speed sensor INFINITI FX35 2006 Service Manual

ACS-1
AUTO CRUISE CONTROL SYSTEM
K ELECTRICAL
CONTENTS
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ACS
Revision: 2006 December 2006 FX35/FX45
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
ADJUSTING THE RIGHT-LEFT POSITION OF
THE TARGET ................................................... ... 15 SETTING THE TARGET ..................................
... 15
Aiming Adjustment ............................................... ... 17
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 .............. ... 28
Terminals and Reference Value for ICC Unit ....... ... 28
Terminals and Reference Value for ICC Sensor .. ... 29
TROUBLE DIAGNOSIS — GENERAL DESCRIP-
TION ....................................................................... ... 30
Work Flow ............................................................ ... 30
CONSULT-II Function (ICC) ................................ ... 31
DESCRIPTION ................................................. ... 31
CONSULT-II BASIC OPERATION .................... ... 31
WORK SUPPORT ............................................ ... 32
SELF-DIAGNOSTIC RESULTS ........................ ... 32
DATA MONITOR .............................................. ... 33
ACTIVE TEST .................................................. ... 35
Self-Diagnostic Function ...................................... ... 37
WITH CONSULT-II ........................................... ... 37
WITHOUT CONSULT-II .................................... ... 37
SELF-DIAGNOSIS BY ICC SYSTEM DISPLAY
WILL NOT RUN ................................................ ... 39
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC
ITEMS ..................................................................... ... 42
Diagnostic Trouble Code (DTC) Chart ................ ... 42
DTC 11 CONTROL UNIT .................................... ... 44
DTC 20 CAN COMM CIRCUIT ............................ ... 44
DTC 31 POWER SUPPLY CIR, DTC 34 POWER
SUPPLY CIR 2 .................................................... ... 44
DTC 41 VHCL SPEED SE CIRC ......................... ... 45
DTC 43 ABS/TCS/VDC CIRC ............................. ... 46
DTC 45 BRAKE SW/STOP L SW ........................ ... 46
DTC 46 OPERATION SW CIRC .......................... ... 48
DTC 61 PRESS SEN CIRCUIT ........................... ... 50
DTC 62 BOOSTER SOL/V CIRCUIT .................. ... 51
DTC 63 RELEASE SW CIRCUIT ........................ ... 52

ACS-6
[ICC]
DESCRIPTION
Revision: 2006 December 2006 FX35/FX45
DESCRIPTIONPFP:00000
OutlineNKS003EJ
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).
VEHICLE-TO-VEHICLE DISTANCE CONTROL MODE
With vehicle-to-vehicle distance control mode, the driver can maintain the same speed as other vehicles with-
out the constant need to adjust the set speed as the driver would with a normal cruise control system.
The system is intended to enhance the operation of the vehicle when following the vehicle traveling 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 operating 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 depress
the brake pedal and improves brake response by reducing its free play.
Refer to Owner's Manual for BRAKE ASSIST (WITH PREVIEW FUNCTION) operating instructions.

DESCRIPTION ACS-7
[ICC]
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Revision: 2006 December 2006 FX35/FX45
Functional DiagramNKS003ID
Items of input/output signal to be checked with CONSULT-II
PKIC8700E
Input Data monitored
Item [unit] CAN Description
ECM THRTL OPENING
[%] ×Indicates throttle angle read by ICC unit through CAN communication (ECM transmits
throttle angle through CAN communication).
ENGINE RPM
[rpm] ×
Indicates engine speed read by ICC unit through CAN communication (ECM transmits
engine speed through CAN communication).
MAIN SW
[ON/OFF] × Indicates [ON/OFF] status as judged from steering switch signal (ECM transmits steer-
ing switch signal through CAN communication).
SET/COAST SW
[ON/OFF] ×Indicates [ON/OFF] status as judged from steering switch signal (ECM transmits steer-
ing switch signal through CAN communication).
CANCEL SW
[ON/OFF] ×
Indicates [ON/OFF] status as judged from steering switch signal (ECM transmits steer-
ing switch signal through CAN communication).
RESUME/ACC SW
[ON/OFF] × Indicates [ON/OFF] status as judged from steering switch signal (ECM transmits steer-
ing switch signal through CAN communication).
IDLE SW
[ON/OFF] ×Indicates [ON/OFF] status of idle switch read by ICC unit through CAN communication
(ECM transmits ON/OFF status through CAN communication).
TCM VHCL SPD AT
[km/h] or [mph] × Indicates vehicle speed calculated from AT vehicle speed sensor by ICC unit through
CAN communication (TCM transmits AT vehicle speed sensor signal through CAN com-
munication).
GEAR
[1, 2, 3, 4, 5] ×
Indicates AT gear position read by ICC unit through CAN communication (TCM trans-
mits gear position through CAN communication).
D RANGE SW
[ON/OFF] × Indicates [ON/OFF] status of “D” position read by ICC unit through CAN communication
(TCM transmits ON/OFF condition of “D” position through CAN communication).
NP RANGE SW
[ON/OFF] ×Indicates PNP switch signal read by ICC unit through CAN communication (TCM trans-
mits PNP switch signal through CAN communication).

ACS-8
[ICC]
DESCRIPTION
Revision: 2006 December 2006 FX35/FX45
ABS actuator
and electric
unit (control
unit) VHCL SPEED SE
[km/h] or [mph] × Indicates vehicle speed calculated from wheel sensor by ICC unit through CAN commu-
nication (ABS actuator and electric unit (control unit) transmits wheel speed sensor sig-
nal through CAN communication).
BCM WIPER SW
[OFF/LOW/HIGH] ×
Indicates wiper [OFF/LOW/HIGH] status (BCM transmits front wiper request signal
through CAN communication).
Brake pres-
sure sensor PRESS SENS
[bar] Indicates brake fluid pressure value calculated from signal voltage of pressure sensor.
Release
switch RELEASE SW NO
[ON/OFF] Indicates [ON/OFF] status as judged from release switch signal.
ON when brake is depressed.
OFF when brake is not depressed.
RELEASE SW NC
[ON/OFF] Indicates [ON/OFF] status as judged from release switch signal.
ON when brake is not depressed.
OFF when brake is depressed.
ICC brake
switch BRAKE SW
[ON/OFF] Indicates [ON/OFF] status as judged from ICC brake switch signal.
Stop lamp
switch STOP LAMP SW
[ON/OFF] Indicates [ON/OFF] status as judged from stop lamp switch signal.
Input
Data monitored
Item [unit] CAN Description
OutputData monitored
Item [unit] CAN Description
ICC warning
chime BUZZER O/P
[ON/OFF] ×
Indicates [ON/OFF] status of ICC warning chime output.
ICC brake hold
relay STP LMP DRIVE
[ON/OFF] Indicates [ON/OFF] status of brake hold relay drive output.
Output CONSULT-ll ICC
[ACTIVE TEST] Item CAN Description
Combination
meter ICC BUZZER 1
×Able to start ICC warning chime with a driving signal from ICC unit.
METER LAMP ×Able to turn ICC system display ON with a driving signal from ICC unit.
ICC brake hold
relay STOP LAMP Able to start ICC brake hold relay with a driving signal from ICC unit.
Booster sole-
noid BOOSTER SOL/V
3 Able to start booster solenoid with a driving signal from ICC unit.

DESCRIPTION ACS-9
[ICC]
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Components DescriptionNKS003EL
CAN CommunicationNKS003EM
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tric control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
CAN COMMUNICATION UNIT
Refer to LAN-32, "CAN Communication Unit" .
Component Vehicle-to-
vehicle
distance
control mode Conventional
(fixed speed) cruise
control mode Brake assist
(with pre-
view func- tion) Description
ICC unit ××× Operates electric throttle control actuator and brake
booster based on that sensor signals and CAN commu-
nication data, then controls vehicle distance.
ICC sensor ×× Irradiates laser beam, and receives reflected laser
beam to measure distance from preceding vehicle.
ECM ××× Transmits throttle position signal and ICC steering
switch signal to ICC unit through CAN communication.
ABS actuator and electric
unit (control unit) ×××
Transmits wheel speed sensor signal to ICC unit
through CAN communication.
Brake pressure sensor ×× Detects fluid pressure in master cylinder.
Brake booster ×× Adjusts brake fluid pressure, based on command from
ICC unit.
BCM × Transmit front wiper request signal to ICC unit through
CAN communication.
TCM ×× Transmits gear position signal and output shaft revolu-
tion signal to ICC unit through CAN communication.
Unified meter and A/C amp. ××× Receives ICC system display signal, ICC warning lamp
signal and buzzer output signal from ICC unit through
CAN communication.
ICC brake switch, stop
lamp switch ××× Transmit operating signal to ICC unit when touching
brake pedal. ICC unit cancels cruise system at driver's
brake operation.
ICC brake hold relay × Receives stop lamp driving signal from ICC unit, and
turns stop lamp ON.
Parking brake switch ×× The cruise system is cancelled when applied.

ACS-32
[ICC]
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
Revision: 2006 December 2006 FX35/FX45
WORK SUPPORT
Work Item
Cause of Auto-Cancel
1. Touch “WORK SUPPORT” on the “SELECT DIAG MODE” screen. Refer to GI-38, "
CONSULT-II Start Procedure" .
2. Touch “CAUSE OF AUTO-CANCEL” on the “SELECT WORK ITEM” screen.
3. Cause of automatic cancellation screen will be shown. CAUTION:
Last five cancel (system cancel) causes are displayed.
Display Item List
Laser Beam Adjust
For details, refer to ACS-14, "LASER BEAM AIMING ADJUSTMENT" .
SELF-DIAGNOSTIC RESULTS
For details, refer to ACS-42, "Diagnostic Trouble Code (DTC) Chart" .
Operation Function
CAUSE OF AUTO-CANCEL Indicates causes of automatic cancellation of the ICC system.
LASER BEAM ADJUST Outputs laser beam, calculates dislocation of the beam, and indicates adjustment direction.
SKIA6191E
Cause of cancellation Description
OPERATING WIPER Windshield wipers were operated at HI or LO speed operation.
OPERATING ABS ABS function was operated.
OPERATING TCS TCS function was operated.
OPERATING VDC VDC function was operated.
OPE SW VOLT CIRC Outside the standard control switch input voltage was detected.
ECM CIRCUIT ECM did not permit ICC operation.
LASER SUN BEAM Intense light such as sunlight entered ICC sensor light sensing part.
LASER TEMP Temperature around ICC sensor became low.
OP SW DOUBLE TOUCH ICC steering switches were pressed at the same time.
WHL SPD ELEC NOISE Wheel speed sensor signal caught electromagnetic noise.
VDC/TCS OFF SW VDC OFF switch was pressed.
WHEEL SPD UNMATCH Wheel speed became different from AT vehicle speed.
TIRE SLIP Wheel slipped.
PKB SW ON Parking brake is applied.
IGN LOW VOLT Power supply voltage became low.
SNOW MODE SW Snow mode switch was pressed.
NO RECORD —

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION ACS-33
[ICC]
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DATA MONITOR
Operation Procedure
1. Touch “DATA MONITOR” on “SELECT DIAG MODE” screen. Refer to GI-38, "
CONSULT-II Start Procedure" .
2. Touch any of “ECU INPUT SIGNALS”, “MAIN SIGNALS” and “SELECTION FROM MENU” on selection screen.
3. Touch “START”.
4. Display the data monitor.
5. If necessary, touch “COPY” in turn, and print data.
Monitored Item
× : Applicable
PKIB0112E
Monitored Item
[unit] ECU INPUT
SIGNALS MAIN
SIGNALS SELEC-
TION FROM MENU Description
VHCL SPEED SE
[km/h] or [mph] ××× Indicates vehicle speed calculated from ICC unit through CAN
communication [ABS actuator and electric unit (control unit)
transmits wheel speed sensor signal through CAN communica-
tion].
SET VHCL SPD
[km/h] or [mph] ××Indicates set vehicle speed memorized in ICC unit.
THRTL OPENING
[%] ××× Indicates throttle angle read from ICC unit through CAN commu-
nication (ECM transmits throttle angle through CAN communi-
cation).
ENGINE RPM
[rpm] ×× Indicates engine speed read from ICC unit through CAN com-
munication (ECM transmits engine speed through CAN commu-
nication).
DISTANCE ADJ
[SHOR/MID/LONG] ××× Indicates set distance memorized in ICC unit.
WIPER SW
[OFF/LOW/HIGH] ×× Indicates wiper [OFF/LOW/HIGH] status (BCM transmits front
wiper request signal through CAN communication).
MAIN SW
[ON/OFF] ××× Indicates [ON/OFF] status as judged from ICC steering switch
signal (ECM transmits ICC steering switch signal through CAN
communication).
SET/COAST SW
[ON/OFF] ××× Indicates [ON/OFF] status as judged from ICC steering switch
signal (ECM transmits ICC steering switch signal through CAN
communication).
CANCEL SW
[ON/OFF] ××× Indicates [ON/OFF] status as judged from ICC steering switch
signal (ECM transmits ICC steering switch signal through CAN
communication).
RESUME/ACC SW
[ON/OFF] ××× Indicates [ON/OFF] status as judged from ICC steering switch
signal (ECM transmits ICC steering switch signal through CAN
communication).
CRUISE OPE
[ON/OFF] ××
Indicates whether controlling or not (ON means “controlling”).
BRAKE SW
[ON/OFF] ××× Indicates [ON/OFF] status as judged from ICC brake switch sig-
nal.
STOP LAMP SW
[ON/OFF] ××× Indicates [ON/OFF] status as judged from stop lamp switch sig-
nal.
RELEASE SW NO
[ON/OFF] ×× Indicates [ON/OFF] status as judged from release switch signal.
ON when brake is depressed.
OFF when brake is not depressed.

ACS-34
[ICC]
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
Revision: 2006 December 2006 FX35/FX45
RELEASE SW NC
[ON/OFF] ×× Indicates [ON/OFF] status as judged from release switch signal.
ON when brake is not depressed.
OFF when brake is depressed.
IDLE SW
[ON/OFF] ×× Indicates [ON/OFF] status of idle switch read from ICC unit
through CAN communication (ECM transmits ON/OFF status
through CAN communication).
GEAR
[1, 2, 3, 4, 5] ×× Indicates AT gear position read from ICC unit through CAN com-
munication (TCM transmits gear position through CAN commu-
nication).
BUZZER O/P
[ON/OFF] × Indicates [ON/OFF] status of ICC warning chime output.
ICC WARNING × NOTE:
This item is displayed, but cannot monitor.
VHCL SPD AT
[km/h] or [mph] × Indicates vehicle speed calculated from AT vehicle speed sen-
sor read from ICC unit through CAN communication (TCM
transmits AT vehicle speed sensor signal through CAN commu-
nication).
PRESS SENS
[bar] ×××
Indicates brake fluid pressure value calculated from signal volt-
age of pressure sensor.
PRESS SENS 2 ×× NOTE:
This item is displayed, but cannot monitor.
D RANGE SW
[ON/OFF] ×× Indicates [ON/OFF] status of “D” position read from ICC unit
through CAN communication (TCM transmits ON/OFF condition
of “D” position through CAN communication).
A/T OD OFF
[ON/OFF] × Indicates [ON/OFF] status of OD cancel output under control.
NP RANGE SW
[ON/OFF] ×× Indicates PNP switch signal read from ICC unit through CAN
communication (TCM transmits PNP switch signal through CAN
communication).
DISTANCE × NOTE:
This item is displayed, but cannot monitor.
RELATIVE SPD × NOTE:
This item is displayed, but cannot monitor.
STP LMP DRIVE
[ON/OFF] ××
Indicates [ON/OFF] status of brake hold relay drive output.
TURN SIGNAL ×× NOTE:
This item is displayed, but cannot monitor.
Monitored Item
[unit] ECU INPUT
SIGNALS MAIN
SIGNALS SELEC-
TION FROM MENU Description

ACS-42
[ICC]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Revision: 2006 December 2006 FX35/FX45
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMSPFP:00000
Diagnostic Trouble Code (DTC) ChartNKS003F3
× : Applicable
DTC No. CONSULT-II
screen terms ICC
system
warning lamp Fail-safe
Malfunctions detected where... Refer-
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Vehicle-
to-
vehicle
distance
control mode Conven-
tional
(fixed
speed) cruise
control
mode Brake
assist
(with
preview
function)
11 CONTROL UNIT ××××

ICC unit internal malfunctionACS-44
20 CAN COMM CIRCUIT ××××
ICC unit detected CAN communi-
cation malfunction. ACS-44
31 POWER SUPPLY CIR
××××
ICC unit power supply voltage is
excessively low (less than 8 V). ACS-44
34 POWER SUPPLY CIR2
××××
ICC unit power supply voltage is
excessively high (more than 19 V). ACS-44
41 VHCL SPEED SE CIRC
××××

Wheel sensor malfunction.

ABS actuator and electric unit (
control unit) malfunction

AT vehicle speed sensor malfunc-
tion

TCM malfunction ACS-45
43 ABS/TCS/VDC CIRC
××××
VDC/TCS/ABS system malfunc-
tion ACS-46
45 BRAKE SW/STOP L SW
××××

Brake and stop lamp switch har-
ness is open or shorted.

Brake and stop lamp switch is ON
or stuck to OFF.

Brake and stop lamp switch is
stuck to ON. ACS-46
46 OPERATION SW CIRC
×××

ICC steering switch harness or
spiral cable is open or shorted.

ICC steering switch malfunction ACS-48
61 PRESS SEN CIRCUIT
×× ×

Brake pressure sensor harness is
open or shorted.

Brake pressure sensor malfunc-
tion

Brake pressure sensor input circuit
malfunction ACS-50
62
BOOSTER SOL/V
CIRCUIT ×× ×

Solenoid harness is open or
shorted.

Solenoid is open.

Solenoid drive circuit malfunction ACS-51
63 RELEASE SW CIRCUIT
××××

Release switch harness is open or
shorted.

Release switch malfunction

Release switch input circuit mal-
function ACS-52
65 PRESSURE CONTROL
×× ×
Booster malfunctionACS-54
74 LASER BEAM OFF CNTR ×× ×
Laser beam of ICC sensor is off
the aiming point. ACS-55

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS ACS-43
[ICC]
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90 STOP LAMP RLY FIX ×× ×
Normally open terminal of stop
lamp relay is stuck. ACS-55
92 ECM CIRCUIT
××××

ECM malfunction

Accelerator pedal position sensor
malfunction

ICC unit malfunction ACS-61
96 NP RANGE
×××

Park/neutral position switch har-
ness is open or shorted.

Park/neutral position switch mal-
function.

TCM malfunction ACS-62
97 AT CIRCUIT
×××
TCM malfunctionACS-64
98 GEAR POSITION ×××

TCM malfunction

AT turbine revolution sensor mal-
function

AT vehicle speed sensor malfunc-
tion ACS-64
102 RADAR STAIN
×× ×
ICC sensor body window has con-
tamination. ACS-65
103 LASER SENSOR FAIL
×× ×
ICC sensor internal malfunctionACS-65
104 LASER AIMING INCMP ×× ×
Laser beam aiming of ICC sensor
is not adjusted. ACS-66
107 LASER COMM FAIL
×× ×

CAN data received by ICC sensor
is strange (from ICC unit, combi-
nation meter or ECM). ACS-66
109 LASER HIGH TEMP
×× ×
Temperature around ICC sensor is
excessively high. ACS-66
DTC
No. CONSULT-II
screen terms ICC
system
warning
lamp Fail-safe
Malfunctions detected where... Refer-
ence
page
Vehicle-
to-
vehicle
distance control
mode Conven-
tional
(fixed
speed)
cruise
control mode Brake
assist (with
preview
function)