Nissan Versa Note. Manual - part 264

EC-38

< SYSTEM DESCRIPTION >

[HR16DE]

SYSTEM

CAN COMMUNICATION
CAN COMMUNICATION : System Description

INFOID:0000000009020615

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-29, "CAN COMMUNICATION SYSTEM : CAN Communication Signal Chart"

, about CAN com-

munication for detail.

COOLING FAN CONTROL
COOLING FAN CONTROL : System Diagram

INFOID:0000000009020616

COOLING FAN CONTROL : System Description

INFOID:0000000009020617

INPUT/OUTPUT SIGNAL CHART

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

*2: This signal is sent to ECM through CAN communication line.

SYSTEM DESCRIPTION (CVT MODELS)

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

sure, air conditioner ON signal. Then control system has 3-step control [HIGH/LOW/OFF].

JSBIA0321GB

Sensor

Input signal to ECM

ECM function

Actuator

Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)

Engine speed

*1

Piston position

Cooling fan speed request 
signal

IPDM E/R
↓
Cooling fan relay
↓
Cooling fan motor

Engine coolant temperature sensor

Engine coolant temperature

Refrigerant pressure sensor

Refrigerant pressure

Battery

Battery voltage

*1

Combination meter

Vehicle speed

*2

BCM

A/C ON signal

*2

Blower fan signal

*2

SYSTEM

EC-39

< SYSTEM DESCRIPTION >

[HR16DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Cooling Fan Operation

Cooling Fan Relay Operation

The ECM controls cooling fan relays through CAN communication line.

SYSTEM DESCRIPTION (M/T MODELS)

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

sure, air conditioner ON signal. Then control system has 2-step control [HIGH/OFF].

Cooling Fan Operation

Cooling Fan Relay Operation

The ECM controls cooling fan relays through CAN communication line.

PBIB2483E

Cooling fan speed

Cooling fan relay

1

2

3

Stop (OFF)

OFF

OFF

OFF

Low (LOW)

ON

OFF

OFF

High (HI)

ON

ON

ON

JSBIA1323GB

Cooling fan speed

Cooling fan relay

Stop (OFF)

OFF

Operate (HI)

ON

EC-40

< SYSTEM DESCRIPTION >

[HR16DE]

SYSTEM

EVAPORATIVE EMISSION SYSTEM
EVAPORATIVE EMISSION SYSTEM : System Diagram

INFOID:0000000009020618

EVAPORATIVE EMISSION SYSTEM : System Description

INFOID:0000000009020619

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.

JPBIA4896GB

Sensor

Input signal to ECM

ECM function

Actuator

Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)

Engine speed*

1

Piston position

EVAP canister purge 
flow control

EVAP canister purge volume 
control solenoid valve

Mass air flow sensor

Amount of intake air

Engine coolant temperature sensor

Engine coolant temperature

Air fuel ratio (A/F) sensor 1

Density of oxygen in exhaust gas
(Mixture ratio feedback signal)

Throttle position sensor

Throttle position

Accelerator pedal position sensor

Accelerator pedal position

Battery

Battery voltage*

1

Fuel tank temperature sensor

Fuel temperature in fuel tank

EVAP control system pressure sensor

Pressure in purge line

Combination meter

Vehicle speed*

2

SYSTEM

EC-41

< SYSTEM DESCRIPTION >

[HR16DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

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.

INTAKE VALVE TIMING CONTROL
INTAKE VALVE TIMING CONTROL : System Diagram

INFOID:0000000009020620

INTAKE VALVE TIMING CONTROL : System Description

INFOID:0000000009020621

INPUT/OUTPUT SIGNAL CHART

PBIB3639E

JPBIA4760GB

Sensor

Input signal to ECM

ECM function

Actuator

Crankshaft position sensor (POS)

Engine speed

*1

Piston position

Intake valve timing 
control

Intake valve timing control 
solenoid valve

Camshaft position sensor (PHASE)

Engine oil temperature sensor

Engine oil temperature

Engine coolant temperature sensor

Engine coolant temperature

Combination meter

Vehicle speed

*2