Laser 5091 Code Reader User’s Guide
Laser 5091 Code Reader User’s Guide
49
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OBD II regulations require certain vehicles monitor and test oxygen (O2) sensors
to isolate fuel and emissions related faults. The O2 Monitor Test function is used
to retrieve completed O2 sensors monitor test results.
√
The
O2 Monitor Test
is not an on-demand test. O2 sensors are not tested
when selected via the menu but tested when engine operating conditions
are within specifi ed limits.
√ If the vehicle uses a controller area network (CAN) protocol to
communicate, this function is not supported by vehicle. Refer to
“
On-Board Monitor Tests
” on page 50 for O2 monitor data of CAN-
equipped
vehicles.
To retrieve O2 monitor data:
1.
Use
the
UP/DOWN
key to select
O2 Monitor Test
from
Diagnostic Menu
screen.
2.
Press
the
ENTER
key to confi rm
3.
Use
the
UP/DOWN
key to pick desired O2 sensor.
√ If the vehicle being tested does not support this function, the code reader
displays a “Not Support This Function!” message.
4.
Press
the
ENTER
key to view data of selection.
√ When more than one screen of data is retrieved, use the
UP/DOWN
key to
view additional information.
5.
Press
the
BACK
key to return to
O2 Monitor Test
screen.
6.6 O2 Monitor Test