Generator L Lamp Circuit

The scan tool displays Gen. L Lamp as Active or Inactive.

The PCM can use the L circuit to control generator operation during starting. If the PCM is disabling the generator, the scan tool will display Active, or the disable operation of the generator is active. The PCM also supplies about 5 volts through the L circuit to the generator. If the generator becomes inoperative, the PCM senses the fault through the L circuit and commands the Instrument Panel Cluster (IPC) to turn on the volts telltale.