Equus 3140 - Scan Tool CanOBD2&1 Kit - Manual (Page 31)

CanOBD2&1 29
E
OBD2 Systems
CODE RETRIEVAL PROCEDURE
10. If more than one code was retrieved press the DTC SCROLL
button, as necessary, to display additional codes one at a time.
■ Each time the DTC SCROLL button is pressed and released,
the CanOBD2&1 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
codes, the CanOBD2&1 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 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.
If more than one malfunction is present that causes more
than one DTC to be set, only the code with the highest pri-
ority will contain Freeze Frame data. The code designated
“01” on the CanOBD2&1 Scan Tool’s 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. Determine engine system(s) condition by viewing the CanOBD2&1
Scan Tool’s display for any retrieved Diagnostic Trouble Codes,
code definitions, Freeze Frame data and interpreting the green,
yellow and red LEDs.
■ If DTC’s were retrieved and you are going to perform the repairs
yourself, proceed by consulting the Vehicle’s Service Repair
Manual for testing instructions, testing procedures, and flow
charts related to retrieved code(s).
■ If you plan to take the vehicle to a professional to have it serviced,
complete the Preliminary Vehicle Diagnosis Worksheet on
page 15 and take it together with the retrieved codes, freeze frame
data and LED information to aid in the troubleshooting procedure.