Nissan Frontier D40. Manual - part 726

MANUAL A/C IDENTIFICATION TABLE

HAC-7

< FUNCTION DIAGNOSIS >

[MANUAL A/C (TYPE 1)]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

FUNCTION DIAGNOSIS

MANUAL A/C IDENTIFICATION TABLE

Application Table

INFOID:0000000005275862

Manual A/C Type

Description

Visual Identification

Manual A/C (Type 1)

Two Control Dial System 

[with variable blower control 

(VBC)]

Manual A/C (Type 2)

Three Control Dial System 

[without variable blower con-

trol (VBC)]

AWIIA0481ZZ

AWIIA1228ZZ

HAC-8

< FUNCTION DIAGNOSIS >

[MANUAL A/C (TYPE 1)]

FUNCTION INFORMATION

FUNCTION INFORMATION

Component Part Location

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ENGINE COMPARTMENT

WJIA1489E

FUNCTION INFORMATION

HAC-9

< FUNCTION DIAGNOSIS >

[MANUAL A/C (TYPE 1)]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

PASSENGER COMPARTMENT

⇒

:Front

1.

Front air control M50

2.

Intake sensor M146

3.

Intake door motor M58

4.

Variable blower control M121

5.

Mode door motor M142

6.

Air mix door motor M148

AWIIA1198ZZ

HAC-10

< FUNCTION DIAGNOSIS >

[MANUAL A/C (TYPE 1)]

REFRIGERATION SYSTEM

REFRIGERATION SYSTEM

Refrigerant Cycle

INFOID:0000000005548858

REFRIGERANT FLOW

The refrigerant flows in the standard pattern. Refrigerant flows through the compressor, condenser, liquid tank,
expansion valve, evaporator, and back to the compressor. The refrigerant evaporation through the evaporator
coil is controlled by an externally equalized expansion valve, located inside the evaporator case.

FREEZE PROTECTION

The compressor cycles on and off to maintain the evaporator temperature within a specified range. When the
evaporator coil temperature falls below a specified point, the intake sensor interrupts the compressor opera-
tion. When the evaporator coil temperature rises above the specification, the intake sensor allows compressor
operation.

Refrigerant System Protection

INFOID:0000000005548859

REFRIGERANT PRESSURE SENSOR

The refrigerant system is protected against excessively high- or low-pressures by the refrigerant pressure sen-
sor, located on the condenser. If the system pressure rises above or falls below the specifications, the refriger-
ant pressure sensor detects the pressure inside the refrigerant line and sends a voltage signal to the ECM.
The ECM de-energizes the A/C relay to disengage the magnetic compressor clutch when pressure on the high
pressure side detected by refrigerant pressure sensor is over about 2,746 kPa (28 kg/cm

2

, 398 psi), or below

about 120 kPa (1.22 kg/cm

2

, 17.4 psi).

PRESSURE RELIEF VALVE

The refrigerant system is also protected by a pressure relief valve, located in the rear head of the compressor.
When the pressure of refrigerant in the system increases to an abnormal level [more than 2,990 kPa (30.5 kg/
cm

2

, 433.6 psi)], the release port on the pressure relief valve automatically opens and releases refrigerant into

the atmosphere.

WJIA1482E