2007 INFINITI M35 ecm

ACS-2Revision: 2007 April2007 M35/M45 PLY CIR 2 ............................................................... 42
DTC 3 VHCL SPEED SE CIRC .............................. 43
DTC 4 ABS/TCS/VDC CIRC .................................. 43
DTC 5 BRAKE SW/STOP L SW ............................. 44
DTC 6 OPERATION SW CIRC ............................... 48
DTC 12 LASER BEAM OFFCNTR ......................... 49
DTC 13 STOP LAMP RLY FIX ............................... 50
DTC 14 ECM CIRCUIT ........................................... 56
DTC 15 GEAR POSITION ...................................... 57
DTC 16 RADAR STAIN .......................................... 58
DTC 18 LASER AIMING INCMP ............................ 58
DTC 21 UNIT HIGH TEMP ..................................... 58
DTC 24 NP RANGE ............................................... 59
DTC 25 SHIFT RANGE IND ................................... 59
DTC 26 ECD MODE MALF .................................... 60
DTC 27 ECD PWR SUPLY CIR .............................. 60
DTC 100 CAN COMM CIRCUIT ............................. 61
DTC 110 CONTROL UNIT (CAN) ........................... 61
TROUBLE DIAGNOSIS FOR SYMPTOMS .............. 62
Symptom Chart ....................................................... 62
Symptom 1: MAIN Switch Does Not Turn ON*
1 ,
MAIN Switch Does Not Turn OFF*
2 ........................ 63Symptom 2: ICC System Cannot Be Set (MAIN
Switch Turns ON/OFF) ............................................ 64
Symptom 3: ICC System Cannot Be Operated by
CANCEL Switch, RESUME/ACCELERATE Switch
or DISTANCE Switch .............................................. 65
Symptom 4: ICC System Is Not Cancelled When
the A/T Selector Lever Is In Other Than “D” and “M” ... 65
Symptom 5: Chime Does Not Sound ...................... 66
Symptom 6: Driving Force Is Hunting ..................... 67
Symptom 7: ICC System Frequently Cannot Detect
the Vehicle Ahead/ Detection Zone Is Short ........... 67
Symptom 8: The System Does Not Detect the Vehi-
cle Ahead at All ....................................................... 68
ELECTRICAL COMPONENT INSPECTION ............. 69
ICC Steering Switch ................................................ 69
ICC Brake Hold Relay ............................................. 69
ICC Brake Switch and Stop Lamp Switch ............... 69
REMOVAL AND INSTALLATION .............................. 70
ICC Sensor Integrated Unit ..................................... 70
REMOVAL ............................................................ 70
INSTALLATION .................................................... 70
ICC Steering Switch ................................................ 70

DESCRIPTION
ACS-7
[ICC]
C
D
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MA
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ACS
Revision: 2007 April2007 M35/M45
Functional DiagramNKS004F8
Items of input/output signal to be checked with CONSULT-II

Items of input signal to be checked with “DATA MONITOR”.
SKIB9221E
Signal name CAN Transmission unitMonitored Item
[unit]Description
Accelerator pedal
position signal×
ECMTHRTL OPENING
[%]ICC sensor integrated unit receives accelerator pedal posi-
tion signal from ECM with CAN communication.
ICC steering switch
signal×MAIN SW
[ON/OFF]
ICC sensor integrated unit receives ICC steering switch sig-
nal from ECM with CAN communication. ×SET/COAST SW
[ON/OFF]
×CANCEL SW
[ON/OFF]
×RESUME/ACC SW
[ON/OFF]
×DISTANCE SW
[ON/OFF]
ICC brake switch
signal×BRAKE SW
[ON/OFF]ICC sensor integrated unit receives ICC brake switch signal
from ECM with CAN communication.
Stop lamp switch
signal×STOP LAMP SW
[ON/OFF]ICC sensor integrated unit receives stop lamp switch signal
from ECM with CAN communication.
Closed throttle
position signal×IDLE SW
[ON/OFF]ICC sensor integrated unit receives closed throttle position
signal from ECM with CAN communication.
Engine speed sig-
nal×ENGINE RPM
[rpm]ICC sensor integrated unit receives engine speed signal from
ECM with CAN communication.

DESCRIPTION
ACS-9
[ICC]
C
D
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ACS
Revision: 2007 April2007 M35/M45
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-52, "CAN Communication Signal Chart" .
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.

TROUBLE DIAGNOSIS - GENERAL DESCRIPTION
ACS-31
[ICC]
C
D
E
F
G
H
I
J
L
MA
B
ACS
Revision: 2007 April2007 M35/M45
Display Item List
Laser Beam Adjust
For details, refer to ACS-15, "LASER BEAM AIMING ADJUSTMENT" .
SELF-DIAGNOSTIC RESULTS
For details, refer to ACS-40, "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).

ACS-32
[ICC]
TROUBLE DIAGNOSIS - GENERAL DESCRIPTION
Revision: 2007 April2007 M35/M45
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-36
[ICC]
TROUBLE DIAGNOSIS - GENERAL DESCRIPTION
Revision: 2007 April2007 M35/M45
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.
SELF-DIAGNOSIS BY DOT MATRIX LCD WILL NOT RUN
Possible Irregular Condition
PKIB8373E
PKIB8374E
Open or short lines Symptoms Malfunction causes
ICC sensor integrated unit power supply
malfunctionNo voltage supply from ignition switch Fuse blown.
Harness open.
Harness shorted.
Ground cable not connected Harness open.
Harness shorted.
ICC steering switch malfunction No signal transmitted Harness open.
Harness shorted.
Spiral cable open.
Spiral cable shorted.
ICC steering switch or ECM malfunction.
CAN communication system malfunction Signal not transmitted Harness open.
Harness shorted.
CAN communication malfunction.
Combination meter system malfunction Indication not possible Combination meter malfunction.
Unified meter and A/C amp. malfunction.
Dot matrix LCD malfunction.
ICC sensor integrated unit malfunctionICC sensor integrated unit internal mal-
function.

ACS-38
[ICC]
TROUBLE DIAGNOSIS - GENERAL DESCRIPTION
Revision: 2007 April2007 M35/M45
5. CHECK CONNECTOR FOR ICC SENSOR INTEGRATED UNIT
1. Check terminals for bend and looseness.
2. Securely connect ICC sensor integrated unit connector again.
3. Perform self-diagnosis without CONSULT-II. Refer toACS-35, "
WITHOUT CONSULT-II" .
Can self
-diagnosis be performed?
YES >> Check connector. (Check connector housing for disconnected, loose, bent, and collapsed termi-
nals. If any malfunction is detected, repair applicable part.)
NO >> GO TO 6.
6. CHECK ICC STEERING SWITCH
Check ICC steering switch. Refer to ACS-69, "
ICC Steering Switch" .
OK or NG
OK >> GO TO 7.
NG >> Replace ICC steering switch.
7. CHECK HARNESS BETWEEN ECM AND ICC STEERING SWITCH
1. Turn ignition switch OFF.
2. Disconnect ECM connector.
3. Check resistance between ECM harness connector.
4. Check continuity between ECM harness connector and ground.
OK or NG
OK >> GO TO 8.
NG >> Repair or replace harness between ECM and ICC steer-
ing switch.
8. CHECK CONNECTOR FOR ECM
1. Check terminals for bend and looseness.
2. Securely connect ECM connector again.
3. Perform self-diagnosis without CONSULT-II. Refer to ACS-35, "
WITHOUT CONSULT-II" .
Can self
-diagnosis be performed?
YES >> Check connector. (Check connector housing for disconnected, loose, bent, and collapsed termi-
nals. If any malfunction is detected, repair applicable part.)
NO >> GO TO 9.
ECM
connectorTerminal ECM
connectorTerminal ConditionResis-
tance
(Approx.)
F108 67 M71 99When MAIN switch
pressed0 Ω
When MAIN switch
released5.5 kΩ
PKIB8377E
ECM connector Terminal
GroundContinuity
F108 67 No
M71 99 No
PKIB8378E

ACS-40
[ICC]
TROUBLE DIAGNOSIS FOR SELF-DIAGNOSTIC ITEMS
Revision: 2007 April2007 M35/M45
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-42
1POWER SUPPLY CIR
[C1A01]××××

ICC sensor integrated unit power
supply voltage is excessively low
(less than 8V).ACS-42
2POWER SUPPLY CIR 2
[C1A02]××××

ICC sensor integrated unit power
supply voltage is excessively high
(more than 19V).ACS-42
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-43
4ABS/TCS/VDC CIRC
[C1A04]××××
VDC/TCS/ABS system malfunc-
tion.ACS-43
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-44
6OPERATION SW CIRC
[C1A06]×××

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

ICC steering switch malfunction.ACS-48
12LASER BEAM OFFCNTR
[C1A12]×× ×
Laser beam of ICC sensor inte-
grated unit is off the aiming point.ACS-49
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-50