Merc manual v5 - Pirate4x4.Com
Merc manual v5 - Pirate4x4.Com
Merc manual v5 - Pirate4x4.Com
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Spark Fire Test<br />
This test allows individual spark outputs to be fired.<br />
<br />
Volvo Penta EGC<br />
WARNING: Engine backfire and external flame can occur during<br />
this test. As a safety precaution, purge fuel vapors from the<br />
engine before proceeding. Do not remove the flame arrestor if<br />
the engine is equipped with one.<br />
IMPORTANT: Before performing this test disconnect the<br />
engine’s Crank Position Sensor.<br />
<br />
This test must be performed with Key-On and Engine Off.<br />
Upon selecting this test you will be prompted to select the spark output to fire. Spark<br />
outputs follow cylinder number order. Use the and keys to select the desired<br />
spark output and then press the FIRE key to start the test. The test will run for<br />
approximately 10 seconds. Use an inductive pickup KV tester to verify the spark<br />
output’s operation.<br />
<br />
To abort the Spark Fire test at any time, press and hold the<br />
scanner’s NO key.<br />
Injector Fire Test<br />
This test allows individual fuel injectors to be pulsed. The test must be performed<br />
with Key ON / Engine OFF. This test is intended to be used for injector leak-down<br />
testing and it can assist a technician in identifying clogged injectors. A fuel pressure<br />
gauge is normally used in conjunction with this test. Refer to the engine<br />
manufacturer's service literature for specific details and procedures on injector<br />
testing.<br />
Upon selecting this test you will first be prompted to select a fuel injector ON time.<br />
The ON time can be adjusted from 1 to 200 milliseconds. Use the and keys to<br />
set the injector ON time and then press the YES key to proceed to the test. Holding<br />
either the or key continuously for more than two seconds accelerates the<br />
injector ON time adjustment.<br />
After setting the time and pressing YES you will be prompted to select the fuel<br />
injector to pulse. Use the and keys to select the desired fuel injector and then<br />
press the FIRE key to activate the injector.<br />
After the injector is pulsed you will be prompted to run the engine for a short period of<br />
time to clear out the unburned fuel from the cylinder. The test cannot be re-run<br />
unless this procedure is performed.<br />
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