Sprinter 2500 L5-2.7L DSL Turbo (2003)
Intake Air Temperature (IAT) Sensor: Description and Operation
The inlet air temperature sensor is located between the charge air pipe and the charge air distribution of the cylinders. The inlet air temperature sensor
measures the temperature of the air as it is supplied to the cylinders and transmits the value to the ECM. This is required in order to determine the density
of the air being supplied for the combustion process. The value range is from minus 40° F up to 302° F (minus 40° C to 150° C).
Inlet Air Temperature Sensor
The Negative Temperature Coefficient (NTC) resister located within the inlet air temperature sensor alters it's resistance in line with the charge air
temperature. If the engine is cold, the value equals ambient temperature. For a temperature of 68° F (20° C) the resistance is approximately 6000 ohms.
For a temperature of 104° F (40° C) the resistance is approximately 2600 ohms.
