wsm wg972-e4 - Page 111

ENGINE
WG972-E4, WSM
1-S20
Spark Test
1. Disconnect all injector connector.
2. Remove the spark plug, put it inside the ignition coil firmly, and
then ground the threaded section to the engine body (not to
painted or resin parts).
3. Rotate the starter with the key switch and check that the plug
sparks.
4. If test is OK, tighten the spark plug with a plug wrench.
IMPORTANT
(When reassembling)
• Put the ignition coil inside the spark plug terminal firmly.
• Make sure that the wiring and the ignition coil are correctly
connected.
• Make sure that the removed connectors are correctly
connected.
CAUTION
• This test is hazardous of electric shocks. Never use hand
or screwdriver to press the plug to ground it to the engine
body.
• Keep inflammable away from the engine.
NOTE
• Spark test can be done using the diagnostic tool. Refer to
Diagnosis Manual for more information.
9Y1211108ENS0022US0
Spark Plug Cleaning
1. Remove the spark plug, and remove carbon from the electrode
with a wire brush or other tools.
2. After cleaning, be sure to adjust for proper clearance.
IMPORTANT
• If the spark plug electrode or its insulator is soiled or is
covered with deposited carbon, it may cause engine
trouble.
9Y1211108ENS0115US0
KiSC issued 07, 2015 A