Suzuki Boulevard M50 User Manual

5-64 FI SYSTEM
“C31” (P0705) GP SWITCH CIRCUIT MALFUNCTION
INSPECTION
Step 1
1) Remove the secondary gear case cover.
(2-16)
2) Turn the ignition switch OFF.
3) Check the GP switch coupler 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) Make sure the engine stop switch is in the “RUN” position.
7) Insert the needle pointed probe to the lead wire coupler.
8) Turn the ignition switch ON.
9) Measure the voltage at the wire side coupler between Pink
wire A and B/W wire B, when shifting the gearshift lever from
1st to Top.
 GP switch voltage: 0.6 V and more
(+ P A – - B/W B)
 09900-25008: Multi-circuit tester set
09900-25009: Needle pointed probe set
 Tester knob indication: Voltage ()
DETECTED CONDITION POSSIBLE CAUSE
No Gear Position switch voltage.
Switch voltage is not within the following range.
Switch voltage > 0.6 V
• Gear Position switch circuit open or short
• Gear Position switch malfunction
• ECM malfunction
Side-stand switch
Neutral indicator
light
N
1
5
4
2
3
ECM
GP switch
Side-stand relay
Ignition
switch
BI
BI
P
P
B/W B/W
GP
To engine stop switch
1
1
V
SAMPLE

Suzuki Boulevard M50 Specifications

General

Compression Ratio	9.4:1
Fuel System	Fuel injection
Ignition	Electronic ignition (transistorized)
Transmission	5-speed constant mesh
Final Drive	Shaft drive
Front Suspension	Inverted telescopic, coil spring, oil damped
Front Tire	130/90-16M/C 67H, tubeless
Rear Tire	170/80-15M/C 77H, tubeless
Ground Clearance	140 mm (5.5 in)
Seat Height	700 mm (27.6 in)
Engine Type	4-stroke, liquid-cooled, V-twin
Bore x Stroke	83.0 mm x 74.4 mm
Rear Suspension	coil spring, oil damped
Front Brakes	Single hydraulic disc
Rear Brakes	Drum
Fuel Tank Capacity	15.5 L (4.1 US gal)
Wheelbase	1, 655 mm (65.2 in)