Ignition Coil Inspection; Engine Stop Switch Inspection - Suzuki RM-Z450 Owner's Service Manual

IGNITION COIL INSPECTION

• Remove the seat and fuel tank. ("5-2)
• Disconnect the ignition coil lead wire coupler 1 and spark
plug cap 2.
• Measure the ignition coil resistance.
# Ignition coil resistance
White/Blue –
Primary
Black/White
Plug cap –
Secondary
Black/White
! 09900-25008: Multi-circuit tester set
& Tester knob indication: Resistance (Ω)
If the resistance is not within the standard range, replace the
ignition coil with a new one.

ENGINE STOP SWITCH INSPECTION

• Remove the seat and fuel tank. ("5-2)
• Disconnect the engine stop switch lead wire coupler 1.
• Measure the engine stop switch resistance between Black/
Yellow lead wire and Black/White lead wire.
# Engine stop switch resistance
Black/Yellow –
ON
Black/White
Black/Yellow –
OFF
Black/White
! 09900-25008: Multi-circuit tester set
09900-25009: Needle pointed probe set
& Tester knob indication: Resistance (Ω)
If the measurement is out of the specification, the cause may lie
in the engine stop switch.
If the measurement is within the specification, check the continu-
ity between the engine stop switch coupler and CDI unit coupler.
Normally, use the needle pointed probe to the back-
side of the lead wire coupler to prevent the terminal
bend and terminal alignment.
0.17 – 0.70 Ω
9 – 14 kΩ
Under 1 Ω
∞ Ω (Infinity)
CAUTION
ELECTRICAL SYSTEM 14-9
B/Y
B/W