Equus 3160 - ABS/SRS + OBD2 Scan Tool - Manual (Page 29)

Using the Scan Tool
CODE RETRIEVAL PROCEDURE
OBD2 27
„ 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
communication link with the vehicle's computer
disconnects. To re-establish communication, press the
POWER/LINK
button again.
„ In OBD2 systems, when an
emissions-related engine malfunc-
tion occurs that causes a DTC to set,
a record or snapshot of engine
conditions at the time that the
malfunction occurred is also saved
in the vehicle’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, vehicle speed,
air flow rate, and intake manifold pressure.
If more than one malfunction is present that causes more than
one DTC to be set, only the code with the highest priority will
contain Freeze Frame data. The code designated “01” on the
Scan Tool display is referred to as the PRIORITY code, and
Freeze Frame data always refers to this code. The priority
code is also the one that has commanded the MIL on.
Retrieved information can be uploaded to a Personal
Computer (PC) with the use of an optional “PC Link Kit.” (see
instructions included with PC-Link program for more
information).
11.
When the last retrieved DTC has been displayed and the DTC
SCROLL button is pressed, the Scan Tool enters the
“enhanced” mode.
„ See VIEWING ENHANCED DTCs on page 32 to view enhanced
DTCs for your vehicle.
„ If you do not wish to view enhanced DTCs, press the DTC
SCROLL
button to return to the OBD2 DTC screen.
If a Manufacturer specific DTC was retrieved during the
code retrieval process, and the manufacturer selected for
the code was not Chrysler, Jeep, Ford, Mazda, General
Motors or Isuzu, pressing the DTC SCROLL
button
after display of the last retrieved DTC returns the screen to
the first retrieved DTC (the Enhanced DTC menu is not
displayed).
12.
Determine engine system(s) condition by viewing the Scan Tool’s
display for any retrieved Diagnostic Trouble Codes, code definitions,
Freeze Frame data and Live Data, interpreting the green, yellow and
red LEDs.