Description

Symptom
• Insufficient cooling

• No cool air comes out. (Air flow volume is normal.)

Diagnosis Procedure

NOTE

:
Perform self-diagnoses with CONSULT-III before performing symptom diagnosis. If any DTC is detected, perform the corresponding diagnosis.

1.CHECK MAGNET CLUTCH OPERATION

1. Turn ignition switch ON.

2. Operate fan control dial.

3. Press A/C switch.

4. Check that A/C indicator turns ON. Check visually and by sound that compressor operates.

5. Press A/C switch again.

6. Check that A/C indicator turns OFF. Check that compressor stops.

Is the inspection result normal? YES >> GO TO 2.

NO >> Perform diagnosis of “COMPRESSOR DOSE NOT OPERATE” in “SYMPTOM DIAGNOSIS”.

Refer to HAC-185, "Diagnosis Procedure".

2.CHECK DRIVE BELT

Check tension of drive belt. Refer to the following.

• HR16DE: Refer to EM-154, "Checking".

• MR16DDT: Refer to EM-20, "Checking".

• K9K: Refer to EM-276, "Checking Drive Belts".

Is the inspection result normal? YES >> GO TO 3.

NO >> Adjust or replace drive belt depending on the inspection results.

3.CHECK REFRIGERANT CYCLE PRESSURE

Connect recovery/recycling recharging equipment to the vehicle and perform pressure inspection with gauge.

Refer to the following.

• HR16DE: Refer to HA-28, "Symptom Table".

• MR16DDT: Refer to HA-83, "Symptom Table".

Is the inspection result normal? YES >> GO TO 4.

NO >> Repair or replace parts depending on the inspection results.

4.CHECK AIR LEAKAGE FROM EACH DUCT

Check duct and nozzle, etc. of the air conditioning system for leakage.

Is the inspection result normal? YES >> GO TO 5.

NO >> Repair or replace parts depending on the inspection results.

5.CHECK AMBIENT TEMPERATURE DISPLAY

Check that there is not much difference between actual ambient temperature and indicated temperature on information display in combination meter.

Is the inspection result normal? YES >> GO TO 6.

NO >> Perform diagnosis for the A/C auto amp. connection recognition signal circuit. Refer to MWI-62, "Diagnosis Procedure".

6.CHECK SETTING OF TEMPERATURE SETTING TRIMMER

1. Check setting value of temperature setting trimmer. Refer to HAC-139, "Temperature Setting Trimmer".

2. Check that temperature setting trimmer is set to “+ direction”.

NOTE

:
The control temperature can be set with the setting of the temperature setting trimmer.

3. Set difference between the set temperature and control temperature to “0”.

Is inspection result normal? YES >> INSPECTION END

NO >> Replace A/C auto amp. Refer to HAC-188, "Removal and Installation".