Seintek S2800 - Alternator Field VR; Alternator Diode

10-26
10.3.11. Alternator Field VR
Measures and compares the pulse width modulated field control signal used by the alternator to
regulate the output.
Path:
Î Î
Î
Alt Field VR
ALT FIELD VR
BLACK TO ENGINE
(CHASSIS)
RED TO FIELD TEST POINT
To engine (chassis)
To field test point
Measures PWM field control
signal to regulate its output.
Normal Alt F/VR waveform
10.3.12. Alternator Diode
Measure and compares alternator diode waveforms
Alternator diode allows current to pass in one direction.
Path:
Î Î
Î
Alt Field VR
ALT DIODE
BLACK TO BATTERY – (NEG)
RED TO BATTERY +(POS)
To battery - (neg)
To battery + (pos)
If the diodes are defective, it
produces high AC voltage.
Normal Alt Diode waveform