Nissan Quest E52. Instruction — part 461
EC-54
< SYSTEM DESCRIPTION >
[VQ35DE]
SYSTEM
CAN COMMUNICATION
CAN COMMUNICATION : System Description
INFOID:0000000009650967
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-
tronic 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.
Refer to
LAN-32, "CAN COMMUNICATION SYSTEM : CAN Communication Signal Chart"
munication for detail.
STARTER MOTOR DRIVE CONTROL
1.
Power valve actuator 1
2.
VIAS control solenoid valve 1
3.
VIAS control solenoid valve 2
4.
Power valve actuator 2
5.
Intake manifold collector
JMBIA0172ZZ
SYSTEM
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< SYSTEM DESCRIPTION >
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STARTER MOTOR DRIVE CONTROL : System Diagram
INFOID:0000000009650970
STARTER MOTOR DRIVE CONTROL : System Description
INFOID:0000000009650971
INPUT/OUTPUT SIGNAL CHART
*1: ECM determines the start signal status by the signals of engine speed and battery voltage.
*2: This signal is sent to the ECM through CAN communication line.
SYSTEM DESCRIPTION
When rapid deceleration occurs during engine runs or idle speed decreases due to heavy load conditions,
ECM detects a decrease in idle speed and restarts the engine to secure reliability in handleability by transmit-
ting a cranking request signal to IPDM E/R for activating the starter motor under the following conditions:
• Selector lever: P or any position other than N
• Idle switch: ON (Accelerator pedal not depressed)
• Stop lamp switch: ON (Brake pedal depressed)
Models with no Intelligent Key System transmit a control signal directly to IPDM E/R. On the other hand, mod-
els with the Intelligent Key System transmit a control signal to IPDM E/R by way of BCM via CAN communica-
tion.
IPDM E/R detects an operating state of the starter motor relay and the starter motor control relay and trans-
mits a feed back signal to ECM via CAN Communication.
JPBIA4762GB
Sensor
Input signal to ECM
ECM function
Actuator
Crankshaft position sensor (POS)
Engine speed
*1
Piston position
Starter motor drive control
• BCM
• IPDM E/R
(Starter relay & starter control relay)
Camshaft position sensor (PHASE)
Engine coolant temperature sensor
Engine coolant temperature
Accelerator pedal position sensor
Accelerator pedal position
Transmission range switch
Gear position
Stop lamp switch
Brake pedal position
Combination meter
Vehicle speed signal
*2
EC-56
< SYSTEM DESCRIPTION >
[VQ35DE]
OPERATION
OPERATION
AUTOMATIC SPEED CONTROL DEVICE (ASCD)
AUTOMATIC SPEED CONTROL DEVICE (ASCD) : Switch Name and Function
INFOID:0000000009650972
SWITCHES AND INDICATORS
SET SPEED RANGE
ASCD system can be set the following vehicle speed.
SWITCH OPERATION
CANCEL CONDITION
• When any of following conditions exist, the cruise operation is canceled.
- CANCEL switch is pressed
- ASCD MAIN switch pressed (Set speed is cleared)
- More than two switches at ASCD steering switch are pressed at the same time (Set speed is cleared)
- Brake pedal is depressed
- Selector lever position is changed to N, P or R
- Vehicle speed decreased to 13 km/h (8 MPH) lower than the set speed
- TCS system is operated
• When the ECM detects any of the following conditions, the ECM cancels the cruise operation and informs
the driver by blinking CRUISE indicator lamp.
- Engine coolant temperature is slightly higher than the normal operating temperature. Then CRUISE indica-
tor lamp is blinked slowly.
NOTE:
Engine coolant temperature decreases to the normal operating temperature, CRUISE indicator lamp stop
blinking and the cruise operation is able to work.
- Malfunction for some self-diagnoses regarding ASCD system. SET indicator lamp is blinked quickly.
1.
CRUISE indicator
2.
CANCEL switch
3.
ASCD MAIN switch
4.
SET / - switch
(SET/COAST)
5.
RES / + switch
(RESUME/ACCELERATE)
A.
On the combination meter
B.
On the steering wheel
JSBIA1368ZZ
Minimum speed (Approx.)
Maximum speed (Approx.)
40 km/h (25 MPH)
144 km/h (89 MPH)
Item
Function
CANCEL switch
Cancels the cruise control driving.
RES / + switch
(RESUME/ACCELERATE)
• Resumes the set speed.
• Increases speed incrementally during cruise control driving.
SET /
−
switch
(SET/COAST)
• Sets desired cruise speed.
• Decreases speed incrementally during cruise control driving.
ASCD MAIN switch
Master switch to activate the ASCD system.
OPERATION
EC-57
< SYSTEM DESCRIPTION >
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• When ASCD MAIN switch is turned to OFF during the cruise control driving, all of ASCD operations is can-
celed and vehicle speed memory is erased.
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