Functional Test/Check

Use the following Cycling Clutch Orifice Tube (CCOT) "Hand-Feel" procedure if the A/C system has the proper charge of Refrigerant-12 0r -134 (providing ambient temperature is above 21°C (70°F).
1. Engine must be warm and at normal idle speed.
2. Hood and body doors open.
3. Press "A/C" button to activate the air conditioning system.
4. Temperature selector to COLD.
5. Blower on HI.
6. "Hand-Feel" the temperature of the evaporator inlet pipe after the orifice and accumulator with the compressor engaged.
- Both the same temperature and some degree cooler than ambient: Charge is sufficient - check for other problems (Refer to A/C System Diagnostic Procedure).
- If Temperatures Vary: Charge is insufficient. Leak test and check for other problems. Testing and Inspection