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About the Code Reader 
 
 
DISPLAY FUNCTIONS 
 
 
 
 
47156 7 
 
6.
  YELLOW LED - Indicates there is a possible problem. A “Pending” 
DTC is present and/or some of the vehicle's emission monitors have 
not run their diagnostic testing. 
7.
  RED LED - Indicates there is a problem in one or more of the 
vehicle's systems. The red LED is also used to show that DTC(s) 
are present. DTCs are shown on the Code Reader’s LCD display. In 
this case, the Multifunction Indicator (“Check Engine”) lamp on the 
vehicle's instrument panel will light steady on. 
8.
  LCD Display - Displays test results, Code Reader functions and 
Monitor status information. See DISPLAY FUNCTIONS, below, for 
details. 
9.
  CABLE - Connects the Code Reader to the vehicle's Data Link 
Connector (DLC). 
DISPLAY FUNCTIONS 
Figure 2. Display Functions 
See Figure 2 for the locations of items 1 through 13, following. 
1.
  I/M MONITOR STATUS field - Identifies the I/M Monitor status area. 
2.
  Monitor icons - Indicate which Monitors are supported by the 
vehicle under test, and whether or not the associated Monitor has 
run its diagnostic testing (Monitor status). When a Monitor icon is 
solid, it indicates that the associated Monitor has completed its 
diagnostic testing. When a Monitor icon is flashing, it indicates that 
the vehicle supports the associated Monitor, but the Monitor has not 
yet run its diagnostic testing. 
3.
 
 Vehicle icon - Indicates whether or not the Code Reader is 
being properly powered through the vehicle’s Data Link Connector 
(DLC). A visible icon indicates that the Code Reader is being 
powered through the vehicle’s DLC connector.