Computers & Controls - PCM/ABS Module EEPROM Listing
BULLETIN NO.: 96-T-46BISSUE DATE: July, 1998
GROUP/SEQ. NO.: General Info - 02
CORPORATION NO.: 380106R
SUBJECT:
1991 - 1999 Powertrain Control Module (PCM) and Antilock Brake System (ABS) EEPROM Listing (Information)
MODELS AFFECTED:
1991-1999 Saturns
Due to additions and changes to 1996-1997 vehicles and addition of 1999 vehicles, this bulletin supercedes bulletin 96-T-46A, which should be discarded.
PURPOSE:
The charts summarize 1991-1999 Saturn powertrain control module (PCM) engine, transaxle and antilock brake controller electrically erasable/programmable read-only memory (EEPROM) calibrations released to date.
When any diagnosis leads to EEPROM calibration, the Saturn Service Stall System (SSS) EEPROM reprogramming feature will provide a list of valid EEPROM calibrations for the vehicle and allow you to select the appropriate one for reprogramming. The EEPROM calibrations listed on the charts may vary from the (SSS) selections if updates are made by satellite or CD-ROM prior to updating this bulletin.
IMPORTANT:
Model year 1996 PCMs have been discontinued and will be back serviced with model year 1997 PCMs, software and calibrations. EEPROM calibration changes may be made for many different reasons. For instance, a calibration change may be made in conjunction with component changes, for a change relative to a current field condition, or as a production running change to provide minor modifications affecting driveability or fuel economy. Also, replacement of a PCM or ABS controller will require reprogramming of the service replacement part. Service part PCMs and 1991 1997 ABS controllers must be reprogrammed with options and EEPROM calibrations before they will function properly.
IMPORTANT:
1997-1999 ABS controllers do not require reprogramming. New service ABS controllers have been programmed by the supplier.
Where applicable, always refer to the specific technical information bulletin listed for details about the symptom that may require an EEPROM calibration change.
The illustrations shown explain how to read the charts.
1991 - 1995 PCM EEPROM MATRIX
1996 - 1999 PCM EEPROM MATRIX
1991 - 1999 ABS EEPROM MATRIX
DISCLAIMER