Volvo Penta EGC
Page 27
Drive by Wire Test
is test is available only when connected to engines equipped with Electronic
rottle Control (ETC). e 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.
is 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. e scan tool will also display the commanded rottle
Control Position percentage as well as the commanded rottle Position percent-
age (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)
is test is available only when connected to an engine equipped with oxy-
gen sensors and one or more catalytic converters. e 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. is 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.
is test runs automatically and consists of several phases of operation. e par-
ticular phase being executed by the ECM will be indicated on the scan tool’s dis-
play screen. Also displayed is the elapsed time that the test has been in progress.
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 problems that were
detected during the test.
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