Mitsubishi Eclipse Workshop Manual page 151

FUEL
- On-vehicle Inspection
of
MPI
Components
13-83
o
o
I
o
SENSOR INSPECNON
('l)
Disconnect the oxygen sensor connector, and connect the
special
tool
(harness
connectorlto the oxygen sensor side.
(2) Check
that there
is
continuity [approx.
12 O at
20oC
(68'F)l
between oxygen sensor connector terminal @ (red
clip of
special tool) and terminal
@
(blue clipl.
(3) lf there is no
continuity. replace the oxygen
sensor.
(4) Warm up the engine until the engine coolant temperature
exceeds 8O"C (176'F).
(5) Use jumper wires
to
connect oxygen sensor terminal @
(red
clip of
special tool) and terminal
@
{blue
clipl to
the
battery
@terminal
and @terminal.
Caution
Be very careful when
connecting
the iumper
wircc
because
the oxygen sensor
will
be damaged
if
a
mistake
.
is made in the connecting terminals.
(6) Connect
a
digital voltmeter between terminal
O (yellor
clip of special tool) and terminal
@
(black clip).
(7) While repeatedly racing the engine, measure
the
output
voltage
of the oxygen
sensor.
o
o
Ä
o
a
f-\El
l-E--l
Check
for continuity of the
earth
circuit.
.
Oxygen sensor connector:
Disconnected
.
Engine
control unit connector:
Connected
olc
o(
Repair
the
harness.
(@EI-Ets)
Engine
Oxygen sensor
output voltage
Remark
When
racing
engrne
0.6-
1.0v When
the airlfuel
mixture
ratio becomes
rich
by
rep€atedly
racirp the
eqgine,
th6 normal ox!€en
sensor
output is
approximately
0.6-
1.0V.
Q
MStsubirhl MotoE
Corpor.tton
Apr.199f
PWUEgoTO