Diagnosis Procedure

INSUFFICIENT HEATING

FRONT AIR CONDITIONER : Diagnosis Procedure

NOTE:
Perform self-diagnoses with on board diagnosis and CONSULT before performing symptom diagnosis. If DTC
is detected, perform the corresponding diagnosis.

1. CHECK COOLING SYSTEM

1.Check engine coolant level and check leakage. Refer to "Inspection" Inspection.
2.Check reservoir tank cap. Refer to "RESERVOIR TANK CAP : Inspection" Service and Repair.
3.Check water flow sounds of the engine coolant. Refer to "Refilling" Refilling Engine Coolant.
Is the inspection result normal?
YES- GO TO 2.
NO- Refill engine coolant and repair or replace parts depending on the inspection results.

2. CHECK HEATER HOSE

Check 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 FRONT HEATER CORE

1.Check temperature of inlet hose and outlet hose of front heater core.
2.Check that inlet side of front 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 front heater core. Refer to "HEATER CORE : Removal and Installation" Removal and Installation.

4. CHECK AIR LEAKAGE FROM EACH DUCT

Check duct and nozzle, etc. of front air conditioning 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 (FRONT)

1.Check setting value of temperature setting trimmer (front). Refer to "FRONT AUTOMATIC AIR CONDITIONING SYSTEM : Temperature Setting Trimmer (Front)" Temperature Setting Trimmer.
2.Check that temperature setting trimmer (front) is set to " direction".
NOTE:
The control temperature can be set by the temperature setting trimmer (front).
3.Set difference between the set temperature and control temperature to "0".
Are the symptoms solved?
YES- INSPECTION END
NO- Replace A/C auto amp. Refer to "Removal and Installation" Service and Repair.