Infiniti Q45. Manual - part 2

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AUTO CRUISE CONTROL SYSTEM

K  ELECTRICAL

CONTENTS

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SECTION 

ACS

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ACS

AUTO CRUISE CONTROL SYSTEM

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 Tools  ............................................... 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

Functional Diagram  .................................................. 7
Components Description  .......................................... 9
CAN Communication ................................................ 9

CAN COMMUNICATION UNIT  ............................. 9

Switch Operation  .................................................... 10
ICC System Display  ............................................... 10

ACTION TEST  ...........................................................11

ICC System Running Test  .......................................11

VEHICLE-TO-VEHICLE DISTANCE CONTROL 
MODE ..................................................................11
CONVENTIONAL (FIXED SPEED) CRUISE 
CONTROL MODE ............................................... 12

LASER BEAM AIMING ADJUSTMENT  ................... 14

Outline .................................................................... 14
Preparation ............................................................. 14
Outline of Adjustment Procedure  ........................... 14
Setting the ICC Target Board  ................................. 14

ADJUSTING HEIGHT OF THE TARGET ............ 14

SETTING THE TARGET  ..................................... 15

Aiming Adjustment .................................................. 16

CHECK AFTER THE ADJUSTMENT .................. 18

ELECTRICAL UNITS LOCATION  ............................ 19

Component Parts and Harness Connector Location 

... 19

WIRING DIAGRAM  ................................................... 20

Schematic ............................................................... 20
Wiring Diagram — ICC —  ...................................... 21

TERMINALS AND REFERENCE VALUE ................. 29

Terminals and Reference Value for ICC Unit  .......... 29
Terminals and Reference Value for ICC Sensor  ..... 30
Terminals and Reference Value for ICC Warning 
Chime (Without LDW Models)  ................................ 31
Terminals and Reference Value for ICC Warning 
Chime (With LDW Models)  ..................................... 31

TROUBLE DIAGNOSIS - GENERAL DESCRIP-
TION .......................................................................... 32

Work Flow ............................................................... 32
CONSULT-II Function (ICC)  ................................... 33

CONSULT-II BASIC OPERATION  ....................... 33
WORK SUPPORT  ............................................... 33
SELF-DIAG RESULTS  ........................................ 34
DATA MONITOR  ................................................. 34
ACTIVE TEST  ..................................................... 36

Self-Diagnostic Function ......................................... 38

WITH CONSULT-II  .............................................. 38
WITHOUT CONSULT-II ....................................... 38
SELF-DIAGNOSIS BY ICC SYSTEM DISPLAY 
WILL NOT RUN ................................................... 40

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC 
ITEMS ........................................................................ 43

Diagnostic Trouble Code (DTC) Chart  ................... 43
DTC 11 CONTROL UNIT  ....................................... 44
DTC 20 CAN COMM CIRCUIT ............................... 45
DTC 31 POWER SUPPLY CIR, DTC 34 POWER 
SUPPLY CIR 2  ....................................................... 45
DTC 41 VHCL SPEED SE CIRC ............................ 46
DTC 43 ABS/TCS/VDC CIRC  ................................ 47
DTC 45 BRAKE SW/STOP L SW ........................... 47
DTC 46 OPERATION SW CIRC ............................. 49

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DTC 61 PRESS SEN CIRCUIT  .............................. 51
DTC 62 BOOSTER SOL/V CIRCUIT ...................... 53
DTC 63 RELEASE SW CIRCUIT  ........................... 54
DTC 65 PRESSURE CONTROL  ............................ 55
DTC 74 LASER BEAM OFF CNTR  ........................ 56
DTC 90 STOP LAMP RLY FIX  ............................... 56
DTC 92 ECM CIRCUIT ........................................... 62
DTC 96 NP RANGE  ............................................... 63
DTC 97 AT CIRCUIT  .............................................. 65
DTC 98 GEAR POSITION  ...................................... 65
DTC 102 RADAR STAIN  ........................................ 66
DTC 103 LASER SENSOR FAIL  ............................ 66
DTC 104 LASER AIMING INCMP  .......................... 67
DTC 107 LASER COMM FAIL ................................ 67
DTC 109 LASER HIGH TEMP  ............................... 67

TROUBLE DIAGNOSIS FOR SYMPTOMS  .............. 68

Symptom Chart ....................................................... 68

Symptom 1: MAIN Switch Does Not Turn ON*

1

 , 

MAIN Switch Does Not Turn OFF*

2

 ........................ 69

Symptom 2: ICC System Cannot Be Set (MAIN 
Switch Turns ON/OFF)  ........................................... 69
Symptom 3: ICC System Cannot Be Operated by 
CANCEL Switch, RESUME/ACCELERATE Switch 
or DISTANCE Switch  .............................................. 70
Symptom 4: ICC System Is Not Cancelled When 
the A/T Selector Lever Is in Other Than “D” and “M” 
Position ................................................................... 71

Symptom 5: Chime Does Not Sound  ......................71
Symptom 6: Chime Does Not Stop  .........................75
Symptom 7: Driving Force Is Hunting  .....................75
Symptom 8: ICC System Frequently Cannot Detect 
the Vehicle Ahead/ Detection Zone Is Short  ...........75
Symptom 9: The System Does Not Detect the Vehi-
cle Ahead at All  .......................................................76

ELECTRICAL COMPONENT INSPECTION  .............77

ICC Steering Switch  ................................................77
Booster Solenoid .....................................................77
Release Switch  .......................................................77
ICC Brake Switch and Stop Lamp Switch  ...............78
ICC BRAKE HOLD RELAY  .....................................78

REMOVAL AND INSTALLATION ..............................79

ICC Unit  ..................................................................79

REMOVAL ............................................................79
INSTALLATION ....................................................79

ICC Sensor  .............................................................79

REMOVAL ............................................................79
INSTALLATION ....................................................80

ICC Warning Chime (Without LDW models)  ...........80

REMOVAL ............................................................80
INSTALLATION ....................................................80

ICC Warning Chime (With LDW models)  ................80

REMOVAL AND INSTALLATION  .........................80

ICC Steering Switch  ................................................80

REMOVAL AND INSTALLATION  .........................80

AUTOMATIC SPEED CONTROL DEVICE (ASCD)

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[ASCD]

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[ASCD]

AUTOMATIC SPEED CONTROL DEVICE (ASCD)

PFP:18930

Description

NKS001JO

Regarding the information for ASCD system, refer to 

EC-29, "AUTOMATIC SPEED CONTROL DEVICE

(ASCD)"

 .

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[ICC]

PRECAUTIONS

[ICC]

PRECAUTIONS

PFP:00001

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

NKS001JP

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:

●

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.

●

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.

●

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

NKS001JQ

●

Do not look straight into the laser beam discharger when adjusting laser beam aiming.

●

Turn the MAIN switch OFF in conditions similar to driving, such as free rollers or a chassis dynamometer.

●

Do not use the ICC sensor removing from vehicle, disassemble, or remodel the sensor.

●

Erase DTC when replacing parts of ICC system, then check the operation of ICC system after adjusting
laser beam aiming if necessary.