Additional Tests
SPECIAL TEST MENU
64 OBD2
In addition to retrieving Diagnostic Trouble Codes (DTCs) and viewing Live
Data, you can use the Scan Tool to perform additional diagnostic tests, to
view diagnostic and vehicle information stored in your vehicle's on-board
computer, and to configure the Scan Tool for your particular needs.
SPECIAL TEST MENU
Additional tests are accessed through the
“Special Test Menu.” The following
functions are available from the "Special
Test Menu:"
O2 Sensor Test
- Retrieves and
displays O2 sensor monitor test results
from your vehicle's on-board computer.
Non-Continuous Test
- Retrieves and displays test results for
emission-related powertrain components and systems that are not
continuously monitored.
EVAP Leak Test
- Performs a leak test for the vehicle's EVAP
system.
1.
Start the engine.
2.
Press and release the
LD/M
button.
The “Mode Selection Menu”
displays.
3.
Use the
UP
and
DOWN
buttons,
as necessary, to highlight
Special Test
,
then press the
ENTER
button.
The “Special Test Menu” displays.
O2 Sensor Test
OBD2 regulations require that applicable vehicles monitor and test operation
of the oxygen (O2) sensors to identify problems that can affect fuel
efficiency and vehicle emissions. These tests are performed automatically
when engine operating conditions are within predefined limits. Results of
these tests are stored in the on-board computer's memory.
The
O2 Sensor Test
function lets you retrieve and view O2 sensor
monitor test results for the most recently completed tests from your
vehicle's on-board computer.
Vehicles are equipped with multiple O2 sensors. O2 sensors are
installed both upstream of (before) and downstream of (after) the
exhaust system Catalytic Converters. The name of an O2 sensor
identifies its location in the exhaust system. The name of each O2
sensor is made up of three parts:
O2S XX YY
-or-
O2S X Y
O2S
- this is the basic designation for all O2 sensors.
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