Tercel Sedan 4-Door L4-1456cc 1.5L SOHC (3E) (1994)
EGR Temperature Sensor: Description and Operation
EGR Gas Temperature Sensor
PURPOSE
The Exhaust Gas Recirculation (EGR) temperature sensor is used for on-board monitoring of EGR function.
OPERATION
EGR operation is controlled by the Electronic Control Module (ECM. By measuring the intake manifold side of the EGR passage, the ECM is
able to determine whether the EGR is actually opening when the EGR VSV is energized. If proper EGR operation is not detected, the ECM
illuminates the Malfunction Indicator Light (MIL) and sets a trouble code.