Nissan Pathfinder. Manual - part 433

EC-38

< SYSTEM DESCRIPTION >

[VQ35DE]

SYSTEM

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 cancel operation other than pressing MAIN switch

is performed, 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 is in the P and N positions

• Vehicle speed is greater than 40 km/h (25 MPH) and less than 144 km/h (89 MPH)

COOLING FAN CONTROL
COOLING FAN CONTROL : System Description

INFOID:0000000009178041

SYSTEM DIAGRAM

*: ECM determines the start signal status by the signals of engine speed and battery voltage.

SYSTEM DESCRIPTION

ECM controls cooling fan speed corresponding to engine speed, engine coolant temperature, refrigerant pres-

sure, battery voltage, vehicle speed, A/C ON signal, A/C evaporator temperature, target A/C evaporator tem-

perature and blower fan ON signal.

Cooling fan speed request signal is sent to IPDM E/R from ECM via the CAN communication line. Then, IPDM

E/R sends ON/OFF pulse duty signal to cooling fan control module. Corresponding to this ON/OFF pulse duty

signal, cooling fan control module gives cooling fan motor operating voltage to cooling fan motors. Cooling fan

speed is controlled by duty cycle of cooling fan motor operating voltage sent from cooling fan control module.

ELECTRONIC CONTROLLED ENGINE MOUNT
ELECTRONIC CONTROLLED ENGINE MOUNT : System Description

INFOID:0000000009178042

SYSTEM DIAGRAM

SYSTEM DESCRIPTION

JSBIA3065GB

JMBIA1827GB

SYSTEM

EC-39

< SYSTEM DESCRIPTION >

[VQ35DE]

C

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N

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The ECM controls the engine mount operation corresponding to the engine speed. The control system has a

2-step control [Soft/Hard]

ELECTRONIC CONTROLLED ENGINE MOUNT LINE DRAWING

Vehicle condition

Engine mount control

Engine speed: Below 950 rpm

Soft

Engine speed: Above 950 rpm

Hard

Electronic controlled engine mount 
control solenoid valve

Intake manifold collector

: From next figure

JMBIA2161ZZ

EC-40

< SYSTEM DESCRIPTION >

[VQ35DE]

SYSTEM

NOTE:

Do not use soapy water or any type of solvent while installing vacuum hose.

EVAPORATIVE EMISSION SYSTEM

Front electronic controlled engine mount

Rear electronic controlled engine mount

: To previous figure

JMBIA2072ZZ

SYSTEM

EC-41

< SYSTEM DESCRIPTION >

[VQ35DE]

C

D

E

F

G

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N

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EVAPORATIVE EMISSION SYSTEM : System Description

INFOID:0000000009178043

SYSTEM DIAGRAM

SYSTEM DESCRIPTION

The evaporative emission system is used to reduce hydrocarbons emitted into the atmosphere from the fuel

system. This reduction of hydrocarbons is accomplished by activated charcoals in the EVAP canister.

The fuel vapor in the sealed fuel tank is led into the EVAP canister which contains activated carbon and the

vapor is stored there when the engine is not operating or when refueling to the fuel tank.

The vapor in the EVAP canister is purged by the air through the purge line to the intake manifold when the

engine is operating. EVAP canister purge volume control solenoid valve is controlled by ECM. When the

engine operates, the flow rate of vapor controlled by EVAP canister purge volume control solenoid valve is

proportionally regulated as the air flow increases.

EVAP canister purge volume control solenoid valve also shuts off the vapor purge line during decelerating and

idling.

THROTTLE CONTROL

JSBIA0371GB

PBIB1631E