Kia 2004.5 Spectra Service Technical Training page 74

OIL TEMPERATURE
SENSOR (OTS)
20
The OCV is a non-service item and is replaced when
defective. When the CVVT sticks, the camshafts real
position and target position as determined by the PCM
is not matched. If it's stuck in the advanced position,
engine vibration and stoppage can occur at idle.
N N o o t t e e : : T T h h e e c c a a m m s s h h a a f f t t p p o o s s i i t t i i o o n n a a n n d d P P C C M M t t a a r r g g e e t t
p p o o s s i i t t i i o o n n c c a a n n b b e e o o b b s s e e r r v v e e d d o o n n t t h h e e H H i i - - S S c c a a n n p p r r o o . .
C C a a u u t t i i o o n n : : D D o o n n ' ' t t t t o o u u c c h h t t h h e e O O C C V V s s l l e e e e v v e e o o r r u u s s e e t t h h e e
!
O O C C V V a a s s a a n n e e n n g g i i n n e e h h a a n n d d l l e e . .
Oil Temperature Sensor (OTS) is located on the exterior
side of the cylinder head in the engine oil passage. The
OTS is a 2-wire NTC type resistor sensor. It is a 5-volt
feedback sensor that measures the engine oil
temperature and provides this information to the PCM.
The Oil Control Valve (OCV) control signal is
compensated by the PCM depending on the OTS signal.
Engine oil flow is PCM controlled to move the CVVT
control valve in order to change valve timing. The PCM
uses the oil temperature information to compensate for
its control signal to the OCV. The OCV directs oil to
move the CVVT unit and changes valve timing.
2004.5 Spectra Technology
Powertrain