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Electronically Erasable Programmable Read Only Memory (EEPROM) Programming

  1. EEPROM must also be programmed if replacing Powertrain Control Module (PCM) or changing Transaxle Control (TC) calibrations. If EEPROM is not programmed, a Diagnostic Trouble Code (DTC) will be set in the PCM.
  2. Ensure battery is fully charged. Ensure cable is properly connected on Data Link Connector (DLC). Perform EEPROM programming using the SSS equipment manufacturer's instructions and latest software applicable for the vehicle model.
    CAUTION: PCM may be damaged if programming procedure is interrupted during the downloading procedure. Ensure cable for scan tool is securely connected to Service Stall System (SSS) equipment and power supply for SSS is securely connected to power supply before proceeding.
    NOTE: Ensure original PCM has the correct Vehicle Identification Number (VIN), vehicle tire size and vehicle options prior to programming the EEPROM. If original PCM is not available or incapable of communicating, the VIN, vehicle tire size and vehicle options must be manually entered into the replacement PCM.
    NOTE: On A/T models, when replacing PCM for an engine related problem, the transaxle adaptives should be transferred from original PCM to replacement PCM. Transaxle adaptives should be reset if replacing PCM for transaxle related failure, transaxle, transaxle line pressure actuator, transaxle valve body or transaxle is overhauled. Transaxle adaptives may be reset using Service Stall System (SSS) equipment or a scan tool.
  3. Once EEPROM is reprogrammed, check for any Diagnostic Trouble Codes (DTCs). See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. Also, after EEPROM is reprogrammed, crankshaft learn procedure and vehicle driveability computer relearn procedure must be performed.
NOTE: Once EEPROM is reprogrammed, the SERVICE indicator light on instrument panel will flash. This is a normal function, as the PCM must learn the crankshaft notches for engine misfire diagnosis. SERVICE indicator light is located on instrument panel, just to the left of the speedometer.
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