1993 Cadillac AllanteFACTORY OEM SERVICE PROCEDURE

EEPROM Data Following PCM Replacement

Since the data contained in the EEPROM is specific to the vehicle that the PCM is in, the EEPROM should reset if the PCM is installed in another vehicle. The PCM does this automatically by comparing the season odometer value it has saved to the season odometer value store in the BCM. If these two values are different, the PCM assumes it is in a new vehicle and resets EEPROM data. This reset may also occur if the IPC is replaced. When this reset occurs, the following data will be erased:

  • TP Sensor/Idle Learn
  • Transaxle adapts (shift, steady state, and garage shift)
  • Transaxle oil life
  • Cruise lash learn
Resetting TP Sensor/Idle Learn will trigger Code P080 and resetting transaxle oil life will trigger the "Change Trans Fluid" message. The TP Sensor/Idle Learn can be relearned by following the DTC P080  chart. The transaxle oil life may be reset to its previous value using PCM override PS15. The transaxle adapts will be relearned during normal operation. Cruise lash can be relearned by following the LASH LEARN procedure in CRUISE CONTROL article in ACCESSORIES & EQUIPMENT.

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.