Additional Tests
SYSTEM TEST MENU
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SYSTEM TEST MENU
Additional tests are accessed through the System Tests menu. The
following functions are available:
O2 Sensor Test
- Retrieves and displays O2 sensor monitor test
results from your vehicle's on-board computer.
OBD Monitor Test
- Retrieves and displays test results for
emission-related powertrain components and systems that are not
continuously monitored.
EVAP Test
- Performs a leak test for the vehicle's EVAP system.
1.
While linked to the vehicle, press the
M
button.
The Main Menu displays.
2.
Select
OBD
Mode Tests
, then press
ENTER
.
The System Test menu displays.
If
OBD
Mode Tests
is not
shown on the Main Menu, the
System Tests functions are not
available for the vehicle under
test.
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 the
vehicle's on-board computer.
The Scan Tool does not perform O2 sensor tests, but retrieves
results from the most recently performed O2 sensor tests from
the on-board computer's memory. You may retrieve O2 sensor
test results for only one test of one sensor at any given time.
1.
From the System Test menu, select
O2 Sensor Test,
then press
ENTER
.
2.
A "One moment please..." message
displays, followed by the Select Sensor
screen.
If O2 sensor test data is not
presently stored in the vehicle’s
computer, an advisory message
displays. Choose
Back
(to return
to the System Tests menu) or
Main Menu
, as desired.
