DTC P16E4: General Description
Driven by the engine, the alternator generates electricity according to the commands from the powertrain control module (PCM). The local interconnect network (LIN) line is connected to the alternator and transmits/receives information to/from the PCM. The PCM sets a target generating voltage in the range of 12.5 V to 14.5 V and commands the alternator via the LIN line. The alternator output signal (duty signal) is sent to the PCM, and is varied according to the 12 volt battery's state of charge, the electrical load, and the engine speed. The voltage regulator in the alternator runs a self-diagnostic function by PCM command, the results are transmitted via the LIN line. If the self-diagnosed results are judged that the alternator temperature is too high, the PCM detects a malfunction and stores a DTC.