C44" H02 Sensor (H02S) Circuit Malfunction (E.02. 19) - Suzuki DL650 Service Manual

FI SYSTEM DIAGNOSIS 4-47
"C44" H 0 2 SENSOR (H02S) CIRCUIT MALFUNCTION (E-02,19)
INSPECTION
Step 1
1) Lift and support the fuel tank. (-5-7)
2) Turn the ignition switch OFF.
3) Check the H02 sensor coupler for loose or poor contacts.
--
DETECTED CONDITION
The sensor voltage should be the following and less
after warming up condition.
(Sensor Voltage
5
0.4 V)
4) Insert the needle pointed probes to the H02 sensor coupler.
5) Turn the ignition switch ON and measure the heater voltage
between ONV wire (ECM side) and ground.
6) If the tester voltage indicates the battery voltage for few sec-
onds, it is good condition.
POSSIBLE CAUSE
H02 sensor or its circuit open or short.
Fuel system malfunction.
ECM malfunction.
Heater voltage: Battery voltage ( O M
-
Ground)
NOTE:
Battery voltage can be detected only during few seconds after
ignition switch is turned ON.
@
09900-25008: Multi circuit tester set
09900-25009: Needle pointed probe set
I & #
Tester knob indication: Voltage (--)
Is the voltage OK?
1
YES
/
GO
to Step 2
I
I
NO
1
Replace the H02 sensor with a new one.
1