C44" (P0156/P0161) Or "C64" (P0130/P0135) Ho2 Sensor (Ho2S) Circuit Malfunction (For E-02, 19, 24) - Suzuki VZR1800 2007 Service Manual

"C44" (P0156/P0161) or "C64" (P0130/P0135) HO2 SENSOR (HO2S)
CIRCUIT MALFUNCTION (FOR E-02, 19, 24)
DETECTED CONDITION
C44/C64 HO2 sensor output voltage is not input
(P0156/ to ECM during engine operation and
P0130) running condition.
(Sensor voltage < 0.45 V)
C44/C64 The heater can not operate so that
(P0161/ heater operation voltage is not supply to
P0135) the oxygen heater circuit.
Ignition
switch
INSPECTION
Step 1
(When indicating C44/P0156 for HO2 sensor #2)
(When indicating C64/P0130 for HO2 sensor #1)
1) Turn the ignition switch OFF.
2) Check the HO2 sensor for loose or poor contacts.
If OK, then check the HO2 sensor lead wire continuity.
3) Disconnect the HO2 sensor coupler.
4) Check the continuity between W/G (#1) or W/Bl (#2) wire A
and ground.
5) Also, check the continuity between W/G (#1) or W/Bl (#2)
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 (()
Side-stand Engine stop
relay switch
O/B
To GP
switch
HO2 sensor #1
POSSIBLE CAUSE
• HO2 sensor circuit open or shorted to ground.
• Fuel system malfunction.
• ECM malfunction.
• Battery voltage supply to the HO2 sensor.
HO2 sensor #2
(Rear) (Front)
1
#1
1
FI SYSTEM DIAGNOSIS
ECM
HO2S. R
W/G
W/Bl HO2S. F
B/Br
E2
W/B
HO2. H
1
#2
]
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