Suzuki Boulevard M50, Service Manual

Page: 219 / 454

5-62 FI SYSTEM
Step 2
1) Turn the ignition switch OFF.
2) Disconnect the STP sensor coupler.
3) Check the continuity between each terminal and ground.

STP sensor continuity:
∞ Ω
(Infinity)
(Terminal – Ground)
4) If OK, then measure the STP sensor resistance at the wire
terminals (between Yellow wire
A
and Black wire
B
).
5) Loosen the inlet pipe screw. (

2-7)
Lift up the inlet pipe. (

5-45)
6) Close and open the secondary throttle valve by finger, and
measure the valve closing and opening resistance.

STP sensor resistance
Secondary throttle valve is closed : Approx. 0.5 k
Ω
Secondary throttle valve is opened: Approx. 3.9 k
Ω
(Yellow
A
– Black
B
)
7) If OK, then measure the STP sensor resistance at the wire
terminals (between Blue wire
C
and Black wire
B
).

STP sensor resistance: Approx. 4.69 k
Ω

09900-25008: Multi-circuit tester set

Tester knob indication: Resistance (
Ω
)
Are the continuity and resistance OK?
8) After repairing the trouble, clear the DTC using SDS tool.
(

5-25)
2
2
2 2
YES Go to Step 3.
NO
• Reset the STP sensor position correctly.
• Replace the STP sensor with a new one.
2
SA
MP
LE