Kia 2004.5 Spectra Service Technical Training page 72

18
The waveforms show an engine at two speeds with
the following OCV readings:
N N o o t t e e : : T T h h e e p p a a t t t t e e r r n n o o n n t t h h e e r r i i g g h h t t s s h h o o w w s s t t h h e e 0 0 V V
t t r r i i g g g g e e r r p p o o i i n n t t l l o o w w e e r r e e d d b b y y 1 1 g g r r a a d d . .
When the OCV was cycled ON, the voltage dropped
close to zero volts in each. The average voltage
(13.3V & 8.2V) changed due to change in the ON
time. Maximum voltage stayed similar (higher due to
faster RPM for alternator) at 14.6-15.1V. Frequency
should stay the same at 298Hz because the voltage is
constant.
The duty cycle changed due to changes in OCV ON
time. At idle the valve is cycled ON (ground side) 7%
of the time, while at 2000 RPM/Load it is cycled ON
(ground side) 45 % of the time.
N N o o t t e e : : T T h h e e O O C C V V d d e e f f a a u u l l t t p p o o s s i i t t i i o o n n i i s s w w i i t t h h t t h h e e
p p i i s s t t o o n n a a t t r r e e s s t t i i n n i i t t s s n n o o r r m m a a l l l l y y c c l l o o s s e e d d / / n n o o f f l l o o w w
p p o o s s i i t t i i o o n n s s i i m m i i l l a a r r t t o o a a s s p p o o o o l l v v a a l l v v e e . .
2004.5 Spectra Technology
Powertrain