Nissan March K13. Instruction — part 388
HAC-86
< SYSTEM DESCRIPTION >
[MANUAL AIR CONDITIONER]
COMPONENT PARTS
SYSTEM DESCRIPTION
COMPONENT PARTS
MANUAL AIR CONDITIONING SYSTEM
MANUAL AIR CONDITIONING SYSTEM : Component Part Location
INFOID:0000000006024104
MANUAL AIR CONDITIONING SYSTEM : Component Description
INFOID:0000000006024105
A/C UNIT ASSEMBLY
1.
Magnet clutch
2.
Refrigerant pressure sensor
3.
A/C control
4.
Blower motor
5.
Blower fan resistor
6.
Thermo control amp.
A.
Located in the right side of A/C unit
assembly
B.
Located in the left side of A/C unit as-
sembly
C.
Located on evaporator
JMIIA0700ZZ
Component
Reference/Function
Magnet clutch
HAC-87, "COMPRESSOR : Magnet Clutch"
Refrigerant pressure sensor
XX-XX, "*****"
A/C control
Controls the air conditioner function.
Blower motor
HAC-87, "A/C UNIT ASSEMBLY : Blower Motor"
Blower fan resistor
HAC-87, "A/C UNIT ASSEMBLY : Blower Motor"
Thermo control amp.
COMPONENT PARTS
HAC-87
< SYSTEM DESCRIPTION >
[MANUAL AIR CONDITIONER]
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A/C UNIT ASSEMBLY : Blower Fan Resistor
INFOID:0000000006043969
• Compact and lightweight resistor is adopted with outstanding venti-
lation.
• Temperature fuse is installed to protects the blower motor circuit.
A/C UNIT ASSEMBLY : Blower Motor
INFOID:0000000006024119
• The blower motor (1) is installed in the RH side of A/C unit assem-
bly.
• The blower motor adopts the forcible air cooling system and one-
touch installation system without any screws.
A/C UNIT ASSEMBLY : Thermo Control Amp.
INFOID:0000000006024116
COMPONENT DESCRIPTION
• Thermo control amp. (1) is composed of thermistor and amplifier.
Thermistor is installed on evaporator, and amplifier is attached to
foot duct (left).
• When the thermistor detecting temperature which passing through
evaporator is extremely low, thermo control amp. sends the thermo
control amp. OFF signal to BCM, and stops the compressor.
OPERATING RATE CONTROL
• Thermo control amp. detects the positions of air temperature control dial and MODE dial.
• Thermo control amp. corrects the stopping temperature of A/C compressor depending on the condition of A/
C operation, and prevents too much heating by turning thermo control amp. ON
⇔
OFF.
COMPRESSOR
COMPRESSOR : Magnet Clutch
INFOID:0000000006024122
• The magnet clutch is the device that drives the compressor with the signal from IPDM E/R.
• Compressor is driven by the magnet clutch which is charged magnetic force by electrified.
• IPDM E/R controls magnet clutch by turning the built in A/C relay to ON
⇔
OFF according to ECM request.
: Vehicle front
JMIIA0704ZZ
: Vehicle front
JMIIA0703ZZ
JPIIA1750ZZ
HAC-88
< SYSTEM DESCRIPTION >
[MANUAL AIR CONDITIONER]
SYSTEM
SYSTEM
System Diagram
INFOID:0000000006024106
System Description
INFOID:0000000006043972
• Instruction air conditioner system is controlled by each function of BCM, ECM or IPDM E/R.
Control by BCM
- Compressor control
Control by ECM
- Compressor control
- Cooling fan control. Refer to
XX-XX, "*****"
.
- Air conditioner cut control. Refer to
XX-XX, "*****"
.
Control by IPDM E/R
- Relay control. Refer to
XX-XX, "*****"
.
- Cooling fan control. Refer to
XX-XX, "*****"
.
• Fan speed of blower fan motor is changed by the combination of fan switch operation and blower fan resistor
control.
Compressor Control
INFOID:0000000006043973
DESCRIPTION
• BCM transmits the A/C ON signal and blower fan ON signal to ECM via CAN communication line only when
the compressor operational condition is satisfied, and A/C indicator is turned ON.
NOTE:
Compressor operational condition
• Thermo control amp. signal ON
• Blower fan signal ON
• A/C switch signal ON
• ECM judges the conditions of each sensor (Refrigerant pressure sensor signal, accelerator position signal,
etc.), and transmits the A/C compressor request signal to IPDM E/R via CAN communication line.
• By receiving the A/C compressor request signal from ECM, IPDM E/R turns the A/C relay to ON, and acti-
vates the compressor.
JMIIA0701GB
SYSTEM
HAC-89
< SYSTEM DESCRIPTION >
[MANUAL AIR CONDITIONER]
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COMPRESSOR PROTECTION CONTROL AT PRESSURE MALFUNCTION
The high-pressure side value that is detected by refrigerant pressure sensor is as per the following state, ECM
requests IPDM E/R to turn A/C relay OFF and stop the compressor.
• 3.12 MPa (31.8 kg/cm
2
, 452 psi) or more (When the engine speed is less than 1,500 rpm)
• 2.74 MPa (27.9 kg/cm
2
, 397 psi) or more (When the engine speed is 1,500 rpm or more)
• 0.14 MPa (1.4 kg/cm
2
, 20 psi) or less
LOW TEMPERATURE PROTECTION CONTROL
• When the thermo control amp. detects that evaporator surface
temperature is 2
°
C (36
°
F) or less, thermo control amp. signal
becomes OFF, and stops the compressor.
• When the air temperature returns to 3.5
°
C (38
°
F) or more, the
compressor is activated.
OPERATING RATE CONTROL
• Thermo control amp. detects the positions of air temperature control dial and MODE dial.
• Thermo control amp. corrects the stopping temperature of A/C compressor depending on the condition of A/
C operation, and prevents too much heating by turning thermo control amp. ON
⇔
OFF.
AIR CONDITIONER CUT CONTROL
When the engine condition is high load, ECM makes the A/C relay to OFF, and stops the compressor. Refer to
XX-XX, "*****"
.
Door Control
INFOID:0000000006024107
SWITCHES AND THEIR CONTROL FUNCTIONS
SJIA0802E
JMIIA0689ZZ
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