Inspection Procedure

INSUFFICIENT HEATING

Inspection procedure


1. CHECK COOLING SYSTEM

1.Check engine coolant level and check for leakage. Refer to "Inspection" Inspection.
2.Check radiator cap. Refer to "RADIATOR CAP : Inspection" Service and Repair.
3.Check water flow sounds of engine coolant. Refer to "Refilling" Refilling Engine Coolant.
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" 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- Perform the setting separately if necessary.
NO- GO TO 3

3. CHECK OPERATION

1.Turn temperature control dial and raise temperature setting to 32�C 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 STEP-2

Perform self-diagnosis STEP-2. Refer to "Diagnosis Description" Reading and Clearing Diagnostic Trouble Codes, see Nos. 1 to 3.
Is the inspection result normal?
YES- GO TO 5.
NO- Go to appropriate malfunctioning sensor circuit. Refer to "Diagnosis Description" Reading and Clearing Diagnostic Trouble Codes, see
No. 7.

5. PERFORM SELF-DIAGNOSIS STEP-4

Perform self-diagnosis STEP-4. Refer to "Diagnosis Description" Reading and Clearing Diagnostic Trouble Codes, see Nos. 1 to 6.
Is it installed normally?
YES- GO TO 6.
NO- Perform the diagnosis applicable to each output device.

6. 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 7.
NO- Repair or replace parts according to the inspection results.

7. CHECK HEATER HOSE INSTALLATION CONDITION

Check the heater hose installation condition visually (for twist, crush, etc.).
Is the inspection result normal?
YES- GO TO 8.
NO- Repair or replace parts according to the inspection results.

8. 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 9.
NO- Replace the heater core after performing the procedures after the cooling system inspection again. GO TO 1.

9. REPLACE HEATER CORE

Replace the heater core. Refer to "HEATER CORE : Removal and Installation" Service and Repair.
Are the symptoms solved?
YES- INSPECTION END
NO- Perform the procedures after the cooling system inspection again. GO TO 1.