Innova 3120d, Руководство пользователя, Страница: 109 / 131

Additional Tests
SPECIAL TEST MENU
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„ 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. While linked to the vehicle, press the M
button.
„
The Main Menu displays.
2. Use the UP and DOWN buttons,
as necessary, to highlight Special Test,
then press the ENTER
button.
„
The Special Test menu displays.
If Special Test is not
shown on the Main Menu,
the Special Test functions
are not available for your
vehicle.
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.
„
X or XX - These characters identify the location of the O2 sensor in
relation to a cylinder bank. An O2 sensor for cylinder bank 1 is
identified by the designation “1” or "B1"; a sensor for cylinder bank 2
is identified as “2” or "B2."
”Bank One” indicates the side of the engine where cylinder
number one is located (V-type engines). Bank Two is opposite
of Bank One.
„
Y or YY - These characters identity the location of the O2 sensor in
relation to the exhaust system catalyst. An O2 sensor located upstream
of the catalyst is identified by the designation”1” or "S1", a sensor lo-
cated downstream of the Catalytic Converter is identified as “2” or "S2."