Suzuki GW250 Service Manual page 215

4-74 FI SYSTEM DIAGNOSIS
• Voltage
 09900-25008: Multi circuit tester set
 Tester knob indication: Voltage ()
– Between W, B or B/Br wires and ground: approx. 0 V
(When ignition switch is ON)
Is check result OK?
YES Go to Step 3.
NO Repair or replace the defective wire harness.
Step 3
HO2 sensor heater check
1) Measure the resistance between terminals.
NOTE:
* Temperature of the HO2 sensor affects resistance value
largely.
* Make sure that the HO2 sensor heater is in atmospheric tem-
perature.
 09900-25008: Multi circuit tester set
 Tester knob indication: Resistance ()
 HO2 sensor heater resistance:
Is check result OK?
YES Go to Step 4.
Replace the HO2 sensor with a new one.
NO
(4-93)
6.7 – 9.5  at 23 °C (73 °F) (W – W)
2
3
V