On Vehicle Inspection

LOCATION

DAMPER POSITION

ON-VEHICLE INSPECTION

1. INSPECT REFRIGERANT VOLUME
Observe the sight glass on the liquid tube.
Test conditions:
^ Running engine at 1,500 rpm
^ Blower speed control switch set at "HI"
^ A/C switch ON
^ Temperature control set at "MAX. COOL"
^ Fully open doors




2. INSPECT IDLE-UP SPEED
a. Warm up engine
b. Inspect idle up speed when the these conditions are established:
^ Blower switch "HI"
^ Temperature control dial "MAX. COOL"
^ A/C switch "O"
^ Put gear shift in neutral
If idle speed is not as specified, check the IAC valve and air intake system.

3. INSPECT FOR LEAKAGE OF REFRIGERANT
a. Perform under these conditions:
^ Stop engine.
^ Secure good ventilation (If not, the gas leak detector may react to volatile gases which are not refrigerant, such as evaporated gasoline or exhaust gas.)
^ Repeat the test 2 or 3 times.
^ Make sure that there is some refrigerant remaining in the refrigeration system.
When compressor is OFF: approximately 392 - 588 Kpa (4 - 6 kgf/sq.cm, 57 - 85 psi)




b. Bring the gas leak detector close to the drain hose before performing the test.

HINT:
^ After the blower motor is stopped, leave the A/C unit for more than 15 minutes.
^ Expose the gas leak detector sensor the under the drain hose.
^ When bring the gas leak detector close to the drain hose, make sure that the gas leak detector does not react to the volatile gases.

If such reaction is unavoidable, the vehicle must be lifted up.

c. If gas leak is not detected through the drain hose, remove the blower motor linear controller from the A/C unit. Then insert the gas leak detector sensor into the unit and perform the test.




d. Disconnect the connector and leave the pressure switch for approximately 20 minutes. Then bring the gas leak detector close to the pressure switch and perform the test.
e. Bring the gas leak detector close to the refrigerant lines and perform the test.

HINT: Make sure that there is no dirt on joints.