FI SYSTEM/ CVT SYSTEM 6-43
2
2
3
No
Ye s
Replace the HO2 sensor with
a new one.
No
Ye s
Replace the HO2 sensor with
a new one.
3
Turn the ignition switch OFF.
Disconnect the HO2 sensor coupler.
Check the resistance between the terminals (White –
White) of the HO2 sensor.
Check the fuel supply system,
if the system is OK, replace
the ECM with a new one, and
inspect it again.
Turn the ignition switch OFF.
Turn the ignition switch ON and measure the heater
voltage between Orange/White wire (ECM side) and
ground.
If the tester voltage indicates the battery voltage for few
seconds, it is good condition.
NOTE:
* Temperature of the sensor affects resistance value
largely.
* Make sure that the sensor heater is at correct tempera-
ture.
z
09900-25008: Multi circuit tester set
t
Tester knob indication: Resistance (Ω)
;
HO2 heater resistance: 4 – 5 Ω (at 23 ˚C/73.4 ˚F)
(White – White)
;
Heater voltage: Battery voltage
(O/W – Ground)
NOTE:
Battery voltage can be detected only during few seconds
after ignition switch is turned ON.
z
09900-25008: Multi circuit tester
u
Tester knob indication: Voltage (
-
)
Black, Gray or White wire open or shorted to ground, or poor
G
,
\
,
e
or
n
connection.
If wire and connection are OK, intermittent trouble or faulty
ECM.
Recheck each terminal and wire harness for open circuit
and poor connection.
Ground
Ground
ECM couplers
n
G
\
e
Ω
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