RAM 3500 HD Truck 2WD L6-6.7L DSL Turbo (2008)
EGR Temperature Sensor: Description and Operation
Operation-Cab/Chassis Models
OPERATION-CAB/CHASSIS MODELS
The EGR Temperature Sensor (1) is located on the EGR crossover tube (6) near the EGR valve.
The EGR temperature sensor is a negative temperature coefficient thermistor used to measure the temperature of the EGR gas flow after it exits the EGR
cooler.
The ECM (Engine Control Module) supplies 5-volts to the EGR temperature signal circuit. To determine the temperature of the EGR gas flow, the ECM
monitors the change in voltage caused by changes in the resistance of the sensor. The ECM uses the exhaust gas recirculation temperature value for the
engine protection system, and also for engine emissions control.
