DTC P062F: General Description
The powertrain control module (PCM) is equipped with a keep alive memory (KAM). The data (control learn data, etc.) for powertrain control and information (vehicle identification number (VIN), etc.) related to the vehicle control is stored in the KAM, so that it can be maintained even when power is not supplied to the PCM, such as when the 12 volt battery is disconnected. When powered up, the CPU retrieves the stored information from the KAM, as well as writes data to the KAM (control related data is written when the vehicle is turned to the ON mode, and vehicle information when commanded from the HDS). When the data retrieval or data writing process is not finished normally, the PCM detects a malfunction and stores a DTC.