Merc manual v5 - Pirate4x4.Com

Volvo Penta EGC
Drive by Wire Test
This test is available only when connected to engines equipped with Electronic
Throttle Control (ETC). The test allows a technician to check the functionality of the
ETC system by commanding the engine throttle blade to track helm throttle control
lever movements.
This test must be performed with Key ON / Engine OFF. Upon selecting this test
you will be prompted to move the helm throttle lever and observe movements of the
engine throttle blade. The scan tool will also display the commanded Throttle
Control Position percentage as well as the commanded Throttle Position
percentage (percentage of throttle blade movement).
To stop the Drive by Wire test at any time, press and hold the
scanner’s NO key.
O2 Sensor Test (O2 / catalyst equipped engines only)
This test is available only when connected to an engine equipped with oxygen sensors
and one or more catalytic converters. The test allows a technician to check the
functionality of the O2 sensor feedback system by automatically cycling the engine
through rich and lean phases of operation. This test must be performed with the
engine idling and gear selector in the Neutral position.
The engine's speed will be increased to approximately 1200 rpm
during the test.
To abort the O2 Sensor test at any time, press and hold the
scanner’s NO key.
This test runs automatically and consists of several phases of operation. The
particular phase being executed by the ECM will be indicated on the scan tool's
display screen. Also displayed is the elapsed time that the test has been in progress as
shown in the photo below.
O2 Sensor Test display
When the O2 sensor test is complete the scan tool will scroll messages across its
screen displaying the results of the pre-catalyst and post-catalyst oxygen sensors. A
message will also be displayed instructing the technician to scan for ECM fault codes
to obtain additional information on any O2 sensor problem that was detected during
the test.
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