Circuit/System Description

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

The tire pressure monitor (TPM) system has a radio frequency (RF) transmitting pressure sensor in each wheel/tire assembly. As vehicle speed increases, centrifugal force closes the sensor internal roll switch, which puts the sensor into rolling mode. The sensor signals are received by the tire pressure receivers mounted near each wheel. Each receiver has a 5-volt reference circuit, a low reference circuit, and signal circuit connected to the tire pressure module. The tire pressure module transmits the individual sensor signals to the remote control door lock receiver (RCDLR) which translates the data contained in the tire pressure sensor RF transmissions into sensor presence, sensor mode, and tire pressure. Once vehicle speed is 40 km/h (25 mph) or greater, the RCDLR waits for the sensors to go into rolling mode. If one or more sensors do not go into rolling mode, or do not transmit at all, the RCDLR will set DTC C0750, C0755, C0760, or C0765 respectively.