4-60 FI SYSTEM DIAGNOSIS
“44” (P0130) HO2 SENSOR (HO2S) CIRCUIT MALFUNCTION
INSPECTION
Step 1
1) Turn the ignition switch OFF.
2) Remove the right side leg shield. (#8-8)
3) Check the HO2 sensor coupler
1 for loose or poor contacts.
If OK, then check the HO2 sensor lead wire continuity.
4) Disconnect the HO2 sensor coupler
5) Check the continuity between Bl wire (harness side) and
ground.
6) Also, check the continuity between Bl wire (harness side) and
B wire (harness side). If the sound is not heard from the
tester, the circuit condition is OK.
! 09900-25008: Multi-circuit tester set
) Tester knob indication: Continuity test (()
DETECTED CONDITION POSSIBLE CAUSE
44
(P0130)
HO2 sensor output voltage is not input
to ECM during engine operation and
running condition.
• HO2 sensor circuit open or shorted to ground.
• Fuel system malfunction.
• ECM malfunction.
ECM
Side-stand
relay
Ignition
switch
Engine stop
switch
O/W
B
W
Bl
B
B
Bl
B/W
HO2 sensor
E
OX
7
E1
J
E2
To side-stand
switch
1
1
]
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