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# SMU - SECTION 8C1 - REVISED DIAGNOSTIC CHART # 7

#### SUBJECT: SERVICE MANUAL UPDATE - 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 1996-97 TOYOTA CAVALIER

THIS BULLETIN IS BEING ISSUED TO REVISE THE DIAGNOSTIC CHART #7 (AIR CONDITIONING DOES NOT OPERATE) FOUND IN SECTION 8C1 OF THE APPROPRIATE 1996 J/N SERVICE MANUALS.

PLEASE REPLACE CHART #7 WITH THE ATTACHED 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 ====

O 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."

O 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."

O 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 =====

O 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."

O 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."

FIGURES: 00 ATTACHMENTS: 01

GENERAL MOTORS BULLETINS ARE INTENDED FOR USE BY PROFESSIONAL TECHNICIANS, NOT A "DO-IT-YOURSELFER". THEY ARE WRITTEN TO INFORM THOSE TECHNICIANS OF CONDITIONS THAT MAY OCCUR ON SOME VEHICLES, OR TO PROVIDE INFORMATION THAT COULD ASSIST IN THE PROPER SERVICE OF A VEHICLE. PROPERLY TRAINED TECHNICIANS HAVE THE EQUIPMENT, TOOLS, SAFETY INSTRUCTIONS AND KNOW-HOW TO DO A JOB PROPERLY AND SAFELY. IF A CONDITION IS DESCRIBED, DO NOT ASSUME THAT THE BULLETIN APPLIES TO YOUR VEHICLE, OR THAT YOUR VEHICLE WILL HAVE THAT CONDITION. SEE A GENERAL MOTORS DEALER SERVICING YOUR BRAND OF GENERAL MOTORS VEHICLE FOR INFORMATION ON WHETHER YOUR VEHICLE MAY BENEFIT FROM THE INFORMATION.

COPYRIGHT 1996 GENERAL MOTORS CORPORATION. ALL RIGHTS RESERVED.