Suzuki FL125S Service Manual page 373

INSPECTION
Ignition coil resistance
• Remove the rear center leg shield. (#5-6)
• Disconnect the ignition coil lead wires 1 and 2.
• Remove the ignition coil 3.
• Remove the spark plug cap.
Measure the ignition coil resistance in both the primary and sec-
ondary windings using the multi-circuit tester. If the resistance is
not within the standard value, replace the ignition coil with a new
one.
$ 09900-25008: Multi-circuit tester set
& Tester knob indication: Resistance (Ω)
! Ignition coil resistance
: 2 – 5 Ω (+ Terminal – - Terminal)
Primary
Secondary: 25 – 40 kΩ (Spark plug cap – + Terminal)
CKP sensor peak voltage
• Remove the frame covers, left and right. (#5-7)
NOTE:
Make sure that all of the couplers are connected properly and
the battery is fully charged.
• Disconnect the ECM coupler 1.
• Connect the multi-circuit tester with the peak volt adaptor as
follows.
• Measure the CKP sensor peak voltage between Bl wire and
Br/B wire at the ECM coupler.
+ Probe: Bl wire
- Probe: Br/B wire
$ 09900-25008: Multi-circuit tester set
09900-25009: Needle pointed prove set
%
Before using the multi-circuit tester and peak volt
adaptor, be sure to refer to the appropriate instruction
manual.
• Shift the transmission in the neutral and turn the ignition
switch ON.
• Push the starter button and allow the engine for a few sec-
onds, and then measure the CKP sensor peak voltage.
• Repeat the above test procedure a few times and measure
the highest peak voltage.
' Tester knob indication: Voltage (()
! CKP sensor peak voltage: 2.0 V or more (Bl – Br/B)
ECM coupler (Harness side)
Br/B
ECM
coupler
Bl/Y Bl
CKP
G/W Br/B
sensor
Generator
FL125SDW 8-98
Bl
Peak volt
adaptor