Suzuki GW250 Service Manual page 217

4-76 FI SYSTEM DIAGNOSIS
P0130 for HO2 sensor (Use of SDS)
Step 1
HO2 sensor circuit check
1) Turn the ignition switch OFF.
2) Remove the seat. (8-5)
3) Disconnect the HO2 sensor coupler 1 (4-93) and ECM
couplers 2.
4) Check for proper terminal connection to the HO2 sensor cou-
pler and the ECM couplers.
5) If connections are OK, check the following points.
• Resistance
 09900-25008: Multi circuit tester set
09900-25009: Needle-point probe set
 Tester knob indication: Resistance ()
– Between B wire and B/Br wire of HO2 sensor coupler and
ECM coupler: less than 1 
– Between B and B/Br wire and ground: infinity
– Between B wire terminal and other terminal at HO2 sensor
coupler: infinity
1
1
1
1
1