Inspection Procedure

INSUFFICIENT HEATING


Inspection procedure

1.CHECK COOLING SYSTEM
1. Check engine coolant level and check for leakage. Refer to Inspection.
2. Check radiator cap. Refer to Radiator Cap.
3. Check water flow sounds of engine coolant. Refer to Refilling.
Is the inspection result normal?
YES - GO TO 2.
NO - Refill the engine coolant and repair or replace the parts according to the inspection results.
2.CHECK SETTING OF TEMPERATURE SETTING TRIMMER
1. Check the setting of temperature setting trimmer. Refer to Temperature Setting Trimmer.
2. Check that the temperature setting trimmer is set to "- direction".

NOTE:
The control temperature can be set with the setting of temperature setting trimmer.
3. Set temperature control dial to "0".
Are the symptoms solved?
YES - INSPECTION END
NO - GO TO 3.
3.CHECK OPERATION
1. Turn temperature dial (driver side) and raise temperature setting to 32�C (90�F) after warming up the engine.
2. Check that warm air blows from outlets.
Is the inspection result normal?
YES - INSPECTION END
NO - GO TO 4.
4.PERFORM SELF-DIAGNOSIS
Perform self-diagnosis function. Refer to Scan Tool Testing and Procedures.
Is the inspection result normal?
YES - GO TO 5.
NO - Repair or replace parts according to the inspection results.
5.CHECK AIR LEAKAGE FROM DUCT
Check duct and nozzle, etc. of A/C system for air leakage.
Is the inspection result normal?
YES - GO TO 6.
NO - Repair or replace parts according to the inspection results.
6.CHECK HEATER HOSE INSTALLATION CONDITION
Check the heater hose installation condition visually (for twist, crush, etc.).
Is the inspection result normal?
YES - GO TO 7.
NO - Repair or replace parts according to the inspection results.
7.CHECK TEMPERATURE OF HEATER HOSE
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:
The temperature inspection should be performed in a short time because the engine coolant temperature is too hot.
Is the inspection result normal?
YES - GO TO 8.
NO - Replace the heater core after performing the procedures after the cooling system inspection again. GO TO 1.
8.REPLACE HEATER CORE
Replace the heater core. Refer to heater core. Refer to Exploded View.
Are the symptoms solved?
YES - INSPECTION END
NO - Perform the procedures after the cooling system inspection again. GO TO 1.