Transponder - TPM: Description

WARNING: This page is about a different car, the 2006 Dodge Magnum, 2006 Dodge Charger, and 2006 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.

Vehicles equipped with the premium TPM system use transponders, sometimes referred to as trigger modules, to provide the Wireless Control Module (WCM), commonly referred to as the Sentry Key Remote Entry Module (SKREEM), with the location of the tire pressure sensors on the vehicle. A transponder is located in three of the four wheel wells on the vehicle The transponders are located in the left front, right front and right rear wheel wells behind the wheelhouse splash shields. Only three transponders are necessary to locate the four rotating sensors because the WCM can determine the location of the fourth by using the process-of-elimination theory. Once the system knows the location of the first three sensors, it assumes the location of the fourth tire pressure sensor is in the left rear tire.