Celica Coupe L4-107.5 1762cc 1.8L DOHC (7A-FE) (1995)
EGR Gas Temperature Sensor: Description and Operation
PURPOSE
The EGR gas temperature sensor is used for on-board monitoring of EGR function.
OPERATION
EGR operation is controlled by the engine 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.