A/C - Service Using Low Side Schrader-Type Valve

9218chevy08

Number: 90-276-1B

Section: 1B

Date: June 1990

Corporate Bulletin No.: 031206


Subject:
AIR CONDITIONING SYSTEM PROCEDURE AND TORQUE SPECIFICATIONS


Model and Year:
1990 CORSICA AND BERETTA WITH 2.2L (VIN CODE G) AND 3.1L (VIN CODE T) ENGINE
1990 BERETTA (GTZ ONLY) WITH 2.3L (VIN CODE A) ENGINE


TO: ALL CHEVROLET DEALERS


1990 CHEVROLET BERETTA GTZ





The A/C system does not have a high side schrader-type valve service fitting. All A/C refrigerant recovery, evacuation and charging procedures must be performed using low side schrader-type valve service fitting located on the accumulator as shown in Figure 1. A/C high side pressure may be read using a Tech-1 (or equivalent) diagnostic tool. The transducer, shown in Figure 2, must be properly installed for proper A/C system operation. Proper transducer torque value is 4.8 N-m (42 lb.in.)





1990 CHEVROLET CORSICA AND BERETTA

Additional torque values for A/C line mounted switches:

- Coolant Fan Pressure Switch
4.8 N-m (42 lb.in.)

- A/C compressor high pressure cut off switch;
4.8 N-m (42 lb.in.)

For these switch locations, refer to Figure 3.