Dtcs And Mil Status - Launch Creader Professional 909E User Manual

LAUNCH
Misfire Monitor
(Type 2)
Fuel System
Monitor
Catalytic
Converter
Monitor
O Sensor
2
Monitor
O Sensor
2
Heater Monitor
EGR Monitor
EVAP system
Monitor
Secondary Air
System
Monitor

2.7 DTCs and MIL Status

When the vehicle's on-board computer detects a failure in an emissions-related
component or system, the computer's internal diagnostic program assigns a
diagnostic trouble code (DTC) that points to the system (and subsystem) where
the fault was found. The diagnostic program saves the code in the computer's
memory. It records a "Freeze Frame" of conditions present when the fault was
found, and lights the Malfunction Indicator Lamp (MIL). Some faults require
detection for two trips in a row before the MIL is turned on.
Note: The "Malfunction Indicator Lamp" (MIL) is the accepted term used
to describe the lamp on the dashboard that lights to warn the driver that an
emissions-related fault has been found. Some manufacturers may still call
this lamp a "Check Engine" or "Service Engine Soon" light.
There are two types of DTCs used for emissions-related faults: Type "A" and
Type "B." Type "A" codes are "One-Trip" codes; Type "B" DTCs are usually Two-
Continuous 1
Continuous 1
Once per trip 1
Once per trip 1
Once per trip 1
Once per trip 1
Once per trip 1
Once per trip 1
Professional 909E User Manual
3 - similar
1 1
conditions
3 - similar
1 or 2 1
conditions
2 1
2 1
2 1
2 1
2 1
2 1
80
80
3 trips 40
3 trips 40
3 trips 40
3 trips 40
3 trips 40
3 trips 40
15