Diesel Data: Automotive Repair

Transmission Fluid Life Information

The powertrain control module (PCM) provides the transmission fluid life data to the instrument cluster through the universal asynchronous receiving/transmitting (UART) serial data line. The instrument cluster transmits the data to the driver information center (DIC) on the UART B serial data line. The DIC displays the transmission fluid life when the ENG/5 button is toggled.