705 PARK/NEUTRAL POSITION SWITCH .105
Description ........................................................... .105