Suzuki GW250 Service Manual page 182

• Voltage
 09900-25008: Multi circuit tester set
 Tester knob indication: Voltage ()
– Between V wire and ground: approx. 0 V (When ignition
switch is ON)
Is check result OK?
YES Go to Step 4.
NO Repair or replace the V wire.
Step 4
TP sensor check
1) Turn the ignition switch OFF.
2) Connect the ECM couplers and TP sensor coupler.
3) Insert the needle-point probes to the lead wire coupler.
4) Turn the ignition switch ON.
5) Measure the TP sensor output voltage between the V wire
terminal + and B/Br wire terminal - with turning the throttle
grip open and close.
 09900-25008: Multi circuit tester set
09900-25009: Needle-point probe set
 Tester knob indication: Voltage ()
 TP sensor output voltage:
Throttle valve is closed: Approx. 1.1 V
Throttle valve is opened: Approx. 4.4 V
(+ terminal: V – - terminal: B/Br)
Is check result OK?
Replace the ECM with a known good one, and
YES
inspect it again.
Replace the TP sensor with a new one.
NO
(4-91)
FI SYSTEM DIAGNOSIS 4-41
3
4
V