1A-85 Engine General Information and Diagnosis:
Step Action Yes No
1 1) Turn the ignition switch OFF.
2) Lift and support the fuel tank. Refer to “Fuel Tank
Removal and Installation in Section 1G (Page 1G-7)”.
3) Check the GP switch coupler (1) for loose or poor
contacts.
If OK, then measure the GP switch voltage.
4) Support the motorcycle with a jack.
5) Fold the side-stand to up position.
6) Disconnect the GP switch coupler.
7) Turn the ignition switch ON.
8) Measure the voltage between the P wire “A” and B/W
wire “B”, P wire “A” and ground, Bl wire “C” and
B/W wire “B”, Bl wire “C” and ground. When shifting the
gearshift lever from 1st to Top.
Special tool
(A): 09900–25008 (Multi-circuit tester set)
Tester knob indication
Voltage ( )
GP switch voltage
0.6 V and more
((+) terminal: P – (–) terminal: B/W, (+) terminal: P –
(–) terminal: Ground,
(+) terminal: Bl –(–) terminal: B/W, (+) terminal: Bl –
(–) terminal: Ground)
Is the voltage OK?
Go to Step 2. Open circuit in the P, Bl
or B/W wire.
1
I944H1110070-01
(A)
“C”
“A”
“B”
I944H1110180-01
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