SEKURE SX-3100LCD Operator's Manual Page 205

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OBD 193
55.0 O2S/RPM CHECK
Press 7 to select <O2S/RPM CHECK> from the <FUNCTION SELECT> menu. The
O2S/RPM Check function provides a way to view the oxygen sensor voltages on a line
graph and to monitor the engine RPM.
The O2S/RPM function uses either DLC1 (CHECK) or DLC3 (OBD-II connector). In
order to diagnose all of the O2 Sensors available on the vehicle, use the DLC3 when
available.
ACTIVE KEYS
u d Move highlight up/down.
e Select highlighted menu item.
1 - 2 Select menu item.
DLC1 DIAGNOSIS
Select the O2 Sensors to view and the number of the cylinder on the engine. The O2
Sensor voltage and engine RPM are measured by the Tester directly from the DLC1.
ACTIVE KEYS
l r Select either the O2 sensor or the number of cylinders.
u d Change the O2 sensor or number of cylinders selection.
e Confirm the selections and continue with the test.
DLC3 DIAGNOSIS
Select the O2 Sensors to view. Up to two sensors may be selected. The Sensor voltages
and engine RPM are transmitted by the ECU to the Tester.
ACTIVE KEYS
u d Move cursor up/down.
y Select sensor.
n Deselect sensor.
e Confirm selections and continue with test.
The O2S/RPM screen displays the O2 sensor voltages in an analog waveform chart and
engine RPM.
ACTIVE KEYS
l r Toggle the time scale between 5 seconds and 10 seconds.
e Toggle the display between Hold mode and Real Time mode.
x Return to the <FUNCTION SELECT> menu.
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