Nissan Pathfinder. Manual — part 435

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SYSTEM

INTEGRATED CONTROL OF ENGINE, CVT, AND ABS
INTEGRATED CONTROL OF ENGINE, CVT, AND ABS : System Description

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Real time communications (signal exchange) among control units (e.g. ECM, CVT, ABS, and combination

meter) via CAN communication optimizes engine torque and lock-up during gear shift and prevents engine

speed from decreasing during deceleration.

CAN COMMUNICATION
CAN COMMUNICATION : System Description

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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

Power valve actuator 1

VIAS control solenoid valve 1

VIAS control solenoid valve 2

Power valve actuator 2

Intake manifold collector

JMBIA0172ZZ

SYSTEM

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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-36, "CAN COMMUNICATION SYSTEM : CAN Communication Signal Chart"

, about CAN com-

munication for detail.

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OPERATION

OPERATION

AUTOMATIC SPEED CONTROL DEVICE (ASCD)
AUTOMATIC SPEED CONTROL DEVICE (ASCD) : Switch Name and Function

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SWITCHES AND INDICATORS

SET SPEED RANGE

ASCD system can be set the following vehicle speed.

SWITCH OPERATION

CANCEL OPERATION

When any of following conditions exist, cruise operation will be canceled.

• CANCEL switch is pressed

• ON/OFF (MAIN) switch pressed (Set speed is cleared)

• 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 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 will cancel the cruise operation and inform

the driver by blinking indicator.

• Engine coolant temperature is slightly higher than the normal operating temperature, CRUISE indicator may

blink slowly.

When the engine coolant temperature decreases to the normal operating temperature, CRUISE indicator will

stop blinking and the cruise operation will be able to work by pressing COAST/SET switch or ACCEL/RES

switch.

• Malfunction for some self-diagnoses regarding ASCD control: SET indicator will blink quickly.

1.

CRUISE indicator

2.

SET indicator 3.

CANCEL

switch

4.

ON/OFF (MAIN) switch

5.

COAST/SET switch

6.

ACCEL/RES switch
(ACCELERATE/RESUME)

A.

On the combination meter (Informa-
tion display)

B.

On the steering wheel

JSBIA0376ZZ

Minimum speed (Approx.)

Maximum speed (Approx.)

38 km/h (24 MPH)

144 km/h (89 MPH)

Item

Function

CANCEL switch

Cancels the cruise control driving.

ACCEL/RES switch
(RESUME/ACCELERATE)

• Resumes the set speed.
• Increases speed incrementally during cruise control driving.

COAST/SET switch
(SET/COAST)

• Sets desired cruise speed.
• Decreases speed incrementally during cruise control driving.

ON/OFF (MAIN) switch

Master switch to activate the ASCD system.

OPERATION

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If MAIN switch is turned to OFF during ASCD is activated, all of ASCD operations will be canceled and vehicle

speed memory will be erased.