Nissan Cube. Instruction — part 297
EC-74
< SYSTEM DESCRIPTION >
[MR18DE]
COOLING FAN CONTROL
COOLING FAN CONTROL
System Diagram
INFOID:0000000009947215
System Description
INFOID:0000000009947216
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 via the 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].
JMBIA1324GB
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
ABS actuator and electric unit (control unit)
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-75
< SYSTEM DESCRIPTION >
[MR18DE]
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 via the 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
EC-76
< SYSTEM DESCRIPTION >
[MR18DE]
COOLING FAN CONTROL
Component Parts Location
INFOID:0000000009947217
1.
Ignition coil (with power transistor)
and spark plug
2.
Intake valve timing control solenoid
valve
3.
Fuel injector
4.
Refrigerant pressure sensor
5.
Knock sensor
6.
Camshaft position sensor (PHASE)
7.
Engine coolant temperature sensor
8.
Cooling fan motor
9.
Battery current sensor
10. IPDM E/R
11.
ECM
12. Mass air flow sensor (with intake air
temperature sensor)
13. Electric throttle control actuator
(with built in throttle position sensor
and throttle control motor)
14. EVAP canister purge volume control
solenoid valve
JMBIA2296ZZ
COOLING FAN CONTROL
EC-77
< SYSTEM DESCRIPTION >
[MR18DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
1.
ECM
2.
IPDM E/R
3.
Fuel pump fuse (15 A)
Vehicle front
1.
Electric throttle control actuator
(with built-in position sensor, throttle
control motor)
2.
Throttle valve
Vehicle front
1.
Battery current sensor
2.
Mass air flow sensor
(with Intake air temperature sensor)
Vehicle front
JMBIA2297ZZ
JMBIA2298ZZ
JMBIA2299ZZ
JMBIA2300ZZ
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