Mitsubishi 3000GT 1991 Service Manual page 198

FUEL SYSTEM
EGR TEMPERATURE SENSOR <California>
EGR tem0erature senso
Temperature
OPERATION
The EGR temperature sensor converts the temperature of EGR gas downstream from the EGR valve to
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voltage and inputs it to the engine control unit. The engine control unit judges the condition of the EGR by
this signal. If there is abnormal condition, the engine warning light is turned on to notify the driver.
Five volt power supply in the engine control unit is applied to the EGR temperature sensor through the
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resistance in the unit. This power supply further passes through the EGR temperature sensor, which is a
kind of a resistor, and is grounded at the engine control unit. The resistance of the EGR temperature
sensor is characterized by a decrease in resistance with an increase of EGR temperature due to increase
in quantity of EGR.
EGR temperature sensor terminal voltage increases or decreases with EGR temperature sensor
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resistance. Therefore, EGR temperature sensor terminal voltage changes with EGR gas temperature. The
higher the EGR gas temperature, the lower the EGR temperature sensor terminal voltage.
control
unit
TSB Revision
connector
1