Refrigerant

AIR CONDITIONING: REFRIGERANT: ON-VEHICLE INSPECTION

1. INSPECT REFRIGERANT VOLUME

(a) Check the sight glass on the air conditioning tube & accessory assembly.

(1) Prepare the vehicle according to the chart below.

(2) Compare the sight glass to the following chart.

*: Bubbles in the sight glass with the vehicle's interior temperature above 35°C (95°F) can be considered normal if cooling is sufficient.

2. INSPECT REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET

HINT
This is a method where a manifold gauge set is used to help locate the problem.

(a) Read the manifold gauge pressure when the following conditions are established.

Test conditions:

* Temperature at the air inlet with the switch set at RECIRC is 30 to 35°C (86 to 95°F).

* Engine is running at 1,500 rpm.

* Blower speed control switch is at "HI".

* Temperature control dial is at "COOL".

* A/C switch is ON.

* Doors are fully open.

* Ignition switch is in a position that enables the AC compressor to run.

(1) Normally functioning refrigeration system