Mitsubishi 3000GT 1991 Service Manual page 203

FUEL SYSTEM
TSB Revision
SENSOR INSPECTION
(2) Check that there is continuity [approx. 20 IR at 20°C (68"F)j
across terminals @and @of the oxygen sensor connector.
(3) If there is no continuity, replace the 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 @ and @ of the
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 oxygen sensor.
(6) Connect a digital voltmeter across terminals @ and 0.
(7) Racing the engine repeatedly and measure the output
voltage of the oxygen sensor.
Engine Oxygen sensor
output voltage
NOTE
For removal and installation of the oxygen sensor, refer to
GROUP 15 - Exhaust Manifold.
Remarks