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
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
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
H
I
J
K
L
M
A
EC
N
P
O
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
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