2004 INFINITI FX35 cruise control

AUTOMATIC SPEED CONTROL DEVICE (ASCD)
EC-657
[VQ35DE]
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Revision: 2004 November 2004 FX35/FX45
AUTOMATIC SPEED CONTROL DEVICE (ASCD)PFP:18930
System DescriptionABS006ZG
INPUT/OUTPUT SIGNAL CHART
*: This signal is sent to the ECM through CAN communication line.
BASIC ASCD SYSTEM
Refer to Owner's Manual for ASCD operating instructions.
Automatic Speed Control Device (ASCD) allows a driver to keep vehicle at predetermined constant speed
without depressing accelerator pedal. Driver can set vehicle speed in advance between approximately 40 km/
h (25 MPH) and 144 km/h (89 MPH).
ECM controls throttle angle of electric throttle control actuator to regulate engine speed.
Operation status of ASCD is indicated by CRUISE indicator and SET indicator in combination meter. If any
malfunction occurs in ASCD system, it automatically deactivates control.
SET OPERATION
Press ON/OFF(MAIN)) switch. (The CRUISE indicator in combination meter illuminates.)
When vehicle speed reaches a desired speed between approximately 40 km/h (25 MPH) and 144 km/h (89
MPH), press COAST/SET switch. (Then SET indicator in combination meter illuminates.)
ACCEL OPERATION
If the ACCEL/RESUME switch is pressed during cruise control driving, increase the vehicle speed until the
switch is released or vehicle speed reaches maximum speed controlled by the system.
And then ASCD will keep the new set speed.
CANCEL OPERATION
When any of following conditions exist, cruise operation will be canceled.

CANCEL switch is pressed

More than 2 switches at ASCD steering switch are pressed at the same time (Set speed will be cleared)

Brake pedal is depressed

Selector lever is changed to N, P, R position

Vehicle speed decreased to 13 km/h (8 MPH) lower than the set speed

VDC/TCS system is operated
When the ECM detects any of the following conditions, the ECM will cancel the cruise operation and inform
the driver by blinking indicator lamp.

Engine coolant temperature is slightly higher than the normal operating temperature, CRUISE lamp may
blink slowly.
When the engine coolant temperature decreases to the normal operating temperature, CRUISE lamp will
stop blinking and the cruise operation will be able to work by depressing COAST/SET switch or ACCEL/
RESUME switch.

Malfunction for some self-diagnoses regarding ASCD control: SET lamp will blink quickly.
If ON/OFF(MAIN) switch is turned to OFF during ASCD is activated, all of ASCD operations will be canceled
and vehicle speed memory will be erased.
COAST OPERATION
When the COAST/SET switch is pressed during cruise control driving, decrease vehicle set speed until the
switch is released. And then ASCD will keep the new set speed.
Sensor Input signal to ECM ECM function Actuator
ASCD brake switch Brake pedal operation
ASCD vehicle speed controlElectric throttle control
actuator Stop lamp switch Brake pedal operation
ASCD steering switch ASCD steering switch operation
Park/Neutral position (PNP)
switchGear position
Unified meter and A/C amp.* Vehicle speed
TCM* Powertrain revolution

EC-768
[VK45DE]
TROUBLE DIAGNOSIS
Revision: 2004 November 2004 FX35/FX45
NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.HO2S2 HTR (B1)
[ON/OFF]

Indicates [ON/OFF] condition of heated
oxygen sensor 2 heater determined by
ECM according to the input signals. HO2S2 HTR (B2)
[ON/OFF]
I/P PULLY SPD
[rpm]

Indicates the engine speed computed from
the turbine revolution sensor signal.
VEHICLE SPEED
[km/h] or [MPH]

Indicates the vehicle speed computed from
the revolution sensor signal.
IDL A/V LEARN
[YET/CMPLT]

Display the condition of idle air volume
learning
YET: Idle air volume learning has not been
performed yet.
CMPLT: Idle air volume learning has
already been performed successfully.
TRVL AFTER MIL
[km] or [mile]

Distance traveled while MIL is activated.
O2SEN HTR DTY
[%]

Indicates the heated oxygen sensor 1
heater control value computed by the ECM
according to the input signals.
AC PRESS SEN [V]

The signal voltage from the refrigerant
pressure sensor is displayed.
VHCL SPEED SE
[km/h] or [mph]

The vehicle speed computed from the vehi-
cle speed signal sent from TCM is dis-
played.
MAIN SW
[ON/OFF]

Indicates [ON/OFF] condition from ON/OFF
(MAIN) switch signal.
CANCEL SW
[ON/OFF]

Indicates [ON/OFF] condition from CAN-
CEL switch signal.
RESUME/ACC SW
[ON/OFF]

Indicates [ON/OFF] condition from ACCEL/
RESUME switch signal.
SET SW
[ON/OFF]

Indicates [ON/OFF] condition from COAST/
SET switch signal.
BRAKE SW1
[ON/OFF]

Indicates [ON/OFF] condition from ASCD
brake switch signal.
BRAKE SW2
[ON/OFF]

Indicates [ON/OFF] condition of stop lamp
switch signal.
DIST SW
[ON/OFF]

Indicates [ON/OFF] condition from DIS-
TANCE switch signal.
CRUISE LAMP
[ON/OFF]

Indicates [ON/OFF] condition of CRUISE
lamp determined by the ECM according to
the input signals.
Voltage [V]

Voltage, frequency, duty cycle or pulse
width measured by the probe.

Only “#” is displayed if item is unable
to be measured.

Figures with “#”s are temporary ones.
They are the same figures as an
actual piece of data which was just
previously measured. Frequency [msec],
[Hz] or [%]
DUTY-HI
DUTY-LOW
PLS WIDTH-HI
PLS WIDTH-LOWMonitored item [Unit]ECM
INPUT
SIG-
NALSMAIN
SIG-
NALSDescription Remarks

ASCD INDICATOR
EC-1309
[VK45DE]
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Revision: 2004 November 2004 FX35/FX45
ASCD INDICATORPFP:24814
Component DescriptionABS00CFH
ASCD indicator lamp illuminates to indicate ASCD operation status. Lamp has two indicators, CRUISE and
SET, and is integrated in combination meter.
CRUISE indicator illuminates when ON/OFF (MAIN) switch on ASCD steering switch is turned ON to indicated
that ASCD system is ready for operation.
SET indicator illuminates when following conditions are met.

CRUISE indicator is illuminated.

COAST/SET switch on ASCD steering switch is turned ON while vehicle speed is within the range of
ASCD setting.
SET indicator remains lit during ASCD control.
Refer to EC-1334, "
AUTOMATIC SPEED CONTROL DEVICE (ASCD)" for the ASCD function.
CONSULT-II Reference Value in Data Monitor ModeABS00CFI
Specification data are reference value.
MONITOR ITEM CONDITION SPECIFICATION
CRUISE LAMP

Ignition switch: ON

ON/OFF (MAIN) switch:
Pressed at the 1st time → at the
2nd timeON → OFF
SET LAMP

ON/OFF (MAIN) switch: ON

When vehicle speed is
between 40 km/h (25 MPH)
and 144 km/h (89 MPH)

ASCD is operating ON

ASCD is not operating OFF

EC-1334
[VK45DE]
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
Revision: 2004 November 2004 FX35/FX45
AUTOMATIC SPEED CONTROL DEVICE (ASCD)PFP:18930
System DescriptionABS00CG0
INPUT/OUTPUT SIGNAL CHART
*: This signal is sent to the ECM through CAN communication line.
BASIC ASCD SYSTEM
Refer to Owner's Manual for ASCD operating instructions.
Automatic Speed Control Device (ASCD) allows a driver to keep vehicle at predetermined constant speed
without pressing accelerator pedal. Driver can set vehicle speed in advance between approximately 40 km/h
(25 MPH) and 144 km/h (89 MPH).
ECM controls throttle angle of electric throttle control actuator to regulate engine speed.
Operation status of ASCD is indicated by CRUISE indicator and SET indicator in combination meter. If any
malfunction occurs in ASCD system, it automatically deactivates control.
SET OPERATION
Press ON/OFF (MAIN) switch. (The CRUISE indicator in combination meter illuminates.)
When vehicle speed reaches a desired speed between approximately 40 km/h (25 MPH) and 144 km/h (89
MPH), press COAST/SET switch. (Then SET indicator in combination meter illuminates.)
ACCEL OPERATION
If the ACCEL/RESUME switch is pressed during cruise control driving, increase the vehicle speed until the
switch is released or vehicle speed reaches maximum speed controlled by the system.
And then ASCD will keep the new set speed.
CANCEL OPERATION
When any of following conditions exist, cruise operation will be canceled.

CANCEL switch is pressed

More than 2 switches at ASCD steering switch are pressed at the same time (Set speed will be cleared)

Brake pedal is depressed

Selector lever is changed to N, P, R position

Vehicle speed decreased to 13 km/h (8 MPH) lower than the set speed

VDC/TCS system is operated
When the ECM detects any of the following conditions, the ECM will cancel the cruise operation and inform
the driver by blinking indicator lamp.

Engine coolant temperature is slightly higher than the normal operating temperature, CRUISE lamp may
blink slowly.
When the engine coolant temperature decreases to the normal operating temperature, CRUISE lamp will
stop blinking and the cruise operation will be able to work by pressing COAST/SET switch or ACCEL/
RESUME switch.

Malfunction for some self-diagnoses regarding ASCD control: SET lamp will blink quickly.
If ON/OFF (MAIN) switch is turned to OFF during ASCD is activated, all of ASCD operations will be canceled
and vehicle speed memory will be erased.
COAST OPERATION
When the COAST/SET switch is pressed during cruise control driving, decrease vehicle set speed until the
switch is released. And then ASCD will keep the new set speed.
Sensor Input signal to ECM ECM function Actuator
ASCD brake switch Brake pedal operation
ASCD vehicle speed controlElectric throttle control
actuator Stop lamp switch Brake pedal operation
ASCD steering switch ASCD steering switch operation
Park/Neutral position (PNP)
switchGear position
Unified meter and A/C amp.* Vehicle speed
TCM* Powertrain revolution

IDX-5
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IDX
ALPHABETICAL INDEX
LT-73
Headlining - See Roof trim .................................. EI-42
Heated oxygen sensor 1 (bank 1) .... EC-205, EC-214,
EC-226
, EC-433, EC-439, EC-863, EC-872, EC-884,
EC-1103
, EC-1109
Heated oxygen sensor 1 (bank 2) .... EC-205, EC-214,
EC-226
, EC-433, EC-439, EC-863, EC-872, EC-884,
EC-1103
, EC-1109
Heated oxygen sensor 1 heater (bank 1) ....... EC-149,
EC-806
Heated oxygen sensor 1 heater (bank 2) ....... EC-149,
EC-806
Heated oxygen sensor 2 (bank 1) .... EC-236, EC-245,
EC-446
, EC-457, EC-894, EC-903, EC-1116, EC-1127
Heated oxygen sensor 2 (bank 2) .... EC-236, EC-245,
EC-446
, EC-457, EC-894, EC-903, EC-1116, EC-1127
Heated oxygen sensor 2 heater (bank 1) ....... EC-157,
EC-814
Heated oxygen sensor 2 heater (bank 2) ....... EC-157,
EC-814
Heated seat ....................................................... SE-98
Heater and cooling unit (Heater core) ........... ATC-126
HFC134a (R134a) system precaution ............... ATC-5
HFC134a (R134a) system service procedure ATC-137
HFC134a (R134a) system service tools .......... ATC-18
HFC134a system service equipment precaution ..........
ATC-13
High & low reverse clutch solenoid valve ....... AT-164,
AT-166
Hood ................................................................... BL-14
Horn ................................................................. WW-56
HORN - Wiring diagram ................................... WW-56
HSEAT - Wiring diagram ................................... SE-99
I
IATS - Wiring diagram ....................... EC-182
, EC-839
ICC - Wiring diagram ....................................... ACS-20
ICC/BS - Wiring diagram ................. EC-524, EC-1191
ICC/SW - Wiring diagram ................ EC-510, EC-1176
ICCBOF - Wiring diagram ................ EC-616, EC-1294
Idle air volume learning ....................... EC-49, EC-698
Idle mixture ratio .................................. EC-38, EC-687
Idle speed ............................................ EC-38, EC-687
Idle speed control (ISC) .... EC-392, EC-394, EC-1048,
EC-1050
Ignition coil ....................................... EC-585, EC-1262
Ignition coil(VK45DE) ...................................... EM-185
Ignition coil(VQ35DE) ........................................ EM-42
Ignition control system ..................... EC-585, EC-1262
Ignition key hole illumination ............................. LT-153
Ignition timing ...................................... EC-38, EC-687
IGNSYS - Wiring diagram ................ EC-586, EC-1263
Illumination control ............................................ LT-197
In vehicle sensor ........................... ATC-107, ATC-118
INF/D - Wring diagram ....................................... AV-63
INJECT - Wiring diagram ................. EC-598, EC-1275
Injector ............................................. EC-597, EC-1274
Input clutch solenoid valve ................. AT-152, AT-154
Instrument panel ................................................. IP-10
Intake air temperature sensor ........... EC-180, EC-200,
EC-837
, EC-858
Intake door control linkage adjustment ............ ATC-78
Intake door motor ............................ ATC-76, ATC-124
Intake manifold(VK45DE) ............................... EM-174
Intake manifold(VQ35DE) ................................. EM-24
Intake sensor ................................ ATC-113, ATC-120
Intake valve timing control (Bank 1) ... EC-145, EC-795
Intake valve timing control (Bank 2) ... EC-145, EC-795
Intake valve timing control position sensor (Bank 1) ....
EC-1095
Intake valve timing control position sensor (Bank 2) ....
EC-1095
Intake valve timing control solenoid valve (Bank 1) ......
EC-408
, EC-1070
Intake valve timing control solenoid valve (Bank 2) ......
EC-408
, EC-1070
Integrated homelink transmitter ....................... BL-228
Intelligent cruise control (ICC) system .............. ACS-6
Interior ................................................................. EI-37
Interior lamp ...................................................... LT-157
IPDM (Intelligent power distribution module engine
room) ................................................................. PG-18
IVCB1 - Wiring diagram .... EC-409, EC-798, EC-1071
IVCB2 - Wiring diagram .... EC-411, EC-800, EC-1073
IVCSB1 - Wiring diagram ............................... EC-1096
IVCSB2 - Wiring diagram ............................... EC-1098
IVIS (Infiniti vehicle immobilizer system) precautions ...
GI-3
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Joint connector (J/C) .......................................... PG-76
K
Knock sensor (KS) ............................. EC-297
, EC-955
KS - Wiring diagram ........................... EC-298, EC-956
L
LAN system circuit ........................................... ATC-66
Laser beam aiming adjustment ....................... ACS-12
Latch (lower anchors and tether for children) system ...
SB-11
Line pressure solenoid valve ........................... AT-127
Line pressure test (A/T) ..................................... AT-52
Liquid gasket application ................................... LU-21
Liquid gasket application(VQ35DE) EM-6, LU-3, CO-3
Location of electrical units ................................. PG-70
Low coast brake solenoid valve ......... AT-168, AT-170
Low tire pressure warning system ...................... WT-7
Lubricant (R134a) A/C ........................ ATC-7, ATC-27
Lubrication circuit (engine)(VK45DE) ................ LU-23
Lubrication circuit (engine)(VQ35DE) .................. LU-5
Lubrication oil A/C .......................................... ATC-161

LAN-8
[CAN]
CAN COMMUNICATION
Revision: 2004 November 2004 FX35/FX45
Position light request signal R T R R
Low beam request signal T R
Low beam status signal RT
High beam request signal T R R
High beam status signal RT
Front fog light request signal T R
Day time running light request signal T R
Turn LED burnout status signal R T
Vehicle speed signalRT
RRRR T R
Sleep wake up signal T R R
Door switch signal R T R R R
Turn indicator signal T R
Key fob ID signal T R
Key fob door unlock signal T R
Oil pressure switch signalRT
TR
Buzzer output signal T R
Fuel level sensor signal R T
Fuel level low warning signal R T
ASCD SET lamp signal T R
ASCD CRUISE lamp signal T R
Malfunction indicator lamp signal T R
ASCD operation signal T R
ASCD OD cancel request signal T R
Front wiper request signal T R
Front wiper stop position signal R T
Rear window defogger switch signal T R
Rear window defogger control signal R R R T
Hood switch signal R T
Theft warning horn request signal T R
Horn chirp signal T R
Steering angle sensor signal T R
ABS warning lamp signalRT
VDC OFF indicator lamp signal R T
SLIP indicator lamp signalRT
Brake warning lamp signal R T
System setting signalTR R
RT T
A/T CHECK indicator lamp signal T RSignals ECM TCMDis-
play
unitBCMSteer-
ing
angle
sensorUnified
meter
and
A/C
amp.ABS
actua-
tor and
electric
unit
(con-
trol
unit)Driver
seat
control
unitIPDM
E/R

CAN COMMUNICATION
LAN-11
[CAN]
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LAN
Revision: 2004 November 2004 FX35/FX45
Turn LED burnout status
signalRT
Vehicle speed signalRRT
RRRR RR T R R
Sleep wake up signalTR R
TR
Door switch signal R R T R R R
Turn indicator signal T R
Key fob ID signal T R
Key fob door unlock sig-
nalTR
Oil pressure switch sig-
nalRT
TR
Buzzer output signalTR
TR
TR
Fuel level sensor signal R T
Fuel level low warning
signalRT
ASCD SET lamp signal T R
ASCD CRUISE lamp sig-
nalTR
Malfunctioning indicator
lamp signalTR
ICC operation signal R T
Front wiper request sig-
nalRT R
Front wiper stop position
signalRT
Rear window defogger
switch signalTR
Rear window defogger
control signalRR R T
Hood switch signal R T
Theft warning horn
request signalTR
Horn chirp signal T R
Steering angle sensor
signalTR
Tire pressure signal T R
Tire pressure data signal R T
ABS warning lamp signal R R TSignals ECM TCMDis-
play
con-
trol
unitLow
tire
pres-
sure
warn-
ing
con-
trol
unitICC
unitIntelli-
gent
Key
unitBCMSteer-
ing
angle
sen-
sorUni-
fied
meter
and
A/C
amp.ICC
sen-
sorABS
actu-
ator
and
elec-
tric
unit
(con-
trol
unit)Driver
seat
con-
trol
unitIPDM
E/R

CAN COMMUNICATION
LAN-15
[CAN]
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LAN
Revision: 2004 November 2004 FX35/FX45
Key fob door unlock signal T R
Oil pressure switch signalRT
TR
Buzzer output signal T R
Fuel level sensor signal R T
Fuel level low warning signal R T
ASCD SET lamp signal T R
ASCD CRUISE lamp signal T R
Malfunction indicator lamp signal T R
Front wiper request signal T R
Front wiper stop position signal R T
Rear window defogger switch signal T R
Rear window defogger control signal R R R T
Hood switch signal R T
Theft warning horn request signal T R
Horn chirp signal T R
Steering angle sensor signal T R
ABS warning lamp signalRT
VDC OFF indicator lamp signal R T
SLIP indicator lamp signalRT
Brake warning lamp signalRT
System setting signalTR R
RT T
AWD warning lamp signal T R
Distance to empty signal R T
Parking brake switch signal R R T
ASCD operation signal T R
ASCD OD cancel request signal T R
A/T CHECK indicator lamp signal T R
A/T position indicator lamp signal T R
A/T shift schedule change demand signal R T
Manual mode signal R T
Not manual mode signal R T
Manual mode shift up signal R T
Manual mode shift down signal R T
Manual mode indicator signal T R
Snow mode switch signal R T
Current gear position signal* R TSignals ECM TCMDis-
play
unitAW D
con-
trol
unitBCMSte er-
ing
angle
sensorUni-
fied
meter
and
A/C
amp.ABS
actua-
tor
and
elec-
tric
unit
(con-
trol
unit)Driver
seat
con-
trol
unitIPDM
E/R