4-4
FI
SYSTEM
DIAGNOSIS
When disconnecting and connecting the ECM, make sure to
turn OFF the ignition switch
@,
or electronic parts may get
damaged.
Battery connection in reverse polarity is strictly prohibited.
Such a wrong connection will damage the components of the
FI system instantly when reverse power is applied.
Removing any battery terminal of a running engine is strictly
prohibited.
The moment such removal is made, damaging counter elec-
tromotive force will be applied to the ECM which may result in
serious damage.
Before measuring voltage at each terminal, check to make
sure that battery voltage is
11
V
or higher. Terminal voltage
check at low battery voltage will lead to erroneous diagnosis.
Never connect any tester (voltmeter, ohmmeter, or whatever)
to the ECM when its coupler is disconnected.
Otherwise, damage to ECM may result.
Never connect an ohmmeter to the ECM with its coupler con-
nected. If attempted, damage to ECM or sensors may result.
Be sure to use a specified voltmeter/ohmmeter. Otherwise,
accurate measurements may not be obtained and personal
injury may result.
INCORRECT
To Next Page
Loading...
Need help?
General
