Nissan Tiida C11. Manual - part 355

EC-70

< FUNCTION DIAGNOSIS >

[HR16DE (WITH EURO-OBD)]

COOLING FAN CONTROL

COOLING FAN CONTROL

System Diagram

INFOID:0000000001161159

System Description

INFOID:0000000001161160

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

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].

Cooling Fan Operation

JMBIA0177GB

Sensor

Input signal to ECM

ECM function

Actuator

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

Engine speed*

1

Cooling fan 
control

IPDM E/R

↓

Cooling fan relay

↓

Cooling fan motor

Battery

Battery voltage*

1

Combination meter

Vehicle speed*

2

Engine coolant temperature sensor

Engine coolant temperature

BCM

Air conditioner ON signal*

2

Refrigerant pressure sensor

Refrigerant pressure

COOLING FAN CONTROL

EC-71

< FUNCTION DIAGNOSIS >

[HR16DE (WITH EURO-OBD)]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Models with A/C

Models without A/C

Cooling Fan Relay Operation

The ECM controls cooling fan relays through CAN communication line.

MBIB1451E

JMBIA0821GB

Cooling fan speed

Cooling fan relay

1

2

3

Stop (OFF)

OFF

OFF

OFF

Low (LOW)

ON

OFF

OFF

High (HI)

OFF

ON

ON

EC-72

< FUNCTION DIAGNOSIS >

[HR16DE (WITH EURO-OBD)]

COOLING FAN CONTROL

Component Parts Location

INFOID:0000000001677956

1.

Ignition coil (with power transistor) 
and spark plug

2.

Intake valve timing control solenoid 
valve

3.

Refrigerant pressure sensor

4.

Knock sensor

5.

Fuel injector

6.

Cooling fan motor

7.

Camshaft position sensor (PHASE)

8.

IPDM E/R

9.

ECM

10. Mass air flow sensor (with intake air 

temperature sensor)

11.

Engine coolant temperature sensor

12. Electric throttle control actuator

(with built in throttle position sensor 
and throttle control motor)

13. EVAP canister purge volume control 

solenoid valve

PBIB2939E

COOLING FAN CONTROL

EC-73

< FUNCTION DIAGNOSIS >

[HR16DE (WITH EURO-OBD)]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

1.

Mass air flow sensor
(with intake air temperature sensor)

2.

Engine coolant temperature sensor

3.

Electric throttle control actuator

4.

Camshaft position sensor (PHASE)

5.

Ignition coil (with power transistor)

6.

Fuel injector

7.

EVAP canister purge volume control 
solenoid valve

Vehicle front

PBIB2940E