With 7 Inch Display

INSUFFICIENT HEATING





Description

Symptom
- Insufficient heating
- No warm air comes out. (Air flow volume is normal.)




Diagnosis Procedure
1.CHECK COOLING SYSTEM
1. Check the engine coolant level and check for leakage. Inspection.
2. Check radiator cap. Service and Repair.
3. Check water flow sounds of the engine coolant. Refilling Engine Coolant.
Is the inspection result normal?
YES - GO TO 2.
NO - Refill the engine coolant and repair or replace the parts depending on the inspection results.
2.CHECK OPERATION
1. Turn temperature dial and raise temperature setting to 32.0�C (90�F) after warming up the engine.
2. Check that warm air blows from the outlets.
Is the inspection result normal?
YES - INSPECTION END
NO - GO TO 3.
3.CHECK SETTING OF TEMPERATURE SETTING TRIMMER
With CONSULT-III
1. Select "TEMP SET CORRECT" of HVAC work support item. Temperature Setting Trimmer With 7 Inch Display, "Temperature Setting Trimmer".
2. Check that the temperature setting trimmer is set to "- direction".
NOTE:
The control temperature can be set by the temperature setting trimmer.
3. Set the difference between the set temperature and control temperature to "0".
Are the symptoms solved?
YES - INSPECTION END
NO - GO TO 4.
4.CHECK SELF-DIAGNOSIS RESULT CHECK
With CONSULT-III
1. Perform the "SELF-DIAGNOSIS".
2. Check if any DTC is detected in the self-diagnostic results.
NOTE:
If DTC is displayed along with DTC "U1000" or "U1010", first diagnose the DTC "U1000" or "U1010". Climate Control With 7 Inch Display or Climate Control With 7 Inch Display.
Is any DTC displayed?
YES - Perform the diagnosis that is applicable to the sensor and the door motor. Climate Control System With 7 Inch Display Testing and Inspection, "DTC Index".
NO - GO TO 5.
5.CHECK EACH OUTPUT DEVICE
With CONSULT-III
1. Select "HVAC TEST" of HVAC active test item. CONSULT-III Function With 7 Inch Display.

NOTE:
Perform the ACTIVE TEST after starting the engine because the compressor is operated.
2. Refer to the table and check the outlet, inlet, air flow temperature, blower motor control signal, magnet clutch operation, and air mix ratio. Visually check each operating condition, by listening for noise, touching air outlets with a hand, etc.










Does it operate normally?
YES - GO TO 6.
NO-1 - Air outlet does not change. With 7 Inch Display.
NO-2 - Air inlet does not change. With 7 Inch Display.
NO-3 - Discharge air temperature does not change. With 7 Inch Display.
NO-4 - Blower motor does not operate normally. With 7 Inch Display.
NO-5 - Magnet clutch does not operate. With 7 Inch Display.
6.CHECK AIR LEAKAGE FROM DUCT
Check duct and nozzle, etc. of the air conditioning system for air leakage.
Is the inspection result normal?
YES - GO TO 7.
NO - Repair or replace parts depending on the inspection results.
7.CHECK HEATER HOSE INSTALLATION CONDITION
Check the heater hose installation condition visually (for twists, crushes, etc.).
Is the inspection result normal?
YES - GO TO 8.
NO - Repair or replace parts depending on 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:
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 9.
NO - Replace the heater core after performing the procedures after the cooling system inspection. GO
TO 1.
9.REPLACE HEATER CORE
Replace the heater core. Exploded View.
Are symptoms solved?
YES - INSPECTION END
NO - Perform the procedures again after the cooling system inspection. GO TO 1.