Volvo Penta EGC
Page 26
Relay Test
is test allows the EGC module’s relay outputs to be activated. e test must
be performed with Key ON / Engine OFF. Upon selecting this test you will be
prompted to select either the Ignition Relay output or All Relays (including the
Fuel Pump relay). Pressing the TEST key will activate the selected relay(s) for
approximately two seconds.
• Refer to the engine manufacturer’s service literature for specic
details and safety precautions associated with EGC system relay
testing.
Compression Test
e Compression Test is a special test mode that the EGC system provides to
allow a technician to safely perform a cylinder compression check.
• WARNING: This test commands the EGC module to disable all spark
and fuel injector outputs. The test must be properly exited from the
scan tool in order to re-enable normal spark and fuel operation.
Do not perform this test at sea.
e Compression Test should only be performed dockside or at a service facility
since the engine will be disabled until the test is properly exited.
• If the scan tool is disconnected from the engine during the Compres-
sion Test the engine will remain in a disabled state. You must recon-
nect the scan tool, re-enter the Compression Test mode and then
properly exit the test.
Idle Speed Test
is test allows a technician to verify the operation of the engine’s idle speed
control system. is test must be performed with the engine idling, in neutral
and at normal operating temperature. e test overrides the factory set engine
idle speed and allows a technician to adjust the idle speed between 600 to 2000
RPM. Upon selecting the Idle Speed Test the scan tool will initially command the
engine to idle at 700 RPM. Use the ▲ and ▼ keys to vary the commanded speed
in 100 RPM increments.
• To stop the Idle Speed test at any time, press and hold the scanner’s
NO key.
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