Nissan Juke F15. Instruction — part 458
SYSTEM
EC-645
< SYSTEM DESCRIPTION >
[MR EXCEPT FOR NISMO RS MODELS]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
AIR CONDITIONING CUT CONTROL : System Diagram
INFOID:0000000012198218
AIR CONDITIONING CUT CONTROL : System Description
INFOID:0000000012198219
INPUT/OUTPUT SIGNAL CHART
*: ECM determines the start signal status by the signals of engine speed and battery voltage.
SYSTEM DESCRIPTION
This system improves engine operation when the air conditioner is used.
Under the following conditions, the air conditioner is turned off.
• When the accelerator pedal is fully depressed.
• When cranking the engine.
• At high engine speeds.
• When the engine coolant temperature becomes excessively high.
• When operating power steering during low engine speed or low vehicle speed.
• When engine speed is excessively low.
• When refrigerant pressure is excessively low or high.
JSBIA0320GB
Sensor
Input Signal to ECM
ECM function
Actuator
Crankshaft position sensor (POS)
Engine speed
*
Air conditioner
cut control
IPDM E/R
↓
Air conditioner relay
↓
Compressor
Camshaft position sensor (PHASE)
Engine coolant temperature sensor
Engine coolant temperature
Accelerator pedal position sensor
Accelerator pedal position
Battery
Battery voltage
*
Refrigerant pressure sensor
Refrigerant pressure
EPS control unit
CAN commu-
nication
EPS operation signal
Combination meter
CAN commu-
nication
Vehicle speed signal
BCM
CAN commu-
nication
• A/C ON signal
• Blower fan ON signal
EC-646
< SYSTEM DESCRIPTION >
[MR EXCEPT FOR NISMO RS MODELS]
SYSTEM
COOLING FAN CONTROL
COOLING FAN CONTROL : System Diagram
INFOID:0000000012198220
COOLING FAN CONTROL : System Description
INFOID:0000000012198221
INPUT/OUTPUT SIGNAL CHART
*: The ECM determines the start signal status by the signals of engine speed and battery voltage.
SYSTEM DESCRIPTION
ECM controls cooling fan speed corresponding to vehicle speed, engine coolant temperature, A/C ON signal
and refrigerant pressure.
Cooling fan control signal is sent to IPDM E/R from ECM by 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.
JPBIA4759GB
Sensor
Input signal to ECM
ECM function
Actuator
Crankshaft position sensor (POS)
Engine speed
*
Cooling fan
control
IPDM E/R
↓
Cooling fan control mod-
ule
↓
Cooling fan motor
Camshaft position sensor (PHASE)
Engine coolant temperature sensor
Engine coolant temperature
Refrigerant pressure sensor
Refrigerant pressure
Battery
Battery voltage
*
Combination meter
CAN commu-
nication
Vehicle speed signal
BCM
CAN commu-
nication
A/C ON signal
A/C evaporator temper-
ature*
Target A/C evaporator
temperature*
Blower fan ON signal*
SYSTEM
EC-647
< SYSTEM DESCRIPTION >
[MR EXCEPT FOR NISMO RS MODELS]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
THERMAL MANAGEMENT CONTROL
THERMAL MANAGEMENT CONTROL : System Description
INFOID:0000000012198222
SYSTEM DIAGRAM
*1: For CVT models
SYSTEM DESCRIPTION
The multi-way control valve changes the paths to heater & EGR cooler, oil cooler, and radiator according to
engine coolant temperature and driving conditions.
When coolant temperature is low, the paths to heater & EGR cooler, oil cooler, and radiator are closed and
coolant is circulated only inside the engine to accelerate engine warm-up.
When coolant temperature is high, the paths to heater & EGR cooler, oil cooler, and radiator are opened and
coolant is refrigerated. This raises the coolant temperature and oil temperature rapidly and improves the fuel
economy by reducing friction among parts.
Operation
When the ignition switch is OFF, the valve is fully closed to accelerate bleeding the coolant channels.
JSBIA5422GB
EC-648
< SYSTEM DESCRIPTION >
[MR EXCEPT FOR NISMO RS MODELS]
SYSTEM
When receiving a blower fan ON signal and/or an A/C ON signal, ECM opens the flow path to the heater &
EGR cooler even when coolant temperature is low.
A: Closes all flow paths , , and and circulates coolant only inside the engine.
B: Opens the flow path to Heater & EGR cooler and circulates coolant to Heater & EGR cooler.
C: Opens the flow path to oil cooler and circulates coolant to Heater & EGR cooler and oil cooler.
D: Opens the flow path to radiator and circulates coolant to Heater & EGR cooler, oil cooler, and radiator.
E: Opens all the flow paths , , and .
The high coolant temperature control is performed by opening/closing the flow path to the radiator to raise the
engine oil temperature even when the coolant temperature is high. When engine load is high, the high coolant
temperature control is not performed because of the knocking control.
When detecting a malfunction in multi-way control valve, ECM fully opens the valve to secure cooling paths.
STARTER MOTOR DRIVE CONTROL
Valve position
Heater & EGR
cooler
Oil cooler
Radiator
A
Full close
Full close
Full close
B
Open
Full close
Full close
C
Full open
Open
Full close
D
Full open
Full open
Open
E
Full open
Full open
Full open
JSBIA5657GB
JSBIA5434GB
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