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IGNITION SYSTEM
SERVICE INFORMATION
GENERAL
•
When servicing the ignition system, always follow
the
steps in the troubleshooting sequence on page
17-4.
•
The
ignition
timing
cannot be adjusted since the Ignition Control
Module
oeM)
is factory preset.
•
The
Ignition control
module
oeM)
may
be
damaged
if
dropped. Also,
if
the connector is
disconnected
when current is
flowing,
the
excessive voltage may
damage the
module.
•
A faulty ignition
system is often related
to poor
connections.
Check connections before
proceeding.
•
Use
a spark plug of the correct
heat range.
Using a spark plug with an
incorrect
heat
range
can damage the
engine.
SPECIFICATION
ITEM
Spark plug
Standard
(NGK)
IoEN50)
Optional
(NGK)
(DEN SO)
Spark
plug gap
Ignition coil
resistance
Primary
(at 20
"CJ68
"
F)
Secondary
Direct
ignition coil input voltage
Ignition pulse
generator peak voltage
Alternator exciter coil eak voltage
Ignition timing
(M F-
mark)
Thronle
position sensor
resi
stance (at 20
"C/68
O
F)
,
TOROUE VALUES
Timing hole cap
TOOLS
Peak voltage adaptor
07HGJ-0020100
(not available in
U.S.A.)
with commercially available digital
multi meter (impedance
10
MOIDCV
minimum)
5.9
N·m
(0.6 kgf·m,
4.3
Ibf.ft)
IgnitionMate peak voltage tester
MTP07-0286 (U.S.A
.
only)
SPECIFICATION
1
IMRSC9H
VUH24D
lMR9C9H
VUH27D
0.8
-
0.9
mm
(0.03
0.04 in)
0.07
O.lOn
-
4.6
-
6.8
kn
200 V
minimum
0.7 V minimum
50 V minimum
8"
±
2"
BTDCJ1,700 rpm
4-6
kn
Apply grease to the threads
17-3
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Table of Contents
Troubleshooting
