Kia 2004.5 Spectra Service Technical Training page 121

2004.5 Spectra Technology
INTRODUCTION
Driveability
Motor vehicles contribute volatile organic compounds
(VOC) and oxides of nitrogen (N0x) to the
atmosphere. These substances chemically react to
form photochemical oxidant or smog. With stricter
emissions standards for motor vehicles, emissions have
improved over the years due to such items as higher
technology engine management and emission systems.
The 2004.5 Spectra is equipped with a modern
Siemens Powertrain Control Module (PCM) for
driveability management and emission control when
equipped with A/T. The PCM manages the engine and
transaxle, monitors related systems and the On-Board
Diagnostic (OBDII) system that proactively tests
emission related systems and/or components.
The PCM receives input from sensors, processes the
input, and controls actuators to maintain an average
air/fuel ratio of 14.7:1 (stoichiometric), for the best
possible treatment of emissions.
PURPOSE
The 2004.5 Spectra Engine Management System was
designed to provide maximum power and fuel
economy while meeting minimal exhaust emissions.
The EMS has many components and functions, and
the one most obvious to the driver is the Malfunction
Indicator Lamp (MIL) or Check Engine Lamp (CEL).
When the ignition key is first turned ON, the driver
should see the MIL illuminates for bulb check.
Illumination indicates proper operation before turning
OFF. If the lamp does not illuminate or does not turn
OFF, the system will need to be inspected.
This indicator lamp is part of the Engine Management
System (EMS) that monitors various emission control
systems and components. The lamp illuminating while
driving or after performing the bulb check indicates
that a potential problem has been detected
somewhere in the emission control system.
Generally the Spectra will continue to be drivable but
this MIL illumination serves as a warning to the driver
that the vehicle requires the attention of a Kia
technician.
N N o o t t e e : : T T h h e e o o w w n n e e r r ' ' s s m m a a n n u u a a l l a a d d v v i i s s e e s s t t h h e e f f u u e e l l
f f i i l l l l e e r r c c a a p p b b e e t t i i g g h h t t b b e e c c a a u u s s e e t t h h e e M M I I L L m m a a y y i i l l l l u u m m i i n n a a t t e e . .
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