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HEX CODE
MIL
CODE
GENERIC
SCAN
TOOL
CODE
DRB SCAN TOOL
DISPLAY
DESCRIPTION OF DIAGNOSTIC TROUBLE
CODE
AE
43**
P0305
Cylinder #5 Mis-fire
Misfire detected in cylinder #5.
or
AF
P0306
Cylinder #6 Mis-fire
Misfire detected in cylinder #6.
B7
31**
P1495
Leak Detect ion Pump
Solenoid Circuit
Leak detection pump solenoid circuit fault (open
or short).
or
B8
P1494
Leak Detect Pump Sw
or Mechanical Fault
Leak detection pump switch does not respond
to input.
BA
11**
P1398
Mis-fire Adaptive
Numerator at Limit
CKP sensor target windows have too much
variation.
BB
31**
P1486
Evap Leak Monitor
Pinched Hose Found
Plug or pinch detected between purge solenoid
and fuel tank.
CO
37
P0785
Shift Solenoid
Performance
* Check Engine Lamp (MIL) will not illuminate if this Diagnostic Trouble Code was recorded. Cycle Ignition
key as described in manual and observe code flashed by Check Engine lamp.
** Check Engine Lamp (MIL) will illuminate during engine operation if this Diagnostic Trouble Code was
recorded.
*** Generator Lamp illuminated
MONITORED SYSTEMS
There are new electronic circuit monitors that
check fuel, emission, engine and ignition perfor-
mance. These monitors use information from various
sensor circuits to indicate the overall operation of the
fuel, engine, ignition and emission systems and thus
the emissions performance of the vehicle.
The fuel, engine, ignition and emission systems
monitors do not indicate a specific component prob-
lem. They do indicate that there is an implied prob-
lem within one of the systems and that a specific
problem must be diagnosed.
If any of these monitors detect a problem affecting
vehicle emissions, the Malfunction Indicator (Check
Engine) Lamp will be illuminated. These monitors
generate Diagnostic Trouble Codes that can be dis-
played with the check engine lamp or a scan tool.
The following is a list of the system monitors:
•
EGR Monitor
•
Misfire Monitor
•
Fuel System Monitor
•
Oxygen Sensor Monitor
•
Oxygen Sensor Heater Monitor
•
Catalyst Monitor
•
Evaporative System Leak Detection Monitor
Following is a description of each system monitor,
and its DTC.
Refer to the appropriate Powertrain Diagnos-
tics Procedures manual for diagnostic proce-
dures.
DTC 21—HEX 66, and 7A—OXYGEN SENSOR
(O2S) MONITOR
Effective control of exhaust emissions is achieved
by an oxygen feedback system. The most important
element of the feedback system is the O2S. The O2S
is located in the exhaust path. Once it reaches oper-
ating temperature 300° to 350°C (572° to 662°F), the
sensor generates a voltage that is inversely propor-
tional to the amount of oxygen in the exhaust. The
information obtained by the sensor is used to calcu-
late the fuel injector pulse width. This maintains a
14.7 to 1 air fuel (A/F) ratio. At this mixture ratio,
the catalyst works best to remove hydrocarbons (HC),
carbon monoxide (CO) and nitrous oxide (NOx) from
the exhaust.
The O2S is also the main sensing element for the
EGR, Catalyst and Fuel Monitors.
The O2S may fail in any or all of the following
manners:
•
Slow response rate
•
Reduced output voltage
•
Dynamic shift
•
Shorted or open circuits
Response rate is the time required for the sensor to
switch from lean to rich once it is exposed to a richer
JX
EMISSION CONTROL SYSTEMS
25 - 9
DESCRIPTION AND OPERATION (Continued)
Summary of Contents for 1997 Stratus Convertible LHD
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