With Monochrome Display

INSUFFICIENT HEATING


Component Function Check


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

INSPECTION FLOW
1. CONFIRM SYMPTOM BY PERFORMING OPERATION CHECK - TEMPERATURE INCREASE
1. Press the AUTO switch.
2. Turn temperature control switch (driver side) clockwise until 32�C (90�F) is displayed.
3. Check for hot air at discharge air outlets.
Can a symptom be duplicated?
YES - GO TO 3
NO - GO TO 2
2. CHECK FOR ANY SYMPTOMS
Perform a complete operational check and check for any symptoms. Operational Check.
Does another symptom exist?
YES - With Monochrome Display.
NO - System OK.
3. CHECK FOR SERVICE BULLETINS
Check for any service bulletins.
- GO TO 4
4. CHECK ENGINE COOLING SYSTEM
1. Check for proper engine coolant level. Inspection.
2. Check hoses for leaks or kinks.
3. Check radiator cap. Inspection.
4. Check for air in cooling system.
- GO TO 5
5.CHECK SETTING OF TEMPERATURE SETTING TRIMMER
Using CONSULT-III, check the setting of "TEMP SET CORRECT" on "WORK SUPPORT" of HVAC. With Monochrome Display.
1. Check that the temperature setting trimmer is set to "- direction".

NOTE:
The control temperature can be set by the temperature setting trimmer.
2. Set temperature control dial to "0".
Is the symptom still present?
YES - GO TO 6.
NO - Inspection End.
6.CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III
1. Using CONSULT-III, perform "SELF-DIAGNOSIS RESULTS" of HVAC.
2. Check if any DTC No. is displayed in the trouble diagnosis results.

NOTE:
If DTC is displayed along with DTC U1000 or U1010, first diagnose the DTC U1000 or U1010. With Monochrome Display or With Monochrome Display.
Is any DTC No. displayed?
YES - Perform diagnosis for the applicable DTC. Testing and Inspection.
NO - GO TO 7.
7.CHECK WITH ACTIVE TEST OF CONSULT-III
1. Using CONSULT-III, perform "HVAC TEST" in "ACTIVE TEST" of HVAC to check each output device. With Monochrome Display.

NOTE:
Perform the ACTIVE TEST after starting the engine because the A/C compressor is operating.
2. Refer to the table and check the outlet, inlet, airflow 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 8.
NO-1 - Air outlet does not change. With Monochrome Display.
NO-2 - Air inlet does not change. With Monochrome Display.
NO-3 - Discharge air temperature does not change. With Monochrome Display and With Monochrome Display.
NO-4 - Blower motor does not operate normally. With Monochrome Display.
NO-5 - Magnet clutch does not operate. With Monochrome Display.
8. CHECK AIR DUCTS
Check for disconnected or leaking air ducts.
Is the inspection result normal?
YES - GO TO 9
NO - Repair all disconnected or leaking air ducts.
9. CHECK HEATER HOSE TEMPERATURES
1. Start engine and warm it up to normal operating temperature.
2. Touch both the inlet and outlet heater hoses. The inlet hose should be hot and the outlet hose should be warm.
Is the inspection result normal?
YES - Hot inlet hose and a warm outlet hose: GO TO 10
NO - Both hoses warm: GO TO 11
10. CHECK ENGINE COOLANT SYSTEM
Check thermostat operation. Thermostat And Thermostat Housing.
Is the inspection result normal?
YES - System OK.
NO - Repair or replace as necessary.
11. CHECK HEATER HOSES
Check heater hoses for proper installation.
Is the inspection result normal?
YES - System OK.
NO - 1. Backflush heater core.
2. Drain the water from the system.
3. Refill system with new engine coolant. Changing Engine Coolant.
4. To retest GO TO 12
12. CHECK HEATER HOSE TEMPERATURES
1. Start engine and warm up to normal operating temperature.
2. Touch both the inlet and outlet heater hoses. The inlet hose should be hot and the outlet hose should be warm.
Is the inspection result normal?
YES - System OK.
NO - Replace heater core. Service and Repair.