![]() ![]() Please let us know what happens.A 2002 Ford Explorer with a 5R55W transmission came into a shop with a complaint of no 2nd or 5th gear. Refer to Module Reprogramming on the scan tool.Ĭheck out the diagrams (below). This is due to changes made to the strategy or calibration after production, or the need to reset the VID block because it has reached its limit. Refer to Module Reprogramming on the scan tool.Īt certain times, the entire EEPROM needs to be completely reprogrammed. From the Motorcraft(R) homepage, use the search function to find the Module Programming or As-Built Data.įor Ford and Lincoln Mercury technicians, check the Programmable Module Installation link on the PTS website for quick Programmable Module data information by vehicle.Ī PCM which is programmed may require changes to be made to certain VID information to accommodate the vehicle hardware. Non-Ford technicians use the Motorcraft(R) website at Com. For Ford and Lincoln Mercury technicians, contact your National Hotline or the Professional Technician Society (PTS) website for As-Built data listed under the Service Publications Index. Contact the center only if the old PCM cannot be used or the data is corrupt. You may be instructed to contact the As-Built Data Center for the information needed to manually update the VID block with the scan tool. Failure to properly program tire size in revolutions per mile, (rev/mile equals 63,360 divided by the tire circumference in inches), axle ratio, 4x4/4x2, and/or MSOF/ESOF may result in DTCs P1635 and P1639. Make certain that all parameters are included. Using a compatible scan tool, select and carry out the module/parameter programming, referring to the scan tool manufacturer's instruction manual. The stored data can then be downloaded to the new PCM after it has been installed.Ĭarry out manual data entry if the old module is damaged or incapable of communicating. This is done by using a scan tool to retrieve data from the old PCM before removing it from the vehicle. ![]() The first is an automatic data transfer from the old PCM to the new PCM, and the second is manual data entry into the new PCM.Īutomatic data transfer is carried out if the old PCM is capable of communicating. The VID block on a replacement PCM is blank and requires programming. Programming the VID Block for a Replacement PCM Refer to the scan tool manufacturer's instruction manual for details. Programming can be carried out by a local Ford dealer or any non-Ford facility. When this limit is reached, the scan tool displays a message indicating the need to flash the PCM again to reset the VID block. The number of times the VID block may be reconfigured is limited. When changing items in the VID block, the strategy places range limits on certain items such as tire and axle ratio. Only items applicable to the vehicle hardware and supported by the VID block is displayed on the scan tool. Some of these items include the vehicle identification number (VIN), octane adjust, fuel octane, fuel type, vehicle speed limit, tire size, axle ratio, the presence of speed control, and 4-wheel drive electronic shift-on-the-fly (ESOF) versus manual shift-on-the-fly (MSOF). The VID block contains many items used by the strategy for a variety of functions. This is described under Making Changes to the VID Block and also under Making Changes to the PCM Calibration. An incorrect tire/axle ratio is one of the main causes for DTC P1639. Failure to carry out this procedure properly may generate DTC P1635, Tire/Axle Ratio out of Acceptable Range. The VID block in an existing PCM can also be tailored to accommodate various hardware or parameter changes made to the vehicle since production. Failure to carry out this procedure may generate DTCs P1635 or P1639. The VID block is programmed when installing a new PCM as described under Programming the VID Block for a Replacement PCM. The EEPROM contains the vehicle strategy including calibration information specific to the vehicle, and is capable of being programmed or flashed repeatedly.Īs part of the calibration there is an area referred to as the vehicle identification (VID) block. The EEPROM is contained in an integrated circuit internal to the powertrain control module (PCM). Here is how you replace the PCM in the diagrams below:įlash Electrically Erasable Programmable Read Only Memory (EEPROM) What happens is the oxygen sensor heater driver goes out. Please check the PCM connector and if okay the PCM is bad. ![]()
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