CCOT Preliminary Checks

INSUFFICIENT COOLING "QUICK-CHECK" PROCEDURE
Use the following "Hand-Feel" procedure if the system has the proper charge of Refrigerant-12 (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. Selector (mode) lever set at NORM.

4. Temperature lever at 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-Proper condition: check for other problems (Refer to A/C System Diagnostic Procedure).

- INLET PIPE COOLER THAN ACCUMULATOR SURFACE indicates a low refrigerant charge.

- Add amounts 0.113 kg (4 oz.) of refrigerant UNTIL BOTH feel the same temperature. Allow stabilization time between additions.

- For additional diagnosis refer to the accompanying "CCOT Diagnostic Charts." [1][2]CCOT Diagnostic Charts