Circuit/System Description

The auxiliary gauge module displays the transmission fluid temperature based on the information either from the engine control module (ECM) or the transmission control module (TCM). The ECM or the TCM converts the data from the transmission oil temperature sensor to a transmission fluid temperature signal. The ECM or the TCM sends the transmission oil temperature signal via serial data to the body control module (BCM). The BCM then sends the information via serial data to the Auxiliary Gauge Module to display the transmission fluid temperature.