7.7
Section 7
Electrical System and Components
7
Troubleshooting DSAI Ignition Systems
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Ȧȱȱȱǰȱȱǰȱ
ǰȱȱȱȱȱ¢ȱȱ
ǯȱȱ¢ȱȱ¢ȱ
ȱȱȱȱǰȱȱȱȱ
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ȱȱȱȱȱȱǯ
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ȱǯȱȱȱȱȱǰȱ
ȱȱ¡ȱǯȱȱȱȱȬȱ
wires are connected, including the spark plug leads.
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sure the ignition switch is in the RUN position.
Test Procedure for DSAI Ignition Systems
The following procedures are provided for
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engines. They will allow you to isolate and pinpoint
ȱȱǻǼǯ
Special Tools Required:
• Hand Tachometer
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ȱ Ȋȱ ȱȱ
ȱ Ȋȱ ȬȱǻǼ
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ȱ Ȋȱ ȱȱȱŖǯŝŜȱȱǻŖǯŖřŖȱǯǼ
ȘDZȱ ȱȱǻȱȱǯȱ
ȱ ŘśȱŚśśȱŖŗȬǼǰȱȱȱȱȱȱȱ
on these engines. Use of any other tester can
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ȱȱȱȱ¢ȱȱȱ¢ȱ
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ǻȱĴ¢ȱȱȱȱȱȱȱ
ȱȱȱȱǰȱȱȱȂȱ
ȱǼǯȱȱȱȱȱȱȱȱ
and all external loads are disconnected.
Test 1. Isolate and Verify the Trouble is Within the
Engine Ignition System
ȱ ŗǯȱ ȱȱȱȱȱȱȱ
ȱȱȱȱȱȱǯȱ
Separate the connectors and remove the white
ȱȱȱȱȱǯȱȱȱ
connectors and position or insulate the kill lead
terminal so it cannot touch ground. Try to start
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is still present.
DZȱ ȱȱȱȱȱȱȱ¢ȱȱȱ
testing, you may need to ground the kill lead
to shut it down. Because you have interrupted
the kill circuit, it may not stop using the
switch.
ȱ ǯȱ ȱȱȱȱ¢ǰȱȱȱ¢ȱȱ
ȱȱȱǯȱȱȱ¢ȱǰȱ
wires, connections, safety interlocks, etc.
ȱ ǯȱ ȱȱȱǰȱȱȱȱȱ
with the ignition or electrical system of the
ǯȱȱȱȱȱȱȱȱȱ
is completed.
c. Identify the white kill lead of the engine wiring
ȱǯȱȱȱȱȱȱ
known good ground location. The engine should
kill completely. If not, or only one cylinder is
ěǰȱȱȱȱŚǰȱȱȱȱȱȱȱȱ
ȱȱȱȱěȱȱǯȱ
Test 2. Test for Spark
ȱ ŗǯȱ ȱȱȱǰȱȱȱȱ
ȱǯȱȱȱȱȱȱȱȱ
ȱȱȱȱǻȱȱǯȱ
ŘśȱŚśśȱŖŗȬǼǰȱȱĴȱȱȱȱȱȱ
engine ground.
DZȱ ȱȱȱȱǰȱȱȱȱ
ȱ¢ȱȱȱ¢ǯȱ
ǰȱȱ¢ȱȱȱȱǰȱȱ
ȱȱȱȱǯȱȱȱ
ȱȱȱȱȱȱȱȱ
ȱȱȱǯȱȱȱȱ
the engine or perform tests with one spark
plug lead disconnected and not grounded, or
permanent system damage may occur.
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