A/C - Diagnostic Charts Revisions
File in Section: 8 - Chassis/Body ElectricalBulletin No.: 63-83-11
Date: November, 1996
SERVICE MANUAL UPDATE
Subject:
Section 8C1 - Revised Diagnostic Chart # 7 and Various Other Changes
Models:
1996-97 Buick Skylark
1996-97 Chevrolet Cavalier
1996-97 Oldsmobile Achieva
1996-97 Pontiac Grand Am, Sunfire
This bulletin is being issued to revise the diagnostic Chart # 7 (Air Conditioning Does Not Operate) found in Section 6C1 of the appropriate 1996 J/N Service Manuals.
Please replace Chart # 7 with the revised chart.
Also, the following changes should be made to various other sections in both the 1996 and 1997 Service Manuals as indicated below:
J-Car
^ Page 1B-11 (1996); Page 1B-10 (1997):
Step 3 - Checking Compressor Clutch
Engagement - In the left column of boxes, fifth box down, right branch, second box down reads: "Repair electrical circuit to the compressor clutch."
Change to read: "Repair electrical circuit to the compressor clutch. Refer to Engine Controls, Instrument Panel Cluster (IPC) Microprocessor and HVAC: Compressor Controls, Cell 64 in Electrical Diagnosis."
^ Page 6E-59 (1996); Page 6E-279 (1997):
Under "Circuit Description", the last bullet in the list reads: "There is no A/C request signal to the PCM. Refer to Section 1B for more information on the A/C refrigerant systems."
Change to read: "Refer to Heating and Air Conditioning, Instrument Panel Cluster (IPC) Microprocessor and HVAC: Compressor Controls, Cell 64 in Electrical Diagnosis for more information on the A/C refrigerant systems."
^ Page 6E-61 (1996); Page 6E-281 (1997):
A/C Compressor Clutch Control Circuit Diagnosis Table, Step 16, part 2 reads: "Probe the A/C selector switch input circuit to the IPC (refer to Section 8A-64)."
Change to read: "Probe the A/C selector switch input circuit to the IPC. Refer to Heating and Air Conditioning, Instrument Panel Cluster (IPC) Microprocessor and HVAC: Compressor Controls, Cell 64 in Electrical Diagnosis for more information on the A/C refrigerant systems."
N-Car
^ Page 1B-10 (1996); Page 1B-9 (1997):
Step 2 Checking Refrigerant Charge/Checking Compressor Clutch Engagement - The sixth box down, one box right, one box down, one box right, third box down reads: "Repair electrical circuit to the compressor clutch. Refer to Section 8A-64 for further diagnostics."
Change to read: "Repair electrical circuit to the compressor clutch. Refer to Engine Controls, Instrument Panel Cluster (IPC) Microprocessor and HVAC: Compressor Controls, Cell 64 in Electrical Diagnosis."
^ Page 6E-61 (1996); Page 6E-267 (1997):
Under "Circuit Description", the last bullet in the list reads: "There is no A/C request signal to the PCM. Refer to Section 1B for more information on the A/C refrigerant systems."
Change to read: "Refer to Heating and Air Conditioning, Instrument Panel Cluster (IPC) Microprocessor and HVAC: Compressor Controls, Cell 64 in Electrical Diagnosis for more information on the A/C refrigerant systems."