Nissan Maxima Service and Repair Manual: Automatic speed control device (ASCD)
System Diagram
System Description
INPUT/OUTPUT SIGNAL CHART
*: This signal is sent to the ECM via the 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 lamp in combination meter. If
any malfunction occurs in the
ASCD system, it automatically deactivates control.
NOTE:
Always drive vehicle in a safe manner according to traffic conditions and obey
all traffic laws.
SET OPERATION
Press MAIN switch. (The CRUISE lamp 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 SET/COAST switch.
ACCELERATE OPERATION
If the RESUME/ACCELERATE 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 maintain 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 on ASCD steering switch are pressed at the
same time (Set speed will be cleared)
- Brake pedal is depressed
- Selector lever position is N, P or R
- Vehicle speed decreased to 13 km/h (8 MPH) lower than the set
speed
- TCS system is operated
- CVT control system has a malfunction. Refer to EC-437,
"Description".
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
SET/COAST switch or RESUME/
ACCELERATE switch.If MAIN switch is turned to OFF while ASCD is activated, all
of ASCD operations will be canceled and vehicle
speed memory will be erased.
COAST OPERATION
When the SET/COAST switch is pressed during cruise control driving, decrease
vehicle set speed until the
switch is released. And then ASCD will maintain the new set speed.
RESUME OPERATION
When the RESUME/ACCELERATE switch is pressed after canceling operation other
than pressing the MAIN
switch, vehicle speed will return to last set speed. To resume vehicle set
speed, vehicle condition must meet
following conditions.
- Brake pedal is released
- Selector lever position is other than P and N
- Vehicle speed is greater than 40 km/h (25 MPH) and less than 144
km/h (89 MPH)
Component Parts Location
- Intake valve timing control solenoid
valve (bank 1)
- Electronic controlled engine mount
control solenoid valve
- Exhaust valve timing control magnet
retarder (bank 2)
- Intake valve timing control solenoid
valve (bank 2)
- Knock sensor (bank 1 and 2)
- Fuel injector (bank 2)
- Ignition coil (with power transistor) and
spark plug (bank 2)
- Exhaust valve timing control position
sensor (bank 2)
- Crankshaft position sensor (POS)
- Engine coolant temperature sensor
- Camshaft position sensor (PHASE)
(bank 2)
- Transmission range switch
- Refrigerant pressure sensor
- ECM
- Battery current sensor
- Condenser-2
- EVAP canister purge volume control
solenoid valve
- Mass air flow sensor (with intake air
temperature sensor)
- Camshaft position sensor (PHASE)
(bank 1)
- EVAP service port
- Power valve actuator 2
- Electric throttle control actuator
- Exhaust valve timing control position
sensor (bank 1)
- Ignition coil (with power transistor) and
spark plug (bank 1)
- Fuel injector (bank 1)
- VIAS control solenoid valve 1 and 2
- Power valve actuator 1
- Exhaust valve timing control magnet
retarder (bank 1)
- Power steering pressure sensor
- Mas air flow sensor (with intake air
temperature sensor)
- Air cleaner case
- Engine coolant temperature sensor
(view with engine cover removed)
- EVAP canister purge volume control
solenoid valve (view with engine cover
removed)
- Power valve actuator 1 (view with engine
cover removed)
- VIAS control solenoid valve 1
- VIAS control solenoid valve 2
- Power valve actuator 2
- Power steering pressure sensor
- Tie rod (RH)
- Camshaft position sensor (PHASE)
(bank 1) (view with air cleaner case removed)
- Exhaust valve timing control position
sensor (bank 1)
- Camshaft position sensor (PHASE)
(bank 2) (view with air cleaner case removed)
- Exhaust valve timing control position
sensor (bank 2)
- . Engine oil temperature sensor
: Vehicle front
- A/F sensor 1 (bank 1) (view with engine
removed)
- A/F sensor 1 (bank 2)
- HO2S2 (bank 1) harness connector
(view with engine removed)
- HO2S2 (bank 2) harness connector
- Front engine mount
- Crankshaft position sensor (POS)
: Vehicle front
- Electronic controlled engine mount
control solenoid valve (view with engine
cover removed)
- EVAP control system pressure sensor
(view with rear suspension member removed)
- EVAP canister vent control valve
- EVAP canister
- Fuel injector harness connector (view
with intake manifold collector removed)
- Exhaust valve timing control magnet
retarder (bank 1) (view with engine removed)
- Intake valve timing control solenoid
valve (bank 1)
- Intake valve timing control solenoid
valve (bank 2)
- Exhaust valve timing control magnet
retarder (bank 2)
: Vehicle front
- Knock sensor (bank 2) (view with intake
manifold removed)
- Knock sensor (bank 1)
- Transmission range switch
(view with CVT removed)
- Battery
- IPDM E/R
- ECM
- Refrigerant pressure sensor (view
with front grille removed)
- Accelerator pedal position sensor
: Vehicle front
- Stop lamp switch
- ASCD brake switch
- ASCD steering switch
Component Description
Component Reference
- ASCD steering switch EC-426, "Description"
- ASCD brake switch EC-429, "Description"
- ASCD clutch switch EC-429, "Description"
- Stop lamp switch EC-448, "Description"
- Electric throttle control actuator EC-465, "Description"
- ASCD indicator
System Diagram
System Description
INPUT/OUTPUT SIGNAL CHART
*1: This signal is sent to the ECM via the CAN communication line.
*2: ECM determines the start signal status by the signals of ...
System Description
CAN (Controller Area Network) is a serial communication line for real time
application. It is an on-vehicle multiplex
communication line with high data communication speed and ...
Other materials:
BCM (Body control module))
REMOVAL AND INSTALLATION
Removal and Installation
REMOVAL
CAUTION:
Before replacing BCM, perform "READ CONFIGURATION" to save or print current
vehicle specification.
Refer to BCS-5, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT (BCM) : Work
Procedure ".
Remo ...
Using the panic alarm
If you are near your vehicle and feel threatened,
you may activate the panic alarm to call attention
by pressing and holding the button
on the
Intelligent Key for longer than 1 second.
The panic alarm and headlights will stay on for a
period of time.
The panic alarm stops when:
It ...
Basic inspection
DIAGNOSIS AND REPAIR WORK FLOW
WITH COLOR DISPLAY
WITH COLOR DISPLAY : How to Perform Trouble Diagnosis For Quick And
Accurate Repair
WORK FLOW
1.LISTEN TO CUSTOMER COMPLAINT
Interview the customer to obtain as much information as possible about the
conditions and environment under which th ...