Mitsubishi 3000GT Service Manual page 239

EGR TEMPERATURE SENSOR <California>
output
voltage
Temperature
OPERATION
The EGR temperature sensor converts the temperature of EGR gas downstream from the EGR valve
l
to voltage and inputs it to the engine control module. The engine control module judges the condition
of the EGR by this signal. If there is abnormal condition, the check engine/malfunction indicator lamp
is turned on to notify the driver.
Five volt power supply in the engine control module is applied to the EGR temperature sensor through
l
the resistance in the module. This power supply further passes through the EGR temperature sensor,
which is a kind of resistor, and is grounded at the engine control module. The resistance of the
EGR temperature sensor is characterized by a decrease in resistance with an increase of EGR tempera-
ture due to increase in quantity of EGR.
EGR temperature sensor terminal voltage increases or decreases with EGR temperature sensor resis-
l
tance. 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.
MULTIPORT On-Vehicle Inspection of MFI
FUEL INJECTION - Components
A Equipment side
connector
Engine
control
module
TSB
Revision
EGR temperature sensor
I
I
72
5v
A Harness side
connector