Refrigerant

AIR CONDITIONING: REFRIGERANT: ON-VEHICLE INSPECTION

ON-VEHICLE INSPECTION

1. 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 these 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.
- Engine switch is in a position that enables the AC compressor to run.

(1) Normally functioning refrigeration system.
Gauge reading:
Low pressure side
0.15 to 0.25 MPa (1.5 to 2.5 kgf/cm2, 21.3 to 35.5 psi)
High pressure side
1.37 to 1.57 MPa (14 to 16 kgf/cm2, 199.1 to 227.5 psi)
(2) Moisture is present in refrigeration system.