Circuit Description

The DTC P1510 Control Module Long Term Memory Reset monitors the battery voltage supply to the PCM. The battery positive voltage circuit supplies power to the Powertrain Control Module (PCM) for the retention of long term memory data. Diagnostic trouble codes and learned engine control parameters are kept in the PCM memory even when the ignition is Off. The PCM sets DTC P1510 and loses long term memory when the battery positive voltage circuit is interrupted.