User Manual

Using the Scan Tool
CODE RETRIEVAL PROCEDURE
3040e 35
The green, yellow and red LEDs are used (with the LCD
display) as visual aids to make it easier to determine
engine system conditions.
 Green LED - Indicates that all
engine systems are "OK" and
running normally. All monitors on
the vehicle are active and are
performing their diagnostic testing,
and no trouble codes are present. A
zero will show on the Scan Tool’s
display, and all Monitor icons will be
solid.
 Yellow LED - Indicates one of the following conditions:
PENDING CODE PRESENT - If the
yellow LED is lit, it may indicate the
existence of a pending code. Check
the Scan Tool’s LCD display for
confirmation. A pending code is
confirmed by the presence of a
numeric code and the word PENDING
on the Scan Tool’s LCD display.
MONITOR STATUS - If the Scan
Tool’s LCD display shows a zero
(indicating there are no DTCs present
in the vehicle's computer), but the
yellow LED is lit, it indicates a "Monitor
Has Not Run" status. This means that
some of the Monitors on the vehicle
have not yet finished their diagnostic
self-testing. This condition is
confirmed by one or more blinking
Monitor icons on the LCD display. A
blinking Monitor icon means the
Monitor has not yet run and finished
its diagnostic self-testing. All Monitor
icons that are solid have completed
their diagnostic self-testing.
 Red LED - Indicates there is a
problem with one or more of the
vehicle's systems. The red LED is
also used to show that DTC(s) are
present (displayed on the Scan Tool’s
LCD display). In this case, the
Malfunction Indicator (Check Engine)
lamp on the vehicle's instrument panel
will light steady on.