Mitsubishi 3000GT Service Manual page 358

SENSOR INSPECTION
Refer to P.l3A-143.
INSTALLATION
Refer to P.l3A-143.
HEATED OXYGEN SENSOR <From 1996 models>
Theoretical A/F
Electromotive
OPERATION
The heated oxygen sensor senses the oxygen concentration in exhaust gas, converts it into a voltage
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and inputs it to the engine control module.
The heated oxygen sensor outputs about
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ratio and outputs about 0 V when the ratio is leaner (higher oxygen concentration in exhaust gas).
The engine control module controls the fuel injection ratio based on this signal so that the air-fuel
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ratio may be kept at the theoretical ratio.
The battery voltage is supplied to the heated oxygen sensor through the MFI relay. Therefore, the
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sensor element is heated by the heater so that the heated oxygen sensor remains responsive even
when the exhaust temperature is low.
MULTIPORT
On-Vehicle Inspection of MFI
FUEL INJECTION - Components
Engine control module connector
V when the air-fuel ratio is richer than the theoretical
1
TSB Revision
A B C D
Harness side
connector