Nissan Ariya: Symptom Diagnosis

• Automatic Air Conditioning System Symptoms
• Insufficient Cooling
• Insufficient Heating
• Electric Compressor Does Not Operate

Automatic Air Conditioning System Symptoms

Symptom Table

NOTE:

Perform self-diagnoses with CONSULT before performing the symptom diagnosis. If any DTC is detected, perform the corresponding diagnosis.

Symptom			Corresponding malfunction part	Check item/Reference
Air conditioning system does not activate. NOTE: Fail-safe does not activate.			Fuse A/C auto amp. power supply or ground circuit A/C auto amp.	Check A/C auto amp. power supply or ground circuit. Refer to Diagnosis Procedure.
Air conditioning cannot be controlled.	Display operation			Check AV system Refer to Work Flow.
	A/C control	All control	Fuse A/C control power supply or ground circuit A/C control	Check A/C control power supply and ground circuit. Refer to Diagnosis Procedure.
		A part of control	A/C control	Replace A/C control. Refer to Removal & Installation.
Discharge air temperature does not change.		Driver side	Air mix door motor (driver side) system installation condition	Check air mix door motor (driver side) system is properly installed. Refer to Exploded View.
		Passenger side	Air mix door motor (passenger side) system installation condition	Check air mix door motor (passenger side) system is properly installed. Refer to Exploded View.
Air outlet does not change.	Front	Driver side	Front mode door motor (driver side) system installation condition	Check front mode door motor (driver side) system is properly installed. Refer to Exploded View.
		Passenger side	Front mode door motor (passenger side) system installation condition	Check front mode door motor (passenger side) system is properly installed. Refer to Exploded View.
	Rear		Rear mode door motor system installation condition	Check rear mode door motor system is properly installed. Refer to Exploded View.
Air inlet does not change.			Intake door motor system installation condition	Check intake door motor system is properly installed. Refer to Exploded View.
Blower motor does not operates or operation speed is not normal.			Fusible link Blower motor Blower motor power supply or ground circuit Blower relay power supply or ground circuit Blower relay A/C auto amp.	Check blower motor circuit. Refer to Diagnosis Procedure.
Electric compressor does not operate.			Electric compressor A/C auto amp. Heat pump control unit	Refer to Diagnosis Procedure.
Insufficient cooling No cool air comes out. (Air flow volume is normal.)			Cooler cycle Air leakage from each duct Temperature setting trimmer A/C auto amp.	Refer to Diagnosis Procedure.
Insufficient heating No warm air comes out. (Air flow volume is normal.)			Cooler cycle Air leakage from each duct Temperature setting trimmer A/C auto amp. PTC heater High voltage junction box	Refer to Diagnosis Procedure.
Noise is heard when the air conditioning operates.		During electric compressor operation	Cooler cycle	Symptom table for noise Refer to Symptom Table.
		During blower motor operation	Mixing any foreign object in blower motor Blower motor fan breakage Blower motor rotation inferiority	Check blower motor. Refer to Component Inspection.

Insufficient Cooling

Diagnosis Procedure

Symptom

• Insufficient cooling

• No cold air comes out. (Air flow volume is normal.)

NOTE:

Perform the self-diagnosis with CONSULT before performing the diagnosis by symptom. Perform the diagnosis by DTC if DTC is detected.

CHECK REFRIGERANT CYCLE

Connect recovery/recycling/recharging equipment (for HFO-1234yf) to the Nissan Ariya vehicle and perform the refrigerant system diagnosis. Refer to Symptom Table.

Is the check result normal?

YES>>

GO TO 2.

NO>>

Repair or replace malfunctioning part according to diagnosis result.

CHECK FOR AIR LEAKAGE FROM DUCT

Check duct and nozzle, etc. of A/C system for air leakage.

Is the check result normal?

YES>>

GO TO 3.

NO>>

Repair or replace parts according to the inspection results.

CHECK SETTING OF DIFFERENCE BETWEEN SET TEMPERATURE AND CONTROL TEMPERATURE

With CONSULT

1. Using CONSULT, check the setting of “Temperature setting correct” on “Work support” of “HVAC”. Refer to CONSULT Function.

2. Check that the difference between set temperature and control temperature is set to “+ direction”.

   NOTE:

   The control temperature can be set with a setting difference between the set temperature and control temperature.

3. Change the set temperature correction value to “0”.

Are the symptoms solved?

YES>>

Perform the setting separately if necessary. Inspection end.

NO>>

Replace A/C auto amp. Refer to Removal & Installation.

Insufficient Heating

Diagnosis Procedure

Symptom

• Insufficient heating

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

NOTE:

Perform the self-diagnosis with CONSULT before performing the diagnosis by symptom. Perform the diagnosis by DTC if DTC is detected.

CHECK REFRIGERANT CYCLE

Connect recovery/recycling/recharging equipment (for HFO-1234yf) to the Nissan Ariya vehicle and perform the refrigerant system diagnosis. Refer to Symptom Table.

Is the check result normal?

YES>>

GO TO 2.

NO>>

Repair or replace malfunctioning part according to diagnosis result.

CHECK FOR AIR LEAKAGE FROM DUCT

Check duct and nozzle, etc. of A/C system for air leakage.

Is the check result normal?

YES>>

GO TO 3.

NO>>

Repair or replace malfunctioning part according to diagnosis result.

CHECK SETTING OF DIFFERENCE BETWEEN SET TEMPERATURE AND CONTROL TEMPERATURE

With CONSULT

1. Using CONSULT, check the setting of “Temperature setting correct” on “Work support” of “HVAC”. Refer to CONSULT Function.

2. Check that the difference between set temperature and control temperature is set to “− direction”.

   NOTE:

   The control temperature can be set with a setting difference between the set temperature and control temperature.

3. Change the set temperature correction value to “0”.

Are the symptoms solved?

YES>>

Perform the setting separately if necessary. Inspection end.

NO>>

GO TO 4.

CHECK HIGH VOLTAGE JUNCTION BOX

Check high voltage junction box. Refer to Component Inspection.

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

GO TO 5.

CHECK PTC HEATER

Check PTC heater. Refer to Component Inspection.

Is the inspection result normal?

YES>>

Replace high voltage junction box. Refer to HIGH VOLTAGE JUNCTION BOX : Disassembly & Assembly.

NO>>

Replase PTC heater (refer to Removal & Installation.), and then replace high voltage junction box. Refer to HIGH VOLTAGE JUNCTION BOX : Disassembly & Assembly.

Electric Compressor Does Not Operate

Diagnosis Procedure

Compressor does not operate.

NOTE:

• Perform self-diagnoses with CONSULT before performing symptom diagnosis. If any DTC is detected, perform the corresponding diagnosis.

• Check that refrigerant is enclosed in cooler cycle normally. If refrigerant amount is shortage from proper amount, perform the inspection of refrigerant leakage.

CHECK MALFUNCTION SYMPTOM

Check if there are any symptoms that are not related to the air conditioning system.

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Perform applicable symptom diagnosis.

CHECK HIGH VOLTAGE JUNCTION BOX

Check high voltage junction box. Refer to Component Inspection.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 5.

REPLACE A/C AUTO AMP.

1. Replace A/C auto amp. Refer to Removal & Installation.

2. Check the electric compressor operations in each mode.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

GO TO 4.

REPLACE HEAT PUMP CONTROL UNIT

1. Replace eat pump control unit. Refer to Removal & Installation.

2. Check the electric compressor operations in each mode.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace electric compressor. Refer to Removal & Installation.

CHECK ELECTRIC COMPRESSOR

Check electric compressor. Refer to Component Inspection.

Is the inspection result normal?

YES>>

Replace high voltage junction box. Refer to HIGH VOLTAGE JUNCTION BOX : Disassembly & Assembly.

NO>>

Replace electric compressor (refer to Removal & Installation.), and then replace high voltage junction box. Refer to HIGH VOLTAGE JUNCTION BOX : Disassembly & Assembly.