Suzuki 125 Service Manual page 69

68 RV125K7 ('07-MODEL)
Step 2
1) Connect the TO sensor coupler and ECM coupler.
2) Insert the needle pointed probes to the lead wire coupler.
3) Turn the ignition switch ON.
4) Measure the voltage between Br/W and B/Br wires.
 TO sensor voltage (Normal): 0.4 – 1.4 V
Also, measure the voltage as the motorcycle is leaned.
5) Dismount the TO sensor from its bracket and measure the
voltage when it is leaned 65°, left and right.
 TO sensor voltage (Leaning): 3.7 – 4.4 V
 09900-25008: Multi-circuit tester set
09900-25009: Needle pointed probe set
 Tester knob indication: Voltage ()
Is the voltage OK?
• R, Br/W or B/Br wire open or shorted to ground,
or poor 9, A or 4 connection
• If wire and connection are OK, intermittent trou-
ble or faulty ECM.
YES
• Recheck each terminal and wire harness for
open circuit and poor connection.
• Replace the ECM with a known good one, and
inspect it again.
• Loose or poor contacts on the ECM coupler
NO • Open or short circuit
• Replace the TO sensor with a new one.

When using the multi-circuit tester, do not strongly
touch the terminal of the ECM coupler with a needle
pointed tester probe to prevent the terminal damage
or terminal bend.
6) After repairing the trouble, clear the DTC using SDS tool.
(Page 40)
"24" (P0351) IGNITION SYSTEM MALFUNCTION
* Refer to the IGNITION SYSTEM for details. (RV125K3 6-18)
(+ Br/W – - B/Br)
(+ Br/W – - B/Br)
2
2
65˚
3
ECM coupler (Harness side)
V
V