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IGNITION SYSTEM
TROUBLESHOOTING
•
Inspect
the following
before
diagnosing the
system:
-
Faulty
spark plug
-
Loose
spark
plug
cap or spark plug wire connection
- Water got into
the
spark plug cap (leaking
the ignition
coil secondary voltage)
•
If the engine speed will not
rise
above 2,200
rpm
(min"
) with
the
gearshift
lever in
"R"
position, inspect the
following:
- Gearshift lever linkage adjustment (page
12-15)
-
Reverse
switch
(page
22-22)
- Gear position switch
(page
24-37)
•
If
the
engine speed will not
rise
above
1,750 rpm
(min·'
)
wi th the front brake lever released
and
the gearshift
lever in
"0
"
or
"L·
position, inspect the brake switch (page
22-25)
and its installation condition.
No
spark at spark
plug
~tioncoit
primary
voltage
Ignition
pulse
generator
20-4
UNUSUAL CONDITION
low peak
voltage.
-
No peak voltage.
Peak
voltage
is normal, but no
spark
jumps
at
the plug.
low
peak
voltage.
No peak voltage.
PROBABLE
CAUSE Check
in numerical
order)
1.
Incorrect peak
voltage adapter connections.
~System
is
normal
if
measured
voltage is over
the specifications
with
reverse connections.)
2. The multimeter
impedance
is too low.
3.
Cranking
speed is
too
slow
~Battery
is
under
charged).
4. The
sampling
timing
of
the tester and
measured
pulse
were
not
synchronized. (System is
normal
if
measured
voltage is over
the
standard voltage
at
least once.)
5.
Poorly
connected connectors or an open circuit in the
ignition system.
6.
Faulty
ignition coil.
7.
Faulty
engine control module (EeM) (when
above No.1
through 6 are normal).
,.
Incorrect peak
voltage adaptor connections. (System is
normal if
measured voltage is over
the
specifications
with
reverse
connections.)
2.
Banery
IS
undercharged.
(large
voltage
drop
when
the
engine
is
started.)
3.
Faulty
ignition switch or engine stop switch.
4. Loose
or poorly connected
ECM
connectors.
5.
No
voltage at
the
BlackJwhite (power source) wire of
the
ECM.
6.
Open
circuit or poor
connection
in
the Green
(ground)
wire of
the ECM.
7.
Faulty
peak voltage
adaptor.
8.
Faulty ignition
pulse generator (Measure
peak voltage)
9.
Faulty ECM
(when
above No.1 through 8 are normal).
1.
Faulty
spark plug or leaking ignition coil secondary cur·
rent.
2.
Faulty
ignition coil.
1.
The multi meter
impedance is
too low; below 10 M!)'
DCV.
2. Cranking speed is
too
slow (Banery
is under charged).
3.
The
sampling
timing
of
the tester
and
measured
pulse
were not synchronized.
(System is
normal if
measured
voltage is over
the
standard voltage
at least
once.)
4. Faulty
ignition
pulse
generator (when
above No.1
through 3 are
normal).
1.
Faulty
peak voltage
adaptor.
2.
Faulty
ignition
pulse
generator.
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