Example Of Abnormal Waveforms

NOTE:

The size of the waveform patterns differs largely, depending on the adjustment of the variable knob on the oscilloscope.
Identification of abnormal waveforms is easier when there is a large output current (regulator is not operating). (Waveforms can be observed when the headlights are illuminated).
Check the conditions of the generator malfunction light (illuminated/not illuminated). Also, check the charging system totally.

ABNORMAL WAVEFORM	PROBLEM CAUSE
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.	Open diode
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.	Short in diode
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.	Broken wire in stator coil
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.	Short in stator coil