Innova 3100j, Руководство пользователя, Страница: 71 / 108

Additional Functions
SYSTEM TEST MENU
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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
System Tests , then press the ENTER
button.
„ The System Test menu displays.
If System Tests is not shown on the Main Menu, the
System Tests 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."
For example, O2S12 or O2SB1S2 is the designation for the
downstream O2 sensor for cylinder bank 1.
The diagnostic 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.