Volvo Penta EGC
Page 25
Spark Fire Test
This test allows individual spark outputs to be fired.
• WARNING:
Engine backfire and external flame can occur during
this test. As a safety precaution purge fuel vapors from the engine
before proceeding. Do not remove the flame arrestor if the engine is
equipped with one.
• IMPORTANT: Before performing this test disconnect the engine’s
Crank Position Sensor.
• This test must be performed with Key-On and Engine Off.
Upon selecting this test you will be prompted to select the spark output to fire.
Spark outputs follow cylinder number order. Use the
▲
and
▼
keys to select the
desired spark output and then press the TEST key to start the test. The test will
run for approximately 10 seconds. Use an inductive pickup KV tester to verify
the spark output’s operation.
• To abort the Spark Fire test at any time, press and hold the scanner’s
NO key.
Injector Fire Test
This test allows individual fuel injectors to be pulsed. The test must be performed
with Key ON/ Engine OFF. This test is intended to be used for injector leak-
down testing and it can assist a technician in identifying clogged injectors. A fuel
pressure gauge is normally used in conjunction with this test. Refer to the engine
manufacturer’s service literature for specific details and procedures on injector
testing.
Upon selecting this test you will first be prompted to select a fuel injector ON
time. The ON time can be adjusted from 1 to 200 milliseconds. Use the
▲
and
▼
keys to set the injector ON time and then press the YES key to proceed to the
test. Holding either the
▲
or
▼
key continuously for more than two seconds
accelerates the injector ON time adjustment.
After setting the time and pressing YES you will be prompted to select the fuel
injector to pulse. Use the
▲
and
▼
keys to select the desired fuel injector and
then press the TEST key to activate the injector.
After the injector is pulsed you will be prompted to run the engine for a short
period of time to clear out the unburned fuel from the cylinder.
The test cannot
be re-run unless the fuel clear out procedure is performed.
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