A/C - Revised DTC P0530 (Refrigerant), P1639 (Voltage)
File In Section: 6E - Engine Fuel & EmissionBulletin No.: 61-65-61
Date: December, 1996
SERVICE MANUAL UPDATE
Subject:
Section 6E3 - Driveability and Emissions - Revised DTC PO53O and P1639
Models:
1996 Buick Park Avenue
1996-97 Buick LeSabre, Riviera
1996-97 Chevrolet Camaro
1996-97 Oldsmobile Eighty Eight, LSS
1996 Oldsmobile Ninety Eight
1997 Oldsmobile Regency
1996-97 Pontiac Bonneville, Firebird
with 3.8L Engine (VINs K, 1 - RPOs L36, L67)
This bulletin is being issued to revise the circuit diagram included in the diagnostic support information for DTC P0530 A/C Refrigerant Pressure Sensor Circuit and DTC P1639 5 Volt Reference (B) Circuit. Make the following changes to the circuit diagrams for DTC P0530 and DTC P1639:
^ PCM Pin C1-17 (circuit 474) should be 5 Volt Ref B, not A/C Refrigerant Pressure Sensor Signal
^ PCM Pin C2-73 (circuit 380) should be A/C Refrigerant Pressure Sensor Signal, not 5 Volt Ref B.