Nissan March K13. Manual - part 384

HAC-70

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

INSUFFICIENT COOLING

2.

Check that the temperature setting trimmer is set to “+ direction”. 
NOTE:
The control temperature can be set with the setting of the temperature setting trimmer.

3.

Set the difference between the set temperature and control temperature to “0”.

Is inspection result normal?

YES

>> INSPECTION END

NO

>> Replace the A/C auto amp.

INSUFFICIENT HEATING

HAC-71

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

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INSUFFICIENT HEATING

Description

INFOID:0000000006024075

Symptom

• Insufficient heating
• No warm air comes out. (Air flow volume is normal.)

Diagnosis Procedure

INFOID:0000000006024076

CAUTION:

Perform the self-diagnoses with on board diagnosis and CONSULT-III before performing symptom
diagnosis. If any malfunction result or DTC is detected, perform the corresponding diagnosis.

1.

CHECK COOLING SYSTEM

1.

Check the engine coolant level and check for leakage. Refer to 

XX-XX, "*****"

.

2.

Check the radiator cap. Refer to 

XX-XX, "*****"

.

3.

Check the water flow sounds of the engine coolant. Refer to 

XX-XX, "*****"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Refill the engine coolant and repair or replace the parts depending on the inspection results.

2.

CHECK HEATER HOSE

Check the installation of heater hose by visually or touching.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace parts depending on the inspection results.

3.

CHECK HEATER CORE

1.

Check the temperature of inlet hose and outlet hose of heater core.

2.

Check that the inlet side of heater core is hot and the outlet side is slightly lower than/almost equal to the
inlet side.

CAUTION:

Always perform the temperature inspection in a short period of time because the engine coolant
temperature is very hot.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Replace the heater core. Refer to 

XX-XX, "*****"

.

4.

CHECK AIR LEAKAGE FROM EACH DUCT

Check duct and nozzle, etc. of the air conditioner system for air leakage.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace parts depending on the inspection results.

5.

CHECK SETTING OF TEMPERATURE SETTING TRIMMER

1.

Check the setting value of temperature setting trimmer. Refer to 

HAC-41, "Temperature Setting Trimmer"

. 

2.

Check that the temperature setting trimmer is set to “

−

 direction”. 

NOTE:
The control temperature can be set by the temperature setting trimmer.

3.

Set the difference between the set temperature and control temperature to “0”.

Are the symptoms solved?

YES

>> INSPECTION END

NO

>> Replace the A/C auto amp.

HAC-72

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

COMPRESSOR DOSE DOT OPERATE

COMPRESSOR DOSE DOT OPERATE

Description

INFOID:0000000006024077

SYMPTOM

Compressor dose not operate. 

Diagnosis Procedure

INFOID:0000000006024078

CAUTION:

• Perform the self-diagnoses with on board diagnosis and CONSULT-III before performing symptom

diagnosis. If any malfunction result or DTC is detected, perform the corresponding diagnosis.

• Check that the refrigerant is enclosed in cooler cycle normally. If the refrigerant amount is shortage

from proper amount, perform the inspection of refrigerant leakage.

1.

CHECK MAGNET CLUTCH OPERATION

Check the magnet clutch. Refer to 

HAC-60, "Component Function Check"

. 

Does it operate normally?

YES

>> GO TO 2.

NO

>> Repair or replace the malfunctioning parts.

2.

CHECK REFRIGERANT PRESSURE SENSOR

Check the refrigerant pressure sensor. Refer to 

XX-XX, "*****"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace the malfunctioning parts.

3.

CHECK BCM INPUT SIGNAL

With CONSULT-III

Check the “COMP REQ SIG” or “FAN REQ SW” in “DATA MONITOR” of BCM.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 5.

4.

CHECK BCM OUTPUT SIGNAL

With CONSULT-III

Check the “A/C ON SIG” or “FAN ON SIG” in “A/C RELAY SIG” of ECM.

Is the inspection result normal?

YES

>> Replace the IPDM E/R. Refer to 

XX-XX, "*****"

 (WITH I-KEY) or 

XX-XX, "*****"

 (WITHOUT I-

KEY).

NO

>> Replace the BCM. Refer to 

XX-XX, "*****"

 (WITH I-KEY) or 

XX-XX, "*****"

 (WITHOUT I-KEY).

5.

CHECK A/C ON SIGNAL

Monitor item

Condition

Status

COMP REQ SIG

A/C switch: OFF

Off

A/C switch: ON

On

FAN REQ SW

Fan control switch: OFF

Off

Fan control switch: ON

On

Monitor item

Condition

Status

COMP REQ SIG

A/C switch: OFF

Off

A/C switch: ON

On

FAN REQ SW

Fan control switch: OFF

Off

Fan control switch: ON

On

COMPRESSOR DOSE DOT OPERATE

HAC-73

< SYMPTOM DIAGNOSIS >

[AUTOMATIC AIR CONDITIONER]

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Check the A/C ON signal. Refer to 

HAC-61, "Component Function Check"

.

Is inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace the malfunctioning parts. 

6.

CHECK BLOWER FAN ON SIGNAL

Check the blower fan ON signal. Refer to 

HAC-63, "Component Function Check"

.

Is the inspection result normal?

YES

>> Replace the A/C auto amp.

NO

>> Repair or replace the malfunctioning parts