Nissan Tiida C11. Instruction — part 854

HAC-80

< SYMPTOM DIAGNOSIS >

[MANUAL AIR CONDITIONER]

INSUFFICIENT COOLING

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-81

< SYMPTOM DIAGNOSIS >

[MANUAL AIR CONDITIONER]

C

D

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F

G

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J

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A

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HAC

N

O

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INSUFFICIENT HEATING

Component Function Check

INFOID:0000000001547078

SYMPTOM: Insufficient heating

INSPECTION FLOW

1.

CONFIRM SYMPTOM BY PERFORMING OPERATIONAL CHECK - TEMPERATURE DECREASE

1.

Turn temperature control dial clockwise to maximum heat position.

2.

Check for hot air at discharge air outlets.

Can the symptom be duplicated?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK FOR ANY SYMPTOMS

Perform a complete operational check for any symptoms. Refer to

HAC-6, "Operational Check"

.

Does another symptom exist?

YES

>> Refer to

HAC-5, "How to Perform Trouble Diagnosis For Quick and Accurate Repair"

.

NO

>> System OK.

3.

CHECK FOR SERVICE BULLETINS

Check for any service bulletins.

>> GO TO 4.

4.

CHECK COOLANT SYSTEM

1.

Check engine coolant level. Refer to XX-XX, "*****" .

2.

Check hoses for leaks or kinks.

3.

Check Radiator cap. Refer to XX-XX, "*****" .

OK or NG

OK

>> GO TO 5.

NG

>> Repair/replace as necessary.

5.

CHECK AIR MIX DOOR CABLE

Check air mix door cable operation. Refer to XXXX AIR MIX DOOR CABLE ADJUSTMENT .

OK or NG

YES

>> GO TO 6.

NO

>> Adjust or replace air mix door cable. Refer to XXXX AIR MIX DOOR CABLE ADJUST. .

6.

CHECK AIR DUCTS

Check ducts for air leaks.
OK or NG

OK

>> GO TO 7.

NG

>> Repair air leaks.

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 inlet hose hot and the outlet hose warm?

YES

>> GO TO 8.

NO

>> Both hoses warm: GO TO 9.

8.

CHECK ENGINE COOLANT TEMPERATURE SENSOR

Check engine control temperature sensor. Refer to XX-XX, "*****" .

OK or NG

OK

>> System OK.

HAC-82

< SYMPTOM DIAGNOSIS >

[MANUAL AIR CONDITIONER]

INSUFFICIENT HEATING

NG

>> Repair or replace as necessary. Retest.

9.

CHECK HEATER HOSES

Check heater hoses for proper installation.

OK or NG

OK

>> GO TO 10.

NG

>> Repair /replace as necessary. Retest GO TO 7.

10.

BACK FLUSH HEATER CORE

1.

Back flush heater core.

2.

Drain the water from the system.

3.

Refill system with new engine coolant. Refer to XX-XX, "*****" .

4.

Start engine and warm it up to normal operating temperature.

5.

Touch both the inlet and outlet heater hoses.

Is the inlet hose hot and the outlet hose warm? YES or NO

YES

>> System OK.

NO

>> Replace heater core and refill engine coolant. Refer to XXXX .

NOISE

HAC-83

< SYMPTOM DIAGNOSIS >

[MANUAL AIR CONDITIONER]

C

D

E

F

G

H

J

K

L

M

A

B

HAC

N

O

P

NOISE

Component Function Check

INFOID:0000000001547079

SYMPTOM: Noise

INSPECTION FLOW

*1. XXXX OPER. CHECK

*2. XXXX REMOVE OF COMPRESSOR *3. XXXX MAIN. OF OIL QUALITY IM

COMPR.

*4. XX-XX, "*****"

*5. XXXX REMOVE COMPRESSOR

WJIA2226E