Equus 3130 - Scan Tool – OBD2 - Manual (Page 28)

26 OBD2
E
Using the Scan Tool
CODE RETRIEVAL PROCEDURE
■ DTC’s that start with “P1” and some
“P3” are Enhanced (Manufacturer spe-
cific) codes and their code definitions
vary with each vehicle manufacturer.
When an Enhanced (Manufacturer
specific) DTC is retrieved, the LCD dis-
play shows a list of vehicle manufactur-
ers. Use the UP
and DOWN
buttons, as necessary, to highlight the appropriate manufacturer,
then press the ENTER/LD
button to display the correct code
definition for your vehicle.
If the manufacturer for your vehicle is not listed, use the
UP
and DOWN buttons, as necessary, to select
Other manufacturer and press the ENTER/LD but-
ton for additional DTC information.
If the Manufacturer Specific
definition for the currently dis-
played code is not available, an
advisory message shows on
the Scan Tool’s display.
10. If more than one DTC was retrieved,
and to view Freeze Frame Data, press
and release the DTC SCROLL
button, as necessary.
■ Each time the DTC SCROLL button is pressed and
released, the Scan Tool will scroll and display the next DTC in
sequence until all DTCs in its memory have displayed.
■ Freeze Frame Data (if available) will display after DTC #1.
Whenever the Scroll function is used to view additional
DTCs and Freeze Frame Data, the Scan Tool's communi-
cation link with the vehicle's computer disconnects. To re-
establish communication, press the POWER/LINK
button again.
■ In OBD2 systems, when an emis-
sions-related engine malfunction
occurs that causes a DTC to set, a
record or snapshot of engine condi-
tions at the time that the malfunction
occurred is also saved in the vehi-
cle’s computer memory. The record
saved is called Freeze Frame data.
Saved engine conditions include, but are not limited to: engine
speed, open or closed loop operation, fuel system commands,
coolant temperature, calculated load value, fuel pressure, vehi-
cle speed, air flow rate, and intake manifold pressure.