Mitsubishi Stealth 1994 Import Service Manual page 571

MULTIPORT FUEL IINJECTION -
On-Vehicle Inspection of MFI Components
SENSOR INSPECTION
connect the special tool, Test Harness, to the heated
oxygen sensor connector.
(2) Check that there is continuity [approx. 20 0 at 20°C (68"F)l
across terminals @ and @ of the heated oxygen sensor
connector.
(3) If there is no continuity, replace the heated oxygen sensor.
(4) Warm up the engine until the engine coolant temperature
becomes 80°C (176°F) or higher.
(5) Using jumper wires, connect terminals 0 (red clip of the
special tool) and @ (blue clip) of the heated oxygen sensor
connector to battery 0 and 0 terminals respectively.
Caution
Ensure that the jumper wires are connected correctly,
as wrong connections result in a broken heated oxygen
sensor.
(6) Connect a digital voltmeter across terminals @ (black clip of
the special tool) and @ (white clip).
(7) Race the engine repeatedly and measure the output voltage
of the heated oxygen sensor.
Heated oxygen
Engine sensor output
voltage
When engine
is raced
(8) If the measurements are not as specified, defective heated
oxygen sensor is suspected.
INSTALLATION
(1) For removal and installation of heated oxygen sensor, refer
to GROUP 11 - Exhaust Manifold.
(2) Tighten the heated oxygen sensor to specified torque.
Remarks
When the air-fuel mixture
becomes richer as a result
of repeated racing, the
heated oxygen sensor shoul
output a voltage of
1.0 V.