deterioration, the fuel injection system uses two
heated oxygen sensors. One sensor upstream of the
catalytic convertor, one downstream of the convertor.
The PCM compares the reading from the sensors to
calculate the catalytic convertor oxygen storage
capacity and converter efficiency. Also, the PCM uses
the upstream heated oxygen sensor input when
adjusting injector pulse width.
When the catalytic converter efficiency drops below
emission standards, the PCM stores a diagnostic
trouble code and illuminates the malfunction indica-
tor lamp (MIL).
The automatic shutdown relay supplies battery
voltage to both the upstream and downstream heated
oxygen sensors. The oxygen sensors are equipped
with a heating element. The heating elements reduce
the time required for the sensors to reach operating
temperature.
UPSTREAM OXYGEN SENSOR
The input from the upstream heated oxygen sensor
tells the PCM the oxygen content of the exhaust gas.
Based on this input, the PCM fine tunes the air-fuel
ratio by adjusting injector pulse width.
The sensor input switches from 0 to 1 volt, depend-
ing upon the oxygen content of the exhaust gas in
the exhaust manifold. When a large amount of oxy-
gen is present (caused by a lean air-fuel mixture), the
sensor produces voltage as low as 0.1 volt. When
there is a lesser amount of oxygen present (rich air-
fuel mixture) the sensor produces a voltage as high
as 1.0 volt. By monitoring the oxygen content and
converting it to electrical voltage, the sensor acts as
a rich-lean switch.
The heating element in the sensor provides heat to
the sensor ceramic element. Heating the sensor
allows the system to enter into closed loop operation
sooner. Also, it allows the system to remain in closed
loop operation during periods of extended idle.
In Closed Loop, the PCM adjusts injector pulse
width based on the upstream heated oxygen sensor
input along with other inputs. In Open Loop, the
PCM adjusts injector pulse width based on prepro-
grammed (fixed) values and inputs from other sen-
sors.
The upstream oxygen sensor threads into the out-
let flange of the exhaust manifold (Fig. 11) or (Fig.
12).
Fig. 10 Engine Coolant Temperature Sensor—2.5L
COOLANT FILL
NECK
ENGINE COOLANT TEMPER-
ATURE SENSOR
AIR
INLET
TUBE
Fig. 11 Upstream Heated Oxygen Sensor—2.0/
2.4LEngines
OXYGEN
SEN-
SORS
EXHAUST
MANIFOLD
Fig. 12 Upstream Oxygen Sensor—2.5L
CATALYTIC
CON-
VERTOR
UPSTREAM
HEATED
OXY-
GEN SENSOR
JA
FUEL SYSTEM
14 - 33
DESCRIPTION AND OPERATION (Continued)
Содержание Stratus LHD 1997
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Страница 296: ...Charging System Schematic Typical JA CHARGING SYSTEM 8C 3 DIAGNOSIS AND TESTING Continued ...
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Страница 343: ...8D 34 IGNITION SYSTEM JA SPECIFICATIONS Continued ...
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Страница 438: ...Fig 3 Multi Function SwitchContinuity Test JA TURN SIGNAL AND FLASHERS 8J 5 DIAGNOSIS AND TESTING Continued ...
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Страница 472: ...Fig 1 Headlamp Alignment Screen Typical Fig 2 Fog Lamp Alignment Typical JA LAMPS 8L 3 ADJUSTMENTS Continued ...
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Страница 525: ...Fig 5 Symbol Identification 8W 01 4 8W 01 GENERAL INFORMATION JA DESCRIPTION AND OPERATION Continued ...
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Страница 816: ...Fig 4 Engine Connections 2 0L 2 4L JA 8W 90 CONNECTOR GROUND LOCATIONS 8W 90 9 DESCRIPTION AND OPERATION Continued ...
Страница 817: ...Fig 5 Engine Connections 2 5L 8W 90 10 8W 90 CONNECTOR GROUND LOCATIONS JA DESCRIPTION AND OPERATION Continued ...
Страница 818: ...Fig 6 Transmission Connections JA 8W 90 CONNECTOR GROUND LOCATIONS 8W 90 11 DESCRIPTION AND OPERATION Continued ...
Страница 819: ...Fig 7 Steering Column Connections 8W 90 12 8W 90 CONNECTOR GROUND LOCATIONS JA DESCRIPTION AND OPERATION Continued ...
Страница 820: ...Fig 8 Instrument Panel Connections JA 8W 90 CONNECTOR GROUND LOCATIONS 8W 90 13 DESCRIPTION AND OPERATION Continued ...
Страница 821: ...Fig 9 Instrument Panel Connections 8W 90 14 8W 90 CONNECTOR GROUND LOCATIONS JA DESCRIPTION AND OPERATION Continued ...
Страница 822: ...Fig 10 Junction Block Connections JA 8W 90 CONNECTOR GROUND LOCATIONS 8W 90 15 DESCRIPTION AND OPERATION Continued ...
Страница 823: ...Fig 11 HVAC Connections 8W 90 16 8W 90 CONNECTOR GROUND LOCATIONS JA DESCRIPTION AND OPERATION Continued ...
Страница 824: ...Fig 12 Body Connections JA 8W 90 CONNECTOR GROUND LOCATIONS 8W 90 17 DESCRIPTION AND OPERATION Continued ...
Страница 825: ...Fig 13 Body Connections 8W 90 18 8W 90 CONNECTOR GROUND LOCATIONS JA DESCRIPTION AND OPERATION Continued ...
Страница 826: ...Fig 14 Body Connections JA 8W 90 CONNECTOR GROUND LOCATIONS 8W 90 19 DESCRIPTION AND OPERATION Continued ...
Страница 827: ...Fig 15 Roof Connections 8W 90 20 8W 90 CONNECTOR GROUND LOCATIONS JA DESCRIPTION AND OPERATION Continued ...
Страница 829: ...Fig 18 Deck Lid Connections 8W 90 22 8W 90 CONNECTOR GROUND LOCATIONS JA DESCRIPTION AND OPERATION Continued ...
Страница 833: ...Fig 5 Engine Splices 2 0L 2 4L 8W 95 4 8W 95 SPLICE LOCATIONS JA DESCRIPTION AND OPERATION Continued ...
Страница 834: ...Fig 6 Engine Splices 2 5L JA 8W 95 SPLICE LOCATIONS 8W 95 5 DESCRIPTION AND OPERATION Continued ...
Страница 835: ...Fig 7 Body Splices 8W 95 6 8W 95 SPLICE LOCATIONS JA DESCRIPTION AND OPERATION Continued ...
Страница 836: ...Fig 8 Deck Lid Splices Fig 9 Door Splices JA 8W 95 SPLICE LOCATIONS 8W 95 7 DESCRIPTION AND OPERATION Continued ...
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Страница 975: ...Adapter 6887 Camshaft Seal Installer 6863 9 138 2 5L ENGINE JA SPECIAL TOOLS Continued ...
Страница 995: ...Fig 2 Exhaust System Leaded Fuel 11 2 EXHAUST SYSTEM AND INTAKE MANIFOLD JA GENERAL INFORMATION Continued ...
Страница 1001: ...13 6 BUMPERS AND FRAME JA SPECIFICATIONS Continued ...
Страница 1065: ...Fuel Line Adapter 1 4 14 64 FUEL SYSTEM JA SPECIAL TOOLS Continued ...
Страница 1071: ......
Страница 1106: ...SPECIAL TOOLS POWER STEERING PUMP Installer C 4063B Puller C 4333 P S System Analyzer 6815 JA STEERING 19 35 ...
Страница 1236: ...41TE TRANSAXLE HYDRAULIC SCHEMATIC JA TRANSAXLE 21 105 SCHEMATICS AND DIAGRAMS Continued ...
Страница 1237: ...41TE TRANSAXLE HYDRAULIC SCHEMATIC 21 106 TRANSAXLE JA SCHEMATICS AND DIAGRAMS Continued ...
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Страница 1247: ...41TE TRANSAXLE HYDRAULIC SCHEMATIC 21 116 TRANSAXLE JA SCHEMATICS AND DIAGRAMS Continued ...
Страница 1248: ...41TE TRANSAXLE HYDRAULICSCHEMATIC JA TRANSAXLE 21 117 SCHEMATICS AND DIAGRAMS Continued ...
Страница 1257: ...Remover 6787 Cooling System Tester 7700 Seal Remover 7794 a 21 126 TRANSAXLE JA SPECIAL TOOLS Continued ...
Страница 1271: ......
Страница 1287: ...SPECIFICATIONS SUNROOF COMPONENTS 23 16 BODY JA ...
Страница 1318: ...SPECIAL TOOLS BODY REMOVER MOLDINGS C 4829 STICK TRIM C4755 JA BODY 23 47 ...
Страница 1319: ......
Страница 1321: ...Fig 1 Floor Console 23 2 BODY JA REMOVAL AND INSTALLATION Continued ...
Страница 1359: ......
Страница 1375: ...ENGINE VACUUM SCHEMATIC 2 0L 25 16 EMISSION CONTROL SYSTEMS JA DIAGNOSIS AND TESTING Continued ...
Страница 1376: ...ENGINE VACUUM SCHEMATIC 2 4LATX JA EMISSION CONTROL SYSTEMS 25 17 DIAGNOSIS AND TESTING Continued ...
Страница 1377: ...ENGINE VACUUM SCHEMATIC 2 5LATX 25 18 EMISSION CONTROL SYSTEMS JA DIAGNOSIS AND TESTING Continued ...
Страница 1387: ......
Страница 1401: ...FASTENER IDENTIFICATION 6 INTRODUCTION JA GENERAL INFORMATION Continued ...
Страница 1404: ...METRIC CONVERSION JA INTRODUCTION 9 GENERAL INFORMATION Continued ...
Страница 1512: ...41TE TRANSAXLE HYDRAULIC SCHEMATIC JA TRANSAXLE 21 105 SCHEMATICS AND DIAGRAMS Continued ...
Страница 1513: ...41TE TRANSAXLE HYDRAULIC SCHEMATIC 21 106 TRANSAXLE JA SCHEMATICS AND DIAGRAMS Continued ...
Страница 1514: ...41TE TRANSAXLE HYDRAULIC SCHEMATIC JA TRANSAXLE 21 107 SCHEMATICS AND DIAGRAMS Continued ...
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Страница 1523: ...41TE TRANSAXLE HYDRAULIC SCHEMATIC 21 116 TRANSAXLE JA SCHEMATICS AND DIAGRAMS Continued ...
Страница 1524: ...41TE TRANSAXLE HYDRAULICSCHEMATIC JA TRANSAXLE 21 117 SCHEMATICS AND DIAGRAMS Continued ...
Страница 1533: ...Remover 6787 Cooling System Tester 7700 Seal Remover 7794 a 21 126 TRANSAXLE JA SPECIAL TOOLS Continued ...