Suzuki RM-Z250 Service Manual page 287

CKP SENSOR AND CRANKSHAFT ROTATION
SIGNAL SENSOR PEAK VOLTAGE
• Disconnect the magneto lead wire coupler 1.
• Connect the multi circuit tester with the peak volt adaptor A
as follows.
.
CKP sensor
+ probe
R
- probe
G
 09900-25008: Multi circuit tester set
• Measure the highest peak voltage by depressing the kick
starter lever several times forcefully.

When using the multi circuit tester and peak volt adap-
tor, refer to the appropriate instruction manual.
• Repeat the above procedure a few times and measure the
highest sensor peak voltage.
 CKP sensor peak voltage: 2.8 V and more
Crankshaft rotation signal sensor peak voltage:
 Tester knob indication: Voltage ()
If the peak voltage is within the specification, check the continu-
ity between the magneto lead wire coupler and ECM coupler.

Normally, use the needle-point probe to the backside
of the lead wire coupler to prevent the terminal bend
and terminal alignment.
Crankshaft rotation signal sensor
B/R
R/W
3.5 V and more
ELECTRICAL SYSTEM 15-15
R/W
G
Bl B/W G/W
B
ECM coupler (Harness side)
B/R
R