Suzuki TU250X, Руководство по обслуживанию, Страница: 185 / 370

4-64 FI SYSTEM DIAGNOSIS
“44” (P0130) HO2 SENSOR (HO2S) CIRCUIT MALFUNCTION

INSPECTION
NOTE:
After repairing the trouble, clear the DTC using SDS tool.
(

4-24)
Step 1
1) Turn the ignition switch OFF.
2) Remove the right frame cover. (

8-3)
3) Check the HO2 sensor coupler 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/W wire
A
and ground.
6) Also, check the continuity between Bl/W wire
A
and B/Br
wire
B
. 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
HO2 sensor output voltage is not input to ECM dur-
ing engine operation and running condition.
• HO2 sensor circuit open or short
• ECM malfunction
• HO2 sensor malfunction
ECM
O/W
W B Gr W
HO2
E1
E2
B/Br
Bl/W
B/W
HO2 sensor
Ignition switch
Side-stand
relay Engine stop
switch
To side-stand
switch
When using the multi circuit tester, do not strongly touch the terminal of the ECM coupler with
a needle-point probe to prevent the terminal damage or terminal bend.
1
1
!