Temperature Sensors

There are 2 temperature sensors used on this system. The Manifold Air Temperature (MAT) sensor, mounted in the intake manifold, measures the temperature of incoming air/fuel mixture. The other, the Coolant Temperature Sensor (CTS), located on the left side of the cylinder block just below the exhaust manifold, measures temperature of engine coolant.

Information provided by these 2 sensors to the ECU allows the ECU to demand slightly richer air/fuel mixtures and higher idle speeds during cold engine operation.