speed sensor INFINITI M35 2006 Factory Service Manual

ACS-1
AUTO CRUISE CONTROL SYSTEM
K ELECTRICAL
CONTENTS
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ACS
Revision: 2006 January2006 M35/M45
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
System Diagram ....................................................... 6
Components Description .......................................... 7
CAN Communication ................................................ 7
CAN COMMUNICATION UNIT ............................. 7
Switch Operation ...................................................... 8
IN VEHICLE-TO-VEHICLE DISTANCE CON-
TROL MODE ......................................................... 8
IN CONVENTIONAL (FIXED SPEED) CRUISE
CONTROL MODE ................................................. 8
ICC System Display ................................................. 9
IN VEHICLE-TO-VEHICLE DISTANCE CON-
TROL MODE ......................................................... 9
IN CONVENTIONAL (FIXED SPEED) CRUISE
CONTROL MODE ................................................. 9
ACTION TEST .......................................................... 10
ICC System Running Test ...................................... 10
VEHICLE-TO-VEHICLE DISTANCE CONTROL
MODE ................................................................. 10
CONVENTIONAL (FIXED SPEED) CRUISE
CONTROL MODE ................................................ 11LASER BEAM AIMING ADJUSTMENT ................... 13
Outline .................................................................... 13
Preparation ............................................................. 13
Outline of Adjustment Procedure ............................ 13
Setting the ICC Target Board .................................. 13
ADJUSTING HEIGHT OF THE TARGET ............ 13
ADJUSTING THE RIGHT-LEFT POSITION OF
THE TARGET ...................................................... 14
SETTING THE TARGET ..................................... 14
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 ................. 26
Terminals and Reference Value for ICC Sensor Inte-
grated Unit .............................................................. 26
TROUBLE DIAGNOSIS - GENERAL DESCRIP-
TION .......................................................................
... 27
Fail-Safe Function .................................................. 27
Work Flow ............................................................... 27
CONSULT-II Function (ICC) ................................... 28
DESCRIPTION .................................................... 28
CONSULT-II BASIC OPERATION ....................... 28
WORK SUPPORT ............................................... 29
SELF-DIAGNOSTIC RESULTS ........................... 30
DATA MONITOR ................................................. 30
ACTIVE TEST ..................................................... 33
Self-Diagnostic Function ......................................... 34
WITH CONSULT-II .............................................. 34
WITHOUT CONSULT-II ....................................... 34
SELF-DIAGNOSIS BY DOT MATRIX LCD WILL
NOT RUN ............................................................ 36
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC
ITEMS ........................................................................ 39
Diagnostic Trouble Code (DTC) Chart ................... 39
DTC 0 CONTROL UNIT ......................................... 41
DTC 1 POWER SUPPLY CIR, DTC 2 POWER SUP-

ACS-2Revision: 2006 January2006 M35/M45 PLY CIR 2 ............................................................... 41
DTC 3 VHCL SPEED SE CIRC .............................. 42
DTC 4 ABS/TCS/VDC CIRC .................................. 42
DTC 5 BRAKE SW/STOP L SW ............................. 43
DTC 6 OPERATION SW CIRC ............................... 47
DTC 12 LASER BEAM OFFCNTR ......................... 48
DTC 13 STOP LAMP RLY FIX ............................... 49
DTC 14 ECM CIRCUIT ........................................... 55
DTC 15 GEAR POSITION ...................................... 56
DTC 16 RADAR STAIN .......................................... 57
DTC 18 LASER AIMING INCMP ............................ 57
DTC 21 UNIT HIGH TEMP ..................................... 57
DTC 24 NP RANGE ............................................... 58
DTC 25 SHIFT RANGE IND ................................... 58
DTC 26 ECD MODE MALF .................................... 59
DTC 27 ECD PWR SUPLY CIR .............................. 59
DTC 100 CAN COMM CIRCUIT ............................. 60
DTC 110 CONTROL UNIT (CAN) ........................... 60
TROUBLE DIAGNOSIS FOR SYMPTOMS .............. 61
Symptom Chart ....................................................... 61
Symptom 1: MAIN Switch Does Not Turn ON*
1 ,
MAIN Switch Does Not Turn OFF*
2 ........................ 62Symptom 2: ICC System Cannot Be Set (MAIN
Switch Turns ON/OFF) ............................................ 63
Symptom 3: ICC System Cannot Be Operated by
CANCEL Switch, RESUME/ACCELERATE Switch
or DISTANCE Switch .............................................. 64
Symptom 4: ICC System Is Not Cancelled When
the A/T Selector Lever Is In Other Than “D” and “M” ... 64
Symptom 5: Chime Does Not Sound ...................... 65
Symptom 6: Driving Force Is Hunting ..................... 66
Symptom 7: ICC System Frequently Cannot Detect
the Vehicle Ahead/ Detection Zone Is Short ........... 66
Symptom 8: The System Does Not Detect the Vehi-
cle Ahead at All ....................................................... 67
ELECTRICAL COMPONENT INSPECTION ............. 68
ICC Steering Switch ................................................ 68
ICC Brake Hold Relay ............................................. 68
ICC Brake Switch and Stop Lamp Switch ............... 68
REMOVAL AND INSTALLATION .............................. 69
ICC Sensor Integrated Unit ..................................... 69
REMOVAL ............................................................ 69
INSTALLATION .................................................... 69
ICC Steering Switch ................................................ 69

ACS-6
[ICC]
DESCRIPTION
Revision: 2006 January2006 M35/M45
DESCRIPTIONPFP:00000
OutlineNKS004CF
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
Vehicle-to-vehicle distance control mode, the driver can maintain the same speed as other vehicles without
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 ICC sensor integrated unit 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 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
depresses 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.
System DiagramNKS004CG
PKIB8345E

DESCRIPTION
ACS-7
[ICC]
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Components DescriptionNKS004CH
CAN CommunicationNKS004CI
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-34, "CAN Communication Unit" .
ComponentVehicle-to-
vehicle
distance
control modeConventional
(fixed speed)
cruise
control modeBrake assist
(with pre-
view func-
tion)Description
ICC sensor integrated unit
Controls vehicle distance by operating electric throttle
control actuator based on that sensor signals and
CAN communication data.
Controls vehicle distance by transmitting deceleration
degree commandment value signal to ABS actuator
and electric unit (control unit) when deceleration with
brake is needed.
Irradiates laser beam, and receives reflected laser
beam to measure distance from preceding vehicle.
ECM
Transmits accelerator pedal position signal, ICC brake
switch signal, stop lamp switch signal and ICC steering
switch signal to ICC sensor integrated unit through CAN
communication.
ABS actuator and electric
unit (control unit)
Transmits vehicle speed signal (wheel speed) and
stop lamp switch signal to ICC sensor integrated unit
through CAN communication.
Receives Deceleration degree commandment value
signal from ICC sensor integrated unit, and controls
brake fluid pressure with the ABS motor.
BCM
Transmits front wiper request signal to ICC sensor inte-
grated unit through CAN communication.
TCM
Transmits gear position signal and output shaft revolu-
tion signal to ICC sensor integrated unit through CAN
communication.
Unified meter and A/C amp.
Receives meter display signal, ICC warning lamp signal
and buzzer output signal from ICC sensor integrated
unit through CAN communication.
ICC brake switch
Transmits operating signal to ECM when depressing
brake pedal. ICC sensor integrated unit cancels cruise
system at driver's brake operation.
Stop lamp switch
Transmits operating signal to ECM and ABS actuator
and electric unit (control unit) when depressing brake
pedal. ICC sensor integrated unit cancels cruise system
at driver's brake operation.

ACS-30
[ICC]
TROUBLE DIAGNOSIS - GENERAL DESCRIPTION
Revision: 2006 January2006 M35/M45
Display Item List
Laser Beam Adjust
For details, refer to ACS-13, "LASER BEAM AIMING ADJUSTMENT" .
SELF-DIAGNOSTIC RESULTS
For details, refer to ACS-39, "Diagnostic Trouble Code (DTC) Chart" .
DATA MONITOR
Operation Procedure
1. Touch “DATA MONITOR” on “SELECT DIAG MODE” screen.
2. Touch any of “MAIN SIGNALS” and “SELECTION FROM
MENU” on selection screen.
3. Touch “START”.
4. Display the data monitor.
5. Touch “COPY” to print data if necessary.
Monitored Item
: Applicable 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 integrated unit light sensing part.
LASER TEMP Temperature around ICC sensor integrated unit 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 A/T vehicle speed.
TIRE SLIP Wheel slipped.
IGN LOW VOLT Power supply voltage became low.
SNOW MODE SW Snow mode switch was pressed.
VHCL SPD DOWN Vehicle speed becomes 20 MPH (32 km/h for CANADA models) and under.
VHCL SPD UNMATCH Vehicle speed becomes unusual.
NO RECORD —
PKIB8365E
Monitored Item [unit]MAIN
SIGNALSSELEC-
TION FROM
MENUDescription
VHCL SPEED SE
[km/h] or [mph]
Indicates vehicle speed calculated from ICC sensor integrated unit through
CAN communication [ABS actuator and electric unit (control unit) transmits
vehicle speed signal (wheel speed) through CAN communication].
SET VHCL SPD
[km/h] or [mph]
Indicates set vehicle speed memorized in ICC sensor integrated unit.
THRTL OPENING
[%]
Indicates throttle position read from ICC sensor integrated unit through CAN
communication (ECM transmits accelerator pedal position signal through
CAN communication).

TROUBLE DIAGNOSIS - GENERAL DESCRIPTION
ACS-31
[ICC]
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THRTL SENSOR
[deg]NOTE:
This item is displayed, but cannot monitor.
SET DISTANCE
[SHOR/MID/LONG]
Indicates set distance memorized in ICC sensor integrated unit.
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).
DISTANCE 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 signal (ECM
transmits ICC brake switch signal through CAN communication).
STOP LAMP SW
[ON/OFF]
Indicates [ON/OFF] status as judged from stop lamp switch signal (ECM
transmits stop lamp switch signal through CAN communication).
CRUISE LAMP
[ON/OFF]
Indicates [ON/OFF] status of MAIN switch indicator lamp output.
CLUTCH SW SIG
[ON/OFF]
NOTE:
This item is displayed, but cannot monitor.
NP SW SIG
[ON/OFF]
NOTE:
This item is displayed, but cannot monitor.
STP LMP DRIVE
[ON/OFF]
Indicates [ON/OFF] status of ICC brake hold relay drive output.
PWR SUP MONI
[V]
Indicates IGN voltage input by ICC sensor integrated unit.
IDLE SW
[ON/OFF]
Indicates [ON/OFF] status of idle switch read from ICC sensor integrated
unit through CAN communication (ECM transmits ON/OFF status through
CAN communication).
OWN VHCL
[ON/OFF]
Indicates [ON/OFF] status of own vehicle indicator output.
VHCL AHEAD
[ON/OFF]
Indicates [ON/OFF] status of vehicle ahead detection indicator output.
ICC WARNING
[ON/OFF]
Indicates [ON/OFF] status of ICC system warning lamp output.
BUZZER O/P
[ON/OFF]
Indicates [ON/OFF] status of ICC warning chime output.
ENGINE RPM
[rpm]
Indicates engine speed read from ICC sensor integrated unit through CAN
communication (ECM transmits engine speed through CAN communica-
tion).
WIPER SW
[OFF/LOW/HIGH]
Indicates wiper [OFF/LOW/HIGH] status (BCM transmits front wiper request
signal through CAN communication).
YAW R AT E
[deg/s]
NOTE:
This item is displayed, but cannot monitor.
D RANGE SW
[ON/OFF]
Indicates [ON/OFF] status of “D” and “M” positions read from ICC sensor
integrated unit through CAN communication; ON when position “D” and “M”
(TCM transmits A/T position indicator lamp signal through CAN communi-
cation). Monitored Item [unit]MAIN
SIGNALSSELEC-
TION FROM
MENUDescription

ACS-32
[ICC]
TROUBLE DIAGNOSIS - GENERAL DESCRIPTION
Revision: 2006 January2006 M35/M45
NP RANGE SW
[ON/OFF]Indicates A/T position indicator lamp signal read from ICC sensor integrated
unit through CAN communication (TCM transmits A/T position indicator
lamp signal through CAN communication).
VHCL SPD AT
[km/h] or [mph]
Indicates vehicle speed calculated from A/T vehicle speed sensor read from
ICC sensor integrated unit through CAN communication (TCM transmits A/
T vehicle speed sensor signal through CAN communication).
GEAR
[1, 2, 3, 4, 5]
Indicates A/T gear position read from ICC sensor integrated unit through
CAN communication (TCM transmits current gear position signal through
CAN communication).
MODE SIG
[OFF, ICC, ASCD]
Indicates the active mode from ICC or ASCD (conventional (fixed speed)
cruise control mode).
SET DISP IND
[ON/OFF]
Indicates [ON/OFF] status of SET switch indicator output.
DISTANCE
[m]
Indicates the distance from the vehicle ahead.
RELATIVE SPD
[m/s]
Indicates the relative speed of the vehicle ahead. Monitored Item [unit]MAIN
SIGNALSSELEC-
TION FROM
MENUDescription

TROUBLE DIAGNOSIS - GENERAL DESCRIPTION
ACS-35
[ICC]
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5. When self-diagnosis mode is started, DTC are shown on set vehicle speed indicator.
CAUTION:
DTC will disappear after 5 minutes.
When more than one malfunction is detected, a maximum of 3 code numbers can be stored; the
latest malfunction will be displayed first.
6. Check ACS-39, "
Diagnostic Trouble Code (DTC) Chart" , and repair or replace if necessary.
7. After repair, erase DTC stored in the ICC sensor integrated unit.
8. DTC 55 will be shown.
9. Turn ignition switch OFF to exit the diagnosis.
10. Perform ICC system running test (drive vehicle with ICC system ON), and make sure that ICC system
warning lamp (Orange) does not illuminate.
Self-Diagnostic Erasing Method
1. Stop the vehicle and turn ignition switch OFF.
2. Start engine and start self-diagnosis.
3. During self-diagnosis mode, press CANCEL switch 5 times, and
DISTANCE switch 5 times in this order.
CAUTION:
Press them within 10 seconds after pressing CANCEL
switch at first.
When operation is not completed within 10 seconds, start
again from step 2 above.
4. DTC 55 will be shown.
CAUTION:
DTC of an existing malfunction will not be erased.
5. Turn ignition switch OFF to exit the diagnosis.
6. Perform ICC system running test (drive vehicle with ICC system ON), and make sure that ICC system
warning lamp (Orange) does not illuminate.
PKIB8372E
PKIB8373E

TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
ACS-39
[ICC]
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TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMSPFP:25962
Diagnostic Trouble Code (DTC) ChartNKS004CZ
: Applicable
DTC
No.CONSULT-II
screen termsICC
system
warning
lampFail-safe
Malfunctions detected where...Refer-
ence
page Vehicle-
to-
vehicle
distance
control
modeConven-
tional
(fixed
speed)
cruise
control
modeBrake
assist
(with
preview
function)
0CONTROL UNIT
[C1A00]
ICC sensor integrated unit internal
malfunction.ACS-41
1POWER SUPPLY CIR
[C1A01]
ICC sensor integrated unit power
supply voltage is excessively low
(less than 8V).ACS-41
2POWER SUPPLY CIR 2
[C1A02]
ICC sensor integrated unit power
supply voltage is excessively high
(more than 19V).ACS-41
3VHCL SPEED SE CIRC
[C1A03]
Wheel sensor malfunction.
ABS actuator and electric unit
(control unit) malfunction.
A/T vehicle speed sensor mal-
function.
TCM malfunction.
ICC sensor integrated unit mal-
function.ACS-42
4ABS/TCS/VDC CIRC
[C1A04]VDC/TCS/ABS system malfunc-
tion.ACS-42
5BRAKE SW/STOP L SW
[C1A05]
Stop lamp switch harness is open
or shorted.
Stop lamp switch is stuck to OFF.
ICC brake switch or stop lamp
switch is stuck to ON.
ECM malfunction.
ABS actuator and electric unit
(control unit) malfunction.ACS-43
6OPERATION SW CIRC
[C1A06]
ICC steering switch harness or
spiral cable is open or shorted.
ICC steering switch malfunction.ACS-47
12LASER BEAM OFFCNTR
[C1A12]Laser beam of ICC sensor inte-
grated unit is off the aiming point.ACS-48
13STOP LAMP RLY FIX
[C1A13]
Normally open terminal of ICC
brake hold relay is stuck.
Improper installation of ICC brake
switch or stop lamp switch.
ICC brake switch malfunction.
ECM malfunction.
ABS actuator and electric unit
(control unit) malfunction.ACS-49

ACS-40
[ICC]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Revision: 2006 January2006 M35/M45
14ECM CIRCUIT
[C1A14]
ECM malfunction.
Accelerator pedal position sensor
malfunction.
ICC sensor integrated unit mal-
function.ACS-55
15GEAR POSITION
[C1A15]
TCM malfunction.
A/T turbine revolution sensor mal-
function.
A/T vehicle speed sensor mal-
function.ACS-56
16RADAR STAIN
[C1A16]ICC sensor integrated unit body
window has contamination.ACS-57
18LASER AIMING INCMP
[C1A18]Laser beam aiming of ICC sensor
integrated unit is not adjusted.ACS-57
21UNIT HIGH TEMP
[C1A21]Temperature around ICC sensor
integrated unit is excessively high.ACS-57
24NP RANGE
[C1A24]
Park/neutral position switch mal-
function.
TCM malfunction.ACS-58
25 SHIFT RANGE IND
[C1A25]TCM malfunction.ACS-58
26ECD MODE MALF
[C1A26]
ABS actuator and electric unit
(control unit) malfunction.
ICC sensor integrated unit mal-
function.ACS-59
27ECD PWR SUPLY CIR
[C1A27]
ABS actuator and electric unit
(control unit) power supply voltage
is excessively low.
ABS actuator and electric unit
(control unit) malfunction.ACS-59
55NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.No malfunction item has been
detected. —
100CAN COMM CIRCUIT
[U1000]
ICC sensor integrated unit detects
CAN communication malfunction.ACS-60
11 0CONTROL UNIT (CAN)
[U1010]
ICC sensor integrated unit detects
malfunction by CAN initial diagno-
sis.ACS-60
DTC
No.CONSULT-II
screen termsICC
system
warning
lampFail-safe
Malfunctions detected where...Refer-
ence
page Vehicle-
to-
vehicle
d i s t a n c e
control
modeConven-
tional
(fixed
speed)
cruise
control
modeBrake
assist
(with
preview
function)