Nissan Tiida C11. Instruction — part 882

HAC-192

< SYMPTOM DIAGNOSIS >

[AUTO AIR CONDITIONER (W/O NAVI)]

INSUFFICIENT COOLING

Low-pressure Side Becomes Negative

Gauge indication

Refrigerant cycle

Probable cause

Corrective action

Low-pressure side sometimes be-
comes negative.

• Air conditioning system does

not function and does not cy-
clically cool the compart-
ment air.

• The system constantly func-

tions for a certain period of
time after compressor is
stopped and restarted.

Refrigerant does not discharge
cyclically.

↓

Moisture is frozen at expan-
sion valve outlet and inlet.

↓

Water is mixed with refrigerant.

• Drain water from refrigerant

or replace refrigerant.

• Replace liquid tank.

AC354A

Gauge indication

Refrigerant cycle

Probable cause

Corrective action

Low-pressure side becomes nega-
tive.

Liquid tank or front/rear side of
expansion valve’s pipe is frost-
ed or dewed.

High-pressure side is closed
and refrigerant does not flow.

↓

Expansion valve or liquid tank
is frosted.

Leave the system at rest until
no frost is present. Start it
again to check whether or not
the malfunction is caused by
water or foreign particles.
• If water is the cause, initially

cooling is okay. Then the wa-
ter freezes causing a block-
age. Drain water from
refrigerant or replace refrig-
erant.

• If due to foreign particles, re-

move expansion valve and
remove the particles with dry
and compressed air (not
shop air).

• If either of the above meth-

ods cannot correct the mal-
function, replace expansion
valve.

• Replace liquid tank.
• Check oil for contamination.

AC362A

INSUFFICIENT HEATING

HAC-193

< SYMPTOM DIAGNOSIS >

[AUTO AIR CONDITIONER (W/O NAVI)]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

INSUFFICIENT HEATING

Component Function Check

INFOID:0000000001547457

SYMPTOM: Insufficient heating

INSPECTION FLOW

1.

CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - TEMPERATURE INCREASE

1.

Press the AUTO switch.

2.

Turn the temperature control dial (driver) clockwise until 32

°

C (90

°

F) is displayed.

3.

Check for hot air at discharge air outlets.

Can this symptom be duplicated?

YES

>> GO TO 2.

NO

>> Perform complete system operational check. Refer to

HAC-87, "Operational Check"

.

2.

CHECK FOR SERVICE BULLETINS

Check for any service bulletins.

>> GO TO 3.

3.

PERFORM SELF-DIAGNOSIS

Perform self-diagnosis. Refer to

HAC-98, "Front Air Control Self-Diagnosis"

.

Is the inspection results normal?

YES

>> GO TO 4.

NO

>> Refer to

HAC-197, "Self-Diagnosis"

.

4.

CHECK ENGINE COOLING SYSTEM

1.

Check for proper engine coolant level. Refer to

XX-XX, "*****"

.

2.

Check hoses for leaks or kinks.

3.

Check radiator cap. Refer to

XX-XX, "*****"

.

4.

Check for air in cooling system.

>> GO TO 5.

5.

CHECK AIR MIX DOOR OPERATION

Check the operation of the air mix door.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Check the air mix door motor circuit. Refer to

HAC-112, "Air Mix Door Motor Diagnosis Proce-

dure"

.

6.

CHECK AIR DUCTS

Check for disconnected or leaking air ducts.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Repair all disconnected or leaking air ducts.

7.

CHECK HEATER HOSE TEMPERATURES

1.

Start engine and warm it up to normal operating temperature.

2.

Touch both the inlet and outlet heater hoses.

Is the inspection result normal?

YES

>> Hot inlet hose and a warm outlet hose: GO TO 8.

NO

>> Both hoses warm: GO TO 9.

8.

CHECK ENGINE COOLANT SYSTEM

Check engine control temperature sensor. Refer to

XX-XX, "*****"

.

Is the inspection result normal?

HAC-194

< SYMPTOM DIAGNOSIS >

[AUTO AIR CONDITIONER (W/O NAVI)]

INSUFFICIENT HEATING

YES

>> System OK.

NO

>> Repair or replace as necessary. Retest.

9.

CHECK HEATER HOSES

Check heater hoses for proper installation.

Is the inspection result normal?

YES

>> System OK.

NO

>> 1.

Back flush heater core.

2.

Drain the water from the system.

3.

Refill system with new engine coolant. Refer to

XX-XX, "*****"

.

4.

GO TO 10 to retest.

10.

CHECK HEATER HOSE TEMPERATURES

1.

Start engine and warm it up to normal operating temperature.

2.

Touch both the inlet and outlet heater hoses.

Is the inspection result normal?

YES

>> System OK.

NO

>> Replace heater core. Refer to

XX-XX, "*****"

.

NOISE

HAC-195

< SYMPTOM DIAGNOSIS >

[AUTO AIR CONDITIONER (W/O NAVI)]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

NOISE

Component Function Check

INFOID:0000000001547458

SYMPTOM: Noise

INSPECTION FLOW

WJIA1972E