FUEL
V A L V E >
Inspection of
Components
EGR TEMPERATURE SENSOR
connector
Component side
Harness side
connector
Temperature
OPERATION
l
The
temperature sensor functions to con-
vert the data regarding the temperature of the
EGR gas downstream from the EGR valve to
voltage, and to input that voltage (as signals) to
the engine control module.
l
The
power supply within the engine control
module is supplied, by way of the resistance
within the unit, to the EGR temperature sensor;
it passes through the
temperature sensor,
which is a type of resistor, and is grounded at
the engine control module.
Note that the resistance of the EGR temperature
sensor decreases when the
gas volume
increases and the temperature of the EGR gas
increases.
l
The
temperature sensor terminal voltage
becomes higher when the resistance of the
EGR
temperature sensor increases, and becomes
lower when the resistance decreases.
Consequently, the EGR temperature sensor
terminal voltage varies in accordance with the
temperature of the
gas, becoming lower
when the temperature of the EGR gas in-
creases.
TSB Revision
Summary of Contents for 1989 Galant
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