With Monochrome Display
INSUFFICIENT COOLING
Component Function Check
Symptom
- Insufficient cooling
- No cool air comes out. (Airflow volume is normal.)
INSPECTION FLOW
1. CONFIRM SYMPTOM BY PERFORMING OPERATION CHECK - TEMPERATURE DECREASE
1. Press the AUTO switch.
2. Turn temperature control switch (driver side) counterclockwise until 18�C (60�F) is displayed.
3. Check for cold 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 DRIVE BELTS
Check A/C compressor belt tension. Procedures.
Is the inspection result normal?
YES - GO TO 5
NO - Adjust or replace A/C compressor belt. Removal And Installation.
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 with the setting of 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""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 MIX DOOR MOTOR OPERATION
Check and verify air mix door mechanism for smooth operation.
Does air mix door operate correctly?
YES - GO TO 9
NO - Repair or replace air mix door control linkage.
9. CHECK COOLING FAN MOTOR OPERATION
Check and verify cooling fan motor for smooth operation.
Does cooling fan motor operate correctly?
YES - GO TO 10
NO - Check cooling fan motor. Component Inspection (Cooling Fan Motor).
10. CHECK RECOVERY/RECYCLING EQUIPMENT BEFORE USAGE
Check recovery/recycling equipment before connecting to vehicle. Verify there is no pressure in the recovery/recycling equipment by checking the gauges. If pressure exists, recover refrigerant from equipment lines.
- GO TO 11
11. CHECK REFRIGERANT PURITY
1. Connect recovery/recycling equipment to vehicle.
2. Confirm refrigerant purity in supply tank using recovery/recycling and refrigerant identifier.
Is the inspection result normal?
YES - GO TO 12
NO - Check contaminated refrigerant. Service and Repair.
12. CHECK REFRIGERANT PRESSURE
Check refrigerant pressure with manifold gauge connected. With Monochrome Display.
Is the inspection result normal?
YES - Perform diagnostic work flow. With Monochrome Display.
NO - GO TO 13
13. CHECK FOR EVAPORATOR FREEZE-UP
Start engine and run A/C. Check for evaporator freeze-up.
NOTE:
Evaporator freeze up usually occurs at sustained highway speeds in hot, humid conditions with blend door at full-cold and blower on low speed, after 1-3 hours of continuous driving.
Does evaporator freeze up?
YES - Perform diagnostic work flow. Refer With Monochrome Display.
NO - GO TO 14
14. CHECK AIR DUCTS
Check ducts for air leaks.
Is the inspection result normal?
YES - System OK.
NO - Repair air leaks.