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4-1-3 FI SYSTEM DIAGNOSIS<br />
● When disconnecting and connecting the ECU,<br />
make sure to turn “OFF” the ignition switch, or<br />
electronic parts may get damaged.<br />
● Battery connection in reverse polarity is strictly<br />
prohibited.<br />
Such a wrong connection will damage the<br />
components of the FI system instantly when<br />
reverse power is applied.<br />
● Removing any battery terminal of a running<br />
engine is strictly prohibited.<br />
The moment such removal is made, damaging<br />
counter electromotive force will be applied to the<br />
ECU which may result in serious damage.<br />
● Before measuring voltage at each terminal, check<br />
to make sure that battery voltage is 11V or higher.<br />
Terminal voltage check at low battery voltage will<br />
lead to erroneous diagnosis.<br />
14<br />
INCORRECT
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