Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Infiniti QX56 JA60 2004-2005 Approved 2004_QX56 acs

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acs

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K ELECTRICAL

AUTO CRUISE CONTROL SYSTEM
SECTION ACS B

E
CONTENTS
ASCD ADJUSTING THE POSITION OF THE ICC TAR- F
GET BOARD STRING ........................................ 13 .
AUTOMATIC SPEED CONTROL DEVICE (ASCD) 3 ..... POSITIONING THE ICC TARGET BOARD ....... 13 .
Description .............................................................. 3
. Sensor Adjustment ................................................ 14 . G
CHECK AFTER THE ADJUSTMENT ................. 17 .
ICC ELECTRICAL UNITS LOCATION ........................... 18 .
Component Parts and Harness Connector Location 18 ...
PRECAUTIONS ......................................................... 4 . H
WIRING DIAGRAM .................................................. 19 .
Precautions for Supplemental Restraint System Schematic .............................................................. 19
.
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN- Wiring Diagram -- ICC -- ..................................... 20 .
SIONER" ................................................................. 4
. TERMINALS AND REFERENCE VALUE ................ 25 . I
Precautions for ICC System Service ....................... 4 . Terminals and Reference Values for ICC Unit ....... 25 .
Wiring Diagrams and Trouble Diagnosis ................. 4 . Terminals and Reference Values for ICC Sensor ... 25
PREPARATION .......................................................... 5 . TROUBLE DIAGNOSIS -- GENERAL DESCRIP- J
Special Service Tool ................................................ 5 . TION ......................................................................... 26
.
DESCRIPTION ........................................................... 6 . Work Flow .............................................................. 26
.
Outline ..................................................................... 6
. CONSULT-II Function (ICC) .................................. 27 .
VEHICLE-TO-VEHICLE DISTANCE CONTROL ACS
CONSULT-II OPERATION .................................. 27 .
MODE .................................................................. 6
. WORK SUPPORT .............................................. 28 .
CONVENTIONAL (FIXED SPEED) CRUISE SELF-DIAGNOSTIC RESULTS .......................... 28 .
CONTROL MODE ................................................ 6 . DATA MONITOR ................................................ 29 . L
BRAKE ASSIST (WITH PREVIEW FUNCTION) 6 ..... ACTIVE TEST .................................................... 30 .
System Diagram ...................................................... 7 . Self-Diagnostic Function ........................................ 32 .
Components Description ......................................... 7 . WITH CONSULT-II ............................................. 32 . M
CAN Communication ............................................... 7 . WITHOUT CONSULT-II ...................................... 32 .
SYSTEM DESCRIPTION ..................................... 7 . SELF-DIAGNOSIS BY ICC SYSTEM DISPLAY
Switch Operation ..................................................... 8 . WILL NOT RUN .................................................. 34 .
ICC System Display ................................................ 8 . TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC
ACTION TEST ........................................................... 9 . ITEMS ....................................................................... 36
.
ICC System Running Test ....................................... 9 . Diagnostic Trouble Code (DTC) Chart .................. 36 .
VEHICLE-TO-VEHICLE DISTANCE CONTROL DTC 11 CONTROL UNIT ...................................... 37 .
MODE .................................................................. 9
. DTC 12 VDC CONTROL UNIT .............................. 37 .
CONVENTIONAL (FIXED SPEED) CRUISE DTC 20 CAN COMM CIRCUIT .............................. 38 .
CONTROL MODE .............................................. 10 . DTC 31 POWER SUPPLY CIR 1, DTC 34 POWER
LASER BEAM AIMING ADJUSTMENT .................. 12 . SUPPLY CIR 2 ...................................................... 38 .
Outline of Laser Beam Aiming Adjustment Proce- DTC 41 VHCL SPEED SE CIRC ........................... 39 .
dure ....................................................................... 12
. DTC 43 VDC/TCS/ABS CIRC ............................... 39 .
Preparation ............................................................ 12
. DTC 45 BRAKE SW/STOP L SW .......................... 40 .
Setting up the ICC Target Board ........................... 12 . DTC 46 OPERATION SW CIRC ............................ 41 .
ADJUSTING HEIGHT OF THE ICC TARGET DTC 74 LASER BEAM OFF CENTER .................. 42 .
BOARD .............................................................. 12.

Revision: August 2007 ACS-1 2004 QX56
DTC 90 STOP LAMP RLY FIX .............................. 43 . DISTANCE Switch .................................................54 .
DTC 92 ECM CIRCUIT .......................................... 47 . Symptom 4: The ICC System Is Not Cancelled
DTC 96 NP RANGE .............................................. 48. When the Gear Is in Other Than `D' .......................55 .
DTC 97 AT CIRCUIT ............................................. 48
. Symptom 5: Chime Does Not Sound .....................55 .
DTC 98 GEAR POSITION ..................................... 49 . Symptom 6: Driving Force Is Hunting ....................56 .
DTC 102 LASER STAIN ........................................ 49 . Symptom 7: The ICC System Frequently Cannot
DTC 103 LASER SENSOR FAIL ........................... 50 . Detect the Vehicle Ahead/The Detection Zone is
DTC 104 LASER AIMING INCMP ......................... 50 . Short ......................................................................56
.
DTC 107 LASER COMM FAIL ............................... 51 . Symptom 8: The System Does Not Detect the Vehi-
DTC 109 LASER HIGH TEMP .............................. 51 . cle Ahead at All ......................................................56.
TROUBLE DIAGNOSIS FOR SYMPTOMS ............. 52 . ELECTRICAL COMPONENT INSPECTION ............58 .
Symptom Chart ...................................................... 52
. ICC Steering Switch ...............................................58 .
1 ICC Brake Switch and Stop Lamp Switch ..............58 .
Symptom 1: ON/OFF Switch Does Not Switch ON*
Parking Brake Switch .............................................58 .
, ON/OFF Switch Does Not Switch OFF*2 ............. 53 .
REMOVAL AND INSTALLATION .............................59 .
Symptom 2: The ICC System Cannot Be Set (ON/
ICC Unit .................................................................59
.
OFF Switch Turns On/Off) ..................................... 53.
ICC Sensor ............................................................59.
Symptom 3: The ICC System Cannot Be Operated
ICC Steering Switch ...............................................59 .
by the CANCEL Switch, ACCEL/RES Switch, or

Revision: August 2007 ACS-2 2004 QX56
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
[ASCD]
AUTOMATIC SPEED CONTROL DEVICE (ASCD) PFP:18930
A
Description EKS007NI

Regarding the information for ASCD system, refer to EC-647, "AUTOMATIC SPEED CONTROL DEVICE
(ASCD)" . B

ACS

Revision: August 2007 ACS-3 2004 QX56
PRECAUTIONS
[ICC]
PRECAUTIONS PFP:00001

Precautions for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT
BELT PRE-TENSIONER" EKS007YA

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 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 whether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the SRS and SB section of this Service Man-
ual.
WARNING:
G To avoid rendering the SRS inoperative, 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 per-
formed by an authorized NISSAN/INFINITI dealer.
G Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.
G Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
Precautions for ICC System Service EKS007YB

G Do not look straight into the laser beam discharger when adjusting laser beam aiming.
G Turn the ON/OFF switch OFF during chassis dynamometer testing.
G Do not remove, disassemble, or reposition the ICC sensor unless told to do so.
G Erase DTC when replacing parts of ICC system, then check the operation of ICC system after adjusting
laser beam aiming if necessary.
Wiring Diagrams and Trouble Diagnosis EKS007YC

When you read wiring diagrams, refer to the following:
G Refer to GI-15, "How to Read Wiring Diagrams" in GI section.
G Refer to PG-4, "POWER SUPPLY ROUTING CIRCUIT" for power distribution circuit in PG section.
When you perform trouble diagnosis, refer to the following:
G Refer to GI-11, "HOW TO FOLLOW TEST GROUPS IN TROUBLE DIAGNOSES" in GI section.
G Refer to GI-27, "How to Perform Efficient Diagnosis for an Electrical Incident" in GI section.

Revision: August 2007 ACS-4 2004 QX56
PREPARATION
[ICC]
PREPARATION PFP:00002
A
Special Service Tool EKS007YD

The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Tool number Description B
(Kent-Moore No.)
Tool name
Performing laser beam aiming ad- C
justment
KV99110100
(J-45718)
D
ICC target board

PKIA0358J
E

ACS

Revision: August 2007 ACS-5 2004 QX56
DESCRIPTION
[ICC]
DESCRIPTION PFP:00000

Outline EKS007RI

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 operated at the low speed
(LO) or high speed (HI) position.
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 390 ft (120 m) 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.

Revision: August 2007 ACS-6 2004 QX56
DESCRIPTION
[ICC]
System Diagram EKS007RJ

WKIA1976E I

Components Description EKS007RK

Conventional J
Vehicle-to-vehicle Brake assist
(fixed speed)
Component distance control (with preview Description
cruise control
mode brake)
mode
ACS
Controls vehicle speed through ECM via CAN
ICC unit

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