Nissan Versa Sedan. Instruction — part 481

PERFORMANCE TEST

HA-23

< BASIC INSPECTION >

C

D

E

F

G

H

J

K

L

M

A

B

HA

N

O

P

PERFORMANCE TEST

Inspection

INFOID:0000000009269746

INSPECTION PROCEDURE

1. Connect recovery/recycling/recharging equipment (for HFC-134a) or manifold gauge.
2. Start the engine, and set to the following condition.

Test condition

3. Maintain test condition until A/C system becomes stable. (Approximately 10 minutes)
4. Check that test results of “recirculating-to-discharge air temperature” and “ambient air temperature-to-

operating pressure” are within the specified value.

5. When test results are within the specified value, inspection is complete.

If any test result is out of the specified value, perform diagnosis by gauge pressure. Refer to

HA-26,

"Symptom Table"

.

RECIRCULATING-TO-DISCHARGE AIR TEMPERATURE TABLE

AMBIENT AIR TEMPERATURE-TO-OPERATING PRESSURE TABLE

Surrounding condition

Indoors or in the shade (in a well-ventilated place)

Vehicle condition

Door

Closed

Door glass

Full open

Hood

Open

Engine speed

Idle speed

A/C condition

Temperature control switch or dial

Full cold

A/C switch

ON

Air outlet

VENT (ventilation)

Intake door position

Recirculation

Fan speed

Maximum speed set

Inside air (Recirculating air) at blower assembly inlet

Discharge air temperature from center ventilator

°C (°F)

Relative humidity

%

Air temperature

°C (°F)

50 – 60

20 (68)

4.7 – 6.7 (40 – 44)

25 (77)

8.6 – 11.1 (47 – 52)

30 (86)

12.6 – 15.6 (55 – 60)

35 (95)

19.0 – 22.5 (66 – 73)

60 – 70

20 (68)

6.7 – 8.7 (44 – 48)

25 (77)

11.1 – 13.6 (52 – 56)

30 (86)

15.6 – 18.6 (60 – 65)

35 (95)

22.5 – 26.0 (73 – 79)

HA-24

< BASIC INSPECTION >

PERFORMANCE TEST

Fresh air

High-pressure (Discharge side)

kPa (kg/cm

2

, psi)

Low-pressure (Suction side)

kPa (kg/cm

2

, psi)

Relative humidity

%

Air temperature

°C (°F)

50 – 70

25 (77)

909 – 1,112

(9.2 – 11.3, 131.8 – 161.2)

159 – 194

(1.6 – 2.0, 23.1 – 28.1)

30 (86)

1,073 -– 1,312

(10.9 – 13.4, 155.6 – 190.2)

211 – 259

(2.2 – 2.6, 30.6 – 37.6)

35 (95)

1,445 – 1,766

(14.7 – 18.0, 209.5 – 256.1)

247 – 300

(2.5 – 3.1, 35.8 – 43.5)

40 (104)

1,650 – 2,017

(16.8 – 20.6, 239.3 – 292.5)

290 – 355

(3.0 – 3.6, 42.1 – 51.5)

HEATER AND AIR CONDITIONING SYSTEM SYMPTOMS

HA-25

< SYMPTOM DIAGNOSIS >

C

D

E

F

G

H

J

K

L

M

A

B

HA

N

O

P

SYMPTOM DIAGNOSIS

HEATER AND AIR CONDITIONING SYSTEM SYMPTOMS

Symptom Table

INFOID:0000000009269747

SYMPTOM TABLE

Symptom

Reference Page

A/C system does not come on.

Go to Trouble Diagnosis Procedure for A/C System.

HAC-30

A/C system cannot be controlled.

Go to Self-diagnosis Function.

HA-15

Air outlet does not change.

Go to Adjustment Procedure for Mode Door.

HAC-52

Discharge air temperature does not change.

Go to Adjustment Procedure for Air Mix Door.

HAC-53

Intake door does not change.

Go to Adjustment Procedure for Intake Door.

HAC-51

Front blower motor operation is malfunction-
ing.

Go to Trouble Diagnosis Procedure for Front Blower Motor.

HAC-38

Magnet clutch does not engage.

Go to Trouble Diagnosis Procedure for Magnet Clutch.

HAC-42

Insufficient cooling.

Go to Trouble Diagnosis Procedure for Insufficient Cooling.

HAC-45

Insufficient heating.

Go to Trouble Diagnosis Procedure for Insufficient Heating.

HAC-46

Noise.

Go to Trouble Diagnosis Procedure for Noise.

HA-28

A/C switch LED does not illuminate.

Go to Trouble Diagnosis Procedure for A/C System.

HAC-37

Both high- and low-pressure sides are too
high.

Go to Trouble Diagnosis Procedure for Abnormal Pressure.

HA-26

High-pressure side is too high and low pres-
sure side is too low.

Go to Trouble Diagnosis Procedure for Abnormal Pressure.

HA-26

High-pressure side is too low and low-pres-
sure side is too high.

Go to Trouble Diagnosis Procedure for Abnormal Pressure.

HA-26

Both high- and low-pressure side sometimes
become negative.

Go to Trouble Diagnosis Procedure for Abnormal Pressure.

HA-26

Low-pressure side sometimes becomes neg-
ative.

Go to Trouble Diagnosis Procedure for Abnormal Pressure.

HA-26

Low-pressure side becomes negative.

Go to Trouble Diagnosis Procedure for Abnormal Pressure.

HA-26

HA-26

< SYMPTOM DIAGNOSIS >

REFRIGERATION SYSTEM SYMPTOMS

REFRIGERATION SYSTEM SYMPTOMS

Trouble Diagnosis For Unusual Pressure

INFOID:0000000009269748

Diagnose using a manifold gauge whenever system’s high and/or low side pressure(s) is/are unusual. The

marker above the gauge scale in the following tables indicates the standard (usual) pressure range. Refer to

Ambient air temperature-to-operating pressure table since the standard (usual) pressure, differs from vehicle

to vehicle.

Symptom Table

INFOID:0000000009269749

Gauge indication

Refrigerant cycle

Probable cause

Corrective action

Both high- and low-pressure sides
are too high.

The pressure returns to nor-
mal soon after sprinkling wa-
ter on condenser.

Overfilled refrigerant.

Collect all refrigerant, evacuate
refrigerant cycle again, and
then refill it with the specified
amount of refrigerant.

Air flow to condenser is insuf-
ficient.

Insufficient condenser cooling
performance.
• Poor fan rotation of radiator

and condenser.

• Improper installation of air

guide.

• Clogged or dirty condenser

fins.

• Repair or replace malfunc-

tioning parts.

• Clean and repair condenser

fins.

When compressor is stopped,
a high-pressure reading
quickly drops by approximate-
ly 196 kPa (2 kg/cm

2

, 28 psi).

It then gradually decreases.

Air mixed in refrigerant cycle.

Collect all refrigerant, evacuate
refrigerant cycle again, and
then refill it with the specified
amount of refrigerant.

• Low-pressure pipe is cooler

than the outlet of evapora-
tor.

• Low-pressure pipe is frost-

ed.

Expansion valve opened too
much (excessive flow of refrig-
erant).

Replace expansion valve.

High-pressure side is excessively
high and low-pressure side is too
low.

High-pressure pipe and upper
side of condenser become
hot, however, liquid tank does
not become as hot.

Clogged or crushed high-pres-
sure pipe located between
compressor and condenser.

Repair or replace the malfunc-
tioning parts.

High-pressure side is too low and
low-pressure side is too high.

• The readings of both sides

become equal soon after
compressor operation
stops.

• There is no temperature dif-

ference between high- and
low-pressure sides.

Malfunction in compressor sys-
tem (insufficient compressor
pressure operation).
• Damage or breakage of

valve.

• Malfunctioning gaskets.

Replace compressor.

AC359A

AC360A

AC356A