B TROUBLESHOOTING
Troubleshooting Procedure
1.
Determine what
is
wrong with the system.
2. First read the diagram
so
you understand the system. Refer
to
the
component operation boxed
within
the
system circu it.
3. Locate
the
cause of
the
problem.
a. Determine whether
the
problem
is
with the common circuit (power source
or
ground)
or
individual circuit.
Check
other
loads
or
switches which are
in
parallel with
the
problem component.
If they are normal,
the
problem lies within
the
particular system itself.
Refer
to
the
POWER
SOURCE
or
GROUND POINTS and check
the
related systems.
(NOTE: Each component
is
grounded at 2
or
3 points.)
If the related systems are normal, the common circuit (power source or ground points)
is
okay.
The problem lies within
the
indiVjdual system.
b. Locate
the
exact point
of
the problem by narrowing down the
flrea
with a voltmeter
or
test
lamp.
->,.,:,'/'"
4. Repair and re-check
the
circuit.
If any wiring was disconnected for troubleshooting, re-connect it and check
the
related circuits.
Voltage Check
1.
Establish conditions
in
which voltage
is
present
at
the check point.
IRefer
to
component operations.)
Example:
® - Ignition
SIW
on
® - Ignition
SIW
and
SIW
1 on
© - IgnitionSIW,
SIW
1 and Relay on
(SIW
2
off)
2. Using a voltmeter, ·connect the negative lead
to
a good ground point
or
negative battery ter-
minal and
the
positive lead
to
the connector
or
component terminal. This check can be done
with a test lamp instead
of
a voltmeter.
To
Ignitio;o
8/W
IG
Terminal
!
fuse
®
81W
1
®
Relay
©
~'[11
'--+-
.....
Solenoid
Voltmeter
0"
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