4-36 FI SYSTEM DIAGNOSIS
Step 2
1) Connect the TO sensor coupler.
2) Insert the needle pointed probe to the lead wire coupler.
3) Turn the ignition switch ON.
4) Measure the voltage at the wire side coupler between Br/W
and B/Br wires of the TO sensor at horizontal.
% TO sensor voltage: 0.4 – 1.4 V
(
+ Br/W –
- B/Br)
Also, measure the voltage when leaning of the motorcycle.
5) Measure the voltage when it is leaned more than 65 °, left
and right, from the horizontal level.
% TO sensor voltage: 3.7 – 4.4 V
(
+ Br/W –
- B/Br)
! 09900-25008: Multi circuit tester set
09900-25009: Needle pointed probe set
' Tester knob indication: Voltage (()
Is the voltage OK?
“C24” or “C25” IGNITION SYSTEM MALFUNCTION
*Refer to the IGNITION SYSTEM for details. ("8-23)
2
V
2
V
65 ˚
YES
• Red, Br/W or B/Br wire open or shorted to
ground, or poor
0,
a or
X connection.
• If wire and connection are OK, intermittent trou-
ble or faulty ECM.
• Recheck each terminal and wire harness for
open circuit and poor connection.
NO
• Loose or poor contacts on the ECM coupler.
• Open or short circuit in the Br/W wire or B/Br
wire.
• Replace the TO sensor with a new one.
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