Suzuki GW250 Service Manual page 221

4-80 FI SYSTEM DIAGNOSIS
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?
Replace the ECM with a known good one, and
YES
inspect it again.
Replace the HO2 sensor with a new one.
NO
(4-93)
6.7 – 9.5  at 23 °C (73 °F) (W – W)
3