ABS INFINITI FX35 2007 Service Manual

ACS-1
AUTO CRUISE CONTROL SYSTEM
K ELECTRICAL
CONTENTS
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Revision: 2006 July 2007 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-8
[ICC]
DESCRIPTION
Revision: 2006 July 2007 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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Revision: 2006 July 2007 FX35/FX45
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-49, "CAN System Specification Chart" .
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 July 2007 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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Revision: 2006 July 2007 FX35/FX45
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-42
[ICC]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Revision: 2006 July 2007 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-
ence
page
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-45
[ICC]
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Revision: 2006 July 2007 FX35/FX45
3. CHECK GROUND CIRCUIT FOR ICC UNIT
1. Turn ignition switch OFF.
2. Disconnect ICC unit connector.
3. Check continuity between ICC unit harness connector and ground.
OK or NG
OK >> 1. Replace ICC unit. 2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.
NG >> 1. Repair ICC unit ground harness. 2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.
DTC 41 VHCL SPEED SE CIRCNKS003F7
1. CHECK ICC UNIT SELF-DIAGNOSIS
1. Perform self-diagnosis.
2. Check if “DTC 43 ABS/TCS/VDC CIRC” or “DTC 20 CAN COMM CIRCUIT” other than “DTC 41 VHCL SPEED SE CIRC” is indicated in self-diagnosis item in the display.
Is any indicated?
YES >> 1. Repair or replace applicable item. 2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.
NO >> GO TO 2.
2. CHECK AT VEHICLE SPEED SENSOR
With CONSULT-II
With “DATA MONITOR”, check “VHCL SPD AT” operates normally. Refer to ACS-33, "
DATA MONITOR" .
OK or NG
OK >> 1. Replace ICC unit. 2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.
NG >> 1. Perform “A/T” self-diagnosis. 2. After repairing or replacing applicable item, erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.
ICC unit con-
nector Terminal
Ground Continuity
M88 19
Ye s
20
M89 46
SKIA6650E

ACS-46
[ICC]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Revision: 2006 July 2007 FX35/FX45
DTC 43 ABS/TCS/VDC CIRCNKS003F8
1. CHECK ICC UNIT SELF-DIAGNOSIS
With CONSULT-II
1. Perform self-diagnosis.
2. Check if “DTC 20 CAN COMM CIRCUIT” other than “DTC 43 ABS/TCS/VDC CIRC” is indicated in self- diagnosis item in the display.
Is it indicated?
YES >> 1. Repair or replace applicable item. 2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.
NO >> GO TO 2.
2. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAGNOSIS
With CONSULT-II
1. Perform self-diagnosis of ABS actuator and electric unit (control unit). Refer to BRC-11, "
TROUBLE
DIAGNOSIS" .
2. Check if malfunction is indicated.
Is malfunction indicated?
YES >> 1. Repair or replace applicable item. 2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.
NO >> 1. Replace ICC unit. 2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.
DTC 45 BRAKE SW/STOP L SWNKS003F9
1. CHECK CONNECTOR FOR ICC UNIT
1. Turn ignition switch OFF.
2. Disconnect ICC unit connector, and connect it securely again.
3. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.
Is malfunction indicated?
YES >> GO TO 2.
NO >> Poor connector connection
1. Check connector. (Check connector housing for disconnected, loose, bent, and collapsed ter- minals. If any malfunction is detected, repair applicable part.)
2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.
2. CHECK STOP LAMP SWITCH AND ICC BRAKE SWITCH
With CONSULT-II
With “DATA MONITOR”, check if “STOP LAMP SW” and “BRAKE SW” are operated normally. Refer to ACS-
33, "DATA MONITOR" .
OK or NG
OK >> 1. Replace ICC unit. 2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.
NG >>

BRAKE SW: GO TO 3.

STOP LAMP SW: GO TO 5.

ACS-64
[ICC]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Revision: 2006 July 2007 FX35/FX45
DTC 97 AT CIRCUITNKS003FJ
1. CHECK AT CIRCUIT
With CONSULT-II
With TCM diagnosis, check that shift operates normally. Refer to AT- 11 2 , "
DTC P0705 PARK/NEUTRAL
POSITION SWITCH" .
OK or NG
OK >> 1. Replace ICC unit. 2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.
NG >> 1. Perform TCM self-diagnosis. 2. After repairing or replacing applicable item, erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.
DTC 98 GEAR POSITIONNKS003FK
1. CHECK ICC UNIT SELF-DIAGNOSIS
With CONSULT-II
1. Perform self-diagnosis.
2. Check if “DTC 43 ABS/TCS/VDC CIRC” or “DTC 41 VHCL SPEED SE CIRC” other than “DTC 98 GEAR POSITION” is indicated in self-diagnosis item in the display.
Is any indicated?
YES >> 1. Repair or replace applicable item. 2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.
NO >> GO TO 2.
2. CHECK VEHICLE SPEED SIGNAL
With CONSULT-II
With “DATA MONITOR”, check that “VHCL SPEED SE” is normal.
OK or NG
OK >> GO TO 3.
NG >> 1. Replace ICC unit.
2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.
3. CHECK SHIFT GEAR POSITION
Check that gear positions are correct in A/T.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4. CHECK TCM GEAR POSITION SIGNAL
With CONSULT-II
With TCM “DATA MONITOR” with CONSULT-II, check that gear positions are correct.
OK or NG
OK >> 1. Replace ICC unit. 2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.
NG >> 1. Perform TCM self-diagnosis.
2. After repairing or replacing applicable item, erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.

A/T CONTROL SYSTEM AT-37
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Revision: 2006 July 2007 FX35/FX45
Lock-up ControlNCS001B4
The torque converter clutch piston in the torque converter is engaged to eliminate torque converter slip to
increase power transmission efficiency.
The torque converter clutch control valve operation is controlled by the torque converter clutch solenoid valve,
which is controlled by a signal from TCM, and the torque converter clutch control valve engages or releases
the torque converter clutch piston.
Lock-up Operation Condition Table
TORQUE CONVERTER CLUTCH CONTROL VALVE CONTROL
Lock-up Control System Diagram
Lock-up Released
In the lock-up released state, the torque converter clutch control valve is set into the unlocked state by the
torque converter clutch solenoid and the lock-up apply pressure is drained.
In this way, the torque converter clutch piston is not coupled.
Lock-up Applied
In the lock-up applied state, the torque converter clutch control valve is set into the locked state by the torque
converter clutch solenoid and lock-up apply pressure is generated.
In this way, the torque converter clutch piston is pressed and coupled.
SMOOTH LOCK-UP CONTROL
When shifting from the lock-up released state to the lock-up applied state, the current output to the torque con-
verter clutch solenoid is controlled with the TCM. In this way, when shifting to the lock-up applied state, the
torque converter clutch is temporarily set to the half-clutched state to reduce the shock.
Half-clutched State
The current output from the TCM to the torque converter clutch solenoid is varied to gradually increase the
torque converter clutch solenoid pressure.
In this way, the lock-up apply pressure gradually rises and while the torque converter clutch piston is put into
half-clutched status, the torque converter clutch piston operating pressure is increased and the coupling is
completed smoothly.
Slip Lock-up Control
In the slip region, the torque converter clutch solenoid current is controlled with the TCM to put it into the half-
clutched state. This absorbs the engine torque fluctuation and lock-up operates from low speed.
selector lever D position M5 position M4 position M3 position
Gear position 54543
Lock-up ×–×××
Slip lock-up ××–––
PCIA0014E