CONTROL SYSTEM
OXYGEN SENSON
CONNECTOF
OXYGEN SENSOR
Inapectlon ol Termlnal Voltage
1. Warm up the engine to normal operating temperature and
run it at idle.
2. Disconnect the
oxygen
sensor connector.
3. Connect a
voltmeter
between
the
oxygen sensor and a
oround.
4. Measure the voltage while
increasing and
decreasing the
engine speed suddenly several times.
Specitication
".+try'",,'
-\1
@
o
o
5. Replace the oxygen sensor if not as specified.
Inspectlon ot Sensitivity
1. Warm up the engine to normal operating temperature.
2. Connect the SSTS
(System
Selector and Self-Diagnosls
Checker) to the diagnosis connector as shown.
3. Set switch
@
to
position
1.
4. Set TEST SW to Oz MONITOR.
lnspection ot Heatel
1. Measure resistance between terminals
@
and
@.
Realstance: 60
(20"C
l68oFl)
2. Reolace the heater if not as soecified.
MONITOF
5AF-m6|$S6 o€OGR
;O-.
ooo
tl_l
/
1r\
o
r:]
I
5. Increase the engine speed to between 2,000 and 3,000
rpm, and verily
lhat
the monitor
lamp flashes lor
l0 sec..
lf not as specified, replace the oxygen
sensor.
(Refer
to
page
F-124.)
Monltor lamp: Flashea more
than
S
limes/l0
seconds
6. Replace the
oxygen sensor
it not as specified.
Engine
condilron Voltage
M
Below 0.4
Above 0.5
F-123
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