Circuit Description

Generator communicates with PCM on 2 circuits, the "L" (Light) or "F" (Field) circuit. PCM uses "L" circuit to monitor faults in charging system. The generator "L" terminal indicates whether the PCM is allowing generator to operate. PCM can disable generator under certain conditions to ease starting. Active indicates that PCM is allowing generator operation, while inactive indicates that PCM is not allowing generator operation. If the internal regulator in the generator detects a charging system fault, the regulator will ground generator "F" circuit. PCM then sends a class 2 message to turn on CHARGE indicator light.

DTC will set when either of the following conditions have been met:

• Engine running and generator "L" terminal is low for 15 seconds.
• Engine not running and generator "L" terminal is high for 5 seconds.