8-23
–
+
ELEC
E
Measuring steps
WARNING
To prevent an explosion when performing
this procedure, keep all flammable prod-
ucts (e.g., gasoline) away from the testing
area and make sure there is proper ventila-
tion.
CAUTION:
Do not let any silicon anticorrosion solvent
touch the oxygen density sensor or its
accuracy will be affected.
(1) Remove the oxygen density sensor.
Refer to “OXYGEN DENSITY SEN-
SOR” on page 5-25.
(2) Remove any oil from the oxygen den-
sity sensor with acetone or a similar
solvent and allow the sensor to thor-
oughly dry.
(3) Heat the front end of the oxygen den-
sity sensor
1
with a gas torch
2
(in
the center of its blue flame
a
) for 10 -
15 seconds. Then, remove the oxygen
density sensor from the flame and
check the voltage change and time.
CAUTION:
• Do not heat the oxygen density sensor
above 800 ˚C (1,472 ˚F) or continuously for
more than 1 minute at a time or the sen-
sor will be damaged.
• Do not use a burner with an oxygen tank.
The sensor may be damaged by a flame
of high temperature.
a
Inner cone
b
Outer cone
NOTE:
If the instantaneous change in the output
voltage is 0.6 V or greater the oxygen den-
sity sensor is OK.
Gy
B
a
b
1
2
1
8405
FUEL CONTROL SYSTEM
