Inspection procedure

1. Check engine coolant level and check for leakage. Refer to "INSPECTION " (VQ37VHR) or "INSPECTION " (VK50VE).
2. Check radiator cap. Refer to "RADIATOR CAP: INSPECTION " (VQ37VHR) or "RADIATOR CAP: INSPECTION " (VK50VE).
3. Check water flow sounds of engine coolant. Refer to "REFILLING " (VQ37VHR) or "REFILLING " (VK50VE).

   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.

1. Check the setting of temperature setting trimmer. Refer to "WITHOUT ACCS: TEMPERATURE SETTING TRIMMER " (WITHOUT ACCS) or "WITH ACCS: TEMPERATURE SETTING TRIMMER " (WITH ACCS).
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. INSPECTION END.

   NO: GO TO 3.

1. Turn temperature dial (driver side) and raise temperature setting to 32.0°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.

Perform self-diagnosis function. Refer to "WITHOUT ACCS: DIAGNOSIS DESCRIPTION " (WITHOUT ACCS) or "WITH ACCS: DIAGNOSIS DESCRIPTION " (WITH ACCS).

Is the inspection result normal? 

YES: GO TO 5.

NO: Repair or replace parts according to the inspection results.

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.

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.

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.

Replace the heater core. Refer to "EXPLODED VIEW " (VQ37VHR) or "EXPLODED VIEW " (VK50VE).

Are the symptoms solved? 

YES: INSPECTION END

NO: Perform the procedures after the cooling system inspection again. GO TO  1.