Diagnosis

Insufficient Cooling, No Cooling, Intermittent Cooling

Step 1: Checking Refrigerant Charge
1. Run engine at a fast idle.
2. Operate air conditioner at maximum cooling for a few minutes, go to Step 2.

Step 2: Checking Refrigerant Pressure

1. Connect A/C manifold gauge set.
2. Operate engine at 2,000 rpm and set air conditioner to maximum cooling.
3. Measure low-and high-pressure sides.

Normal pressure
Low-pressure side:
20-41 psi (137-284 kPa, 1.40-2.90 kg/Sq.cm)

High-pressure side:
185-283 psi (1,275-1,814 kPa, 12.0-18.5 kg/Sq.cm)




4. If pressures are not as specified, refer to the chart and check system.