Chrysler
Type:
    Powertrain - Computer and Auxiliary Outputs - ISO/SAE Controlled
Description:
    Generator Field Not Switching Properly Conditions
Cause:
    Engine running, then the PCM detected that it could not regulate the Generator Field properly

Generic
Type:
    Powertrain - Computer and Auxiliary Outputs - ISO/SAE Controlled
Description:
    Generator Field/F Terminal Circuit

GM
Type:
    Powertrain - Computer and Auxiliary Outputs - ISO/SAE Controlled
Description:
    Generator 'F' Terminal Circuit Conditions
Cause:
    Key on Test: No CKP, CMP or Generator codes set, key in RUN position with engine off, then the PCM detected a Generator PWM signal that was more than 65%, conditions met for 5 seconds Run Test: No CKP, CMP or Generator codes set, key in RUN position with engine off, then the PCM detected a Generator PWM signal that was less than 5%, conditions met for 15 seconds