PCM Flash Programming

The PCM has both software and calibrations which are specific to model and option content. This information is stored in PCM in an Electronically Erasable Programmable Read Only Memory (EEPROM). Reprogramming of PCM EEPROM is necessary when replacing a PCM, or when changing calibrations. Both software and calibrations will be reprogrammed at same time a download is performed.

The Service Stall System (SSS) provides a means of reprogramming PCM EEPROM through the Main Menu. The Service Stall System User's Guide and/or system help feature provides the procedure to follow for EEPROM flash reprogramming. When possible vehicle information contained in original controller being replaced should be removed and installed in new PCM. This can only be accomplished by following PCM Replacement functions through SSS in the System Utilities Main Menu. If a PCM needs flash reprogramming and the PCM is incapable of communications, the Vehicle Identification Number (VIN), will have to be manually installed.

In the event the vehicle is not available (i.e. retailer over the counter parts sale), a bench reprogramming tool is available to flash the replacement PCM. The tool (SA9501 Z) is used in conjunction with the SSS to allow connections for flash programming. If the original PCM is available, vehicle information should be pulled from the original and installed in the new. If the old PCM is not available or is incapable of communications, the VIN, must be installed manually.

NOTE: The PCM may be damaged if the reprogramming process is interrupted during download procedures. Verity the Scan tool cable connections are secure and power to the PCM is not interrupted. Make sure the vehicle battery has sufficient charge and the original PCM in the vehicle has the correct VIN and options prior to reprogramming the replacement PCM. Make sure both the Scan tool and service stall system are of equal levels of software prior to reprogramming.