INFORMATION ON PCM/EC INFORMATION FLAG 84. Saturn Saturn 1993

For 1990-2009 cars

# INFORMATION ON PCM/EC INFORMATION FLAG 84

#### SUBJECT SERVICE INFORMATION ON PCM/EC INFORMATION FLAG 84

#### MODELS AFFECTED 1993-1994 SATURNS EQUIPPED WITH AUTOMATIC TRANSAXLES

PURPOSE WHEN RESETTING AUTOMATIC TRANSAXLE ADAPTIVES OR DOWNLOADING A TRANSAXLE CALIBRATION USING THE SATURN SERVICE STALL SYSTEM (SSS), A PCM/EC INFORMATION FLAG 84 MAY BE SET. PCM/EC INFORMATION FLAG 84 INDICATES A COMMUNICATIONS FAULT BETWEEN THE PCM/EC AND THE PCM/TC. THIS IS A NORMAL CONDITION WHEN THE ABOVE SSS SERVICE PROCEDURES ARE PERFORMED.

IF A PCM/EC INFORMATION FLAG 84 IS SET FOLLOWING THE RESET OF TRANSAXLE ADAPTIVES OR DOWNLOAD OF A TRANSAXLE CALIBRATION, RESET THE PCM/EC DIAGNOSTIC TROUBLE CODES AND INFORMATION FLAGS USING EITHER THE PORTABLE DIAGNOSTIC TOOL (PDT) OR SATURN SERVICE STALL SYSTEM. IF A PCM/EC INFORMATION FLAG 84 IS SET WITHOUT RESETTING ADAPTIVES OR DOWNLOADING A CALIBRATION, REFER TO THE SERVICE PROCEDURE IN THE "ELECTRONIC ENGINE CONTROLS SERVICE MANUAL."

PCM INFORMATION FLAGS ARE INTENDED TO PROVIDE ADDITIONAL DIAGNOSTIC INFORMATION FOR TECHNICIANS WHEN DIAGNOSING PCM DIAGNOSTIC TROUBLE CODES OR INTERMITTENT CONCERNS AND DO NOT, BY THEMSELVES, INDICATE A PROBLEM WITH THE PCM OR OTHER COMPONENT.

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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 1993 SATURN CORPORATION U.S.A. ALL RIGHTS RESERVED.