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Section 05 ELECTRICAL SYSTEM
Subsection 03 (IGNITION SYSTEM)
vmr2012-031-005_a
TYPICAL
1. ECM
2. ECM connector cover
3. HIC2 connector
2. Disconnect ECM connector and connect it to
the ECM adapter tool.
REQUIRED TOOL
ECM ADAPTER TOOL
(P/N 529 036 166)
3. Using a multimeter set to
in primary windings as follows.
IGNITION COIL RESISTANCE TEST
ENGINE
PRIMARY
CONNECTOR
CIRCUIT
(HIC)
Cylinder 1
(front)
Pin C
Cylinder 2
(rear)
If any resistance is not good, measure resistance
directly on coil. If second test is ok, check wiring.
Secondary Windings
Due to the integrated diode, it is not possible
to take any resistance measurement of the sec-
ondary winding.
SPARK PLUG
For spark plug replacement procedure, refer to
PERIODIC MAINTENANCE PROCEDURES
section.
Troubleshooting Fouled Spark Plug
Fouling of the spark plug is indicated by irregular
running of the engine, decreased engine speed
due to misfiring, reduced performance, and in-
434
, check resistance
RESISTANCE
ECM
@ 20°C
CONNECTOR
(68°F)
M1
.3 - .6
M2
sub-
creased fuel consumption. This is due to a loss
of compression. Other possible causes are: pro-
longed idling or low-speed riding, a clogged air
filter, incorrect fuel, defective ignition system,
incorrect spark plug gap, lubricating oil entering
the combustion chamber, or too cold spark plug.
The plug face of a fouled spark plug has either a
wet black deposit or a black carbon fouling. Such
coatings form a conductive connection between
the center electrode and ground.
Spark Plug Analysis
1
A00E0AA
TYPICAL
1. Overheated (light grey, white)
2. Normal (light brown, brown)
3. Fouled (black, wet or dry, dark deposits, grey, melted coating)
The plug face reveals the condition of the engine,
operating condition, method of driving and fuel
mixture. For this reason it is advisable to inspect
the spark plug at regular intervals, examining the
plug face (i.e. the part of the plug projecting into
the combustion chamber).
2
3
vmr2015-133
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Table of Contents
Troubleshooting
