Inspection Procedure
INSUFFICIENT COOLING
Inspection procedure
1.CHECK WITH A GAUGE OF RECOVERY/RECYCLING RECHARGING EQUIPMENT
Connect the recovery/recycling recharging equipment to the vehicle and perform the pressure inspection with the gauge.
Is there refrigerant?
YES - GO TO 2.
NO-1 - Check for refrigerant leakages with the refrigerant leakage detecting fluorescent leak detector. Refer to Fluorescent Leak Detector.
NO-2 - GO TO 2 after repairing or replacing the parts according to the inspection results.
2.CHECK CHARGED REFRIGERANT AMOUNT
1. Connect recovery/recycling recharging equipment to the vehicle and discharge the refrigerant.
2. Recharge with the proper amount of refrigerant and perform the inspection with the refrigerant leakage detecting fluorescent leak detector. Refer to Fluorescent Leak Detector.
Is the inspection result normal?
YES - GO TO 3.
NO - Refill the refrigerant and repair or replace the parts according to the inspection results.
3.CHECK REFRIGERANT CYCLE PRESSURE
Connect recovery/recycling recharging equipment to the vehicle and perform the performance test. Refer to Performance Chart.
Is the inspection result normal?
YES - GO TO 4.
NO - Perform the diagnosis with the gauge pressure. Refer to Trouble Diagnosis For Unusual Pressure.
4.CHECK SETTING OF TEMPERATURE SETTING TRIMMER
Check the setting of temperature setting trimmer. Refer to (Without left and right ventilation temperature separately control system) or Temperature Setting Trimmer, "WITH LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL SYSTEM : Temperature Setting Trimmer" (With left and right ventilation temperature separately control system).
1. Check that the temperature setting trimmer is set to "+ direction".
NOTE:
The control temperature can be set with the setting of temperature setting trimmer.
2. Set temperature control dial to "0".
Are the symptoms solved?
YES - Perform the setting separately if necessary. END.
NO - GO TO 5.
5.PERFORM SELF-DIAGNOSIS STEP-2
Perform self-diagnosis STEP-2. Refer to (Without left and right ventilation temperature separately control system) or Diagnosis Description, "WITH LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL SYSTEM : Diagnosis Description" (With left and right ventilation temperature separately control system), see Nos. 1 to 2.
Does code No. 20 appear on the display?
YES - GO TO 6.
NO - Go to appropriate malfunctioning sensor circuit. Refer to Diagnosis Description, "WITHOUT LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL SYSTEM : Diagnosis Description"
(Without left and right ventilation temperature separately control system) or Diagnosis Description, "WITH LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL SYSTEM : Diagnosis Description" (With left and right ventilation temperature separately control system), see No. 11.
6.PERFORM SELF-DIAGNOSIS STEP-4
Perform self-diagnosis STEP-4. Refer to (Without left and right ventilation temperature separately control system) or Diagnosis Description, "WITH LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL SYSTEM : Diagnosis Description" (With left and right ventilation temperature separately control system), see Nos.1 to 5.
Is it operated normally?
YES - GO TO 7.
NO - Perform the diagnosis applicable to each output device.
7.PERFORM SELF-DIAGNOSIS STEP-5
Perform self-diagnosis STEP-5. Refer to (Without left and right ventilation temperature separately control system) or Diagnosis Description, "WITH LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL SYSTEM : Diagnosis Description" (With left and right ventilation temperature separately control system), see Nos.1 to 10.
Is the inspection result normal?
YES - GO TO 8.
NO - Go to appropriate malfunctioning sensor circuit. Refer to Diagnosis Description, "WITHOUT LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL SYSTEM : Diagnosis Description".
(Without left and right ventilation temperature separately control system) or Diagnosis Description, "WITH LEFT AND RIGHT VENTILATION TEMPERATURE SEPARATELY CONTROL SYSTEM : Diagnosis Description" (With left and right ventilation temperature separately control system).
8.CHECK DRIVE BELT
Check tension of the drive belt. Refer to Checking.
Is the inspection result normal?
YES - GO TO 9.
NO - Adjust or replace drive belt.
9.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 10.
NO - Repair or replace parts according to the inspection results.
10.CHECK ECV
Perform the ECV diagnosis procedure. Refer to ECV (Electrical Control Valve).
Is the inspection result normal?
YES - Replace the unified meter and A/C amp.
NO - Replace the compressor.