Suzuki AN650 2002 Service Manual page 204

2
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.
;
Heater voltage: Battery voltage
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 (
Yes
3 Turn the ignition switch OFF.
Disconnect the HO2 sensor coupler.
Check the resistance between the terminals (White –
White) of the HO2 sensor.
;
HO2 heater resistance: 4 – 5 Ω (at 23 ˚C/73.4 ˚F)
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)
Yes
Black, Gray or White wire open or shorted to ground, or poor
G \ e n
, , or connection.
If wire and connection are OK, intermittent trouble or faulty
ECM.
Recheck each terminal and wire harness for open circuit
and poor connection.
(O/W – Ground)
-
)
No
Replace the HO2 sensor with
a new one.
(White – White)
No
Replace the HO2 sensor with
a new one.
Check the fuel supply system,
if the system is OK, replace
the ECM with a new one, and
inspect it again.
FI SYSTEM/ CVT SYSTEM 6-43
2
Ground Ground Ground
3
G
ECM couplers
Ω
\
e
n