8-26
–
+
ELEC
E
FUEL CONTROL SYSTEM
(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/W
a
b
1
2
1
Gy
B/W
a
b
1
2
1
8405
CHECKING THE ATMOSPHERIC
PRESSURE SENSOR
8
Measure:
• Atmospheric pressure sensor output
voltage
Out of specification
→
Replace.
Atmospheric pressure sensor
output voltage
Pink (P) – Black (B)
3.2 - 4.6 V
