Tire pressure system (Chevrolet Tahoe 2)

The Tire Pressure System (TPM) alerts the driver when a significant loss of air pressure is detected in any of the four tires. The system uses a passenger door control unit (PDM), an on-board electrical equipment control unit (AFM), a driver information display (DIC), an instrument panel (IPC), and pressure sensors with a radio frequency (RF) transmitter on each wheel. When the vehicle speed is less than 30 km/h, the sensors give a signal for 60 minutes, which minimizes the battery consumption in the sensor. At speeds above 30 km/h, the signal is sent every 60 seconds. When the system detects a significant loss of tire pressure, the driver information display shows the message CHECK TIRE PRESSURE (check tire pressure) and the warning indicator lights up. The system does not display the pressure in the individual tire, but records the fault codes in the PDM unit memory (C0750, C0755, C0760 or C0765 - pressure sensor fault codes, C0775 - sensor information failure code).

After replacing the PDM/door switch, the PDM unit must be programmed for proper operation of the tire pressure monitoring system. In spare parts, the PDM unit is supplied with the option to disable tire pressure monitoring in order to use the unit on models with and without this system. Once the pressure tracking system option is enabled, you will not be able to disable it, so before enabling the option, make sure that this vehicle model is equipped with a tire pressure tracking system. After installing the new PDM unit, enter the identification codes of the pressure sensors in its memory. The same should be done when replacing the pressure sensor or after rotating the wheels.

The codes are entered in order: left front, right front, right rear, and left rear. Since entering the codes requires special equipment, it is best to do this procedure at a service station.

[The article is based on data from the website «chevyman.ru»]