DESCRIPTION

BASE TIRE PRESSURE MONITORING

This system will consist of Tire Pressure Monitoring (TPM) sensors attached to each wheel through the valve stem mounting hole, a Wireless Control Module (WCM) and a yellow TPM telltale lamp. A TPM sensor shall be installed in the spare wheel if the vehicle is equipped with a matching full size spare wheel and tire assembly.

PREMIUM TIRE PRESSURE MONITORING

The system will consist of tire pressure monitoring sensors attached to each wheel through the valve stem mounting hole, a wireless control module (WCM), three wheel sensor transponders located in three of the four wheel wells, a re-configurable dot matrix display module (CCN), and a yellow telltale.

A sensor shall be installed in the spare wheel if the vehicle is equipped with a matching full size spare wheel and tire assembly.

NOTE: On vehicles equipped with a Tire Pressure Monitoring System (TPMS), when the spare tire pressure sensor is replaced with a new pressure sensor, a diagnostic scan tool MUST be used to run a routine that will program the new pressure sensor ID into the Wireless Control Module (WCM), commonly referred to as the Sentry Key Remote Entry Module (SKREEM). Please copy the ID number off of the new pressure sensor before installing it into the spare tire. Then follow the programming steps outlined in the diagnostic scan tool for: “Learn Spare Tire Sensor ID” under” Miscellaneous Functions” for the “WCM/Wireless Control Module” menu item as appropriate.

NOTE: If replacing the WCM, the spare tire must be dismounted from its wheel to access and note the spare tire pressure sensor ID. Then follow the programming steps outlined in the diagnostic scan tool for “Learn Spare Tire Sensor ID” under “Miscellaneous Functions” for the “WCM/Wireless Control Module”? menu item as appropriate. In addition, the placard pressure thresholds must be updated in the new WCM. Go to "Update Pressure Thresholds" under "Miscellaneous Functions" for the "WCM Wireless Control Module" and follow the procedure.

WIRELESS CONTROL MODULE (WCM)

The receiver circuit for the TPM system is integrated into the WCM. The WCM also includes the Remote Keyless Entry (RKE) receiver and the Sentry Key Immobilizer (SKIM) receiver. All three receivers share a number of common components. The WCM decodes the RF signals transmitted by each of the vehicle's tire pressure sensors. The decoded information is used to determine if "warning" or "fault" conditions exist within the TPM system.

The WCM communicates with the module that controls the "TPM telltale lamp", via the vehicle bus system.

Upon detection of a warning or fault condition, the WCM will send a request to illuminate or flash the yellow TPM telltale. Also, upon detection of a warning or fault condition, the display module will send a request to sound the "chime". A chime will only be requested once per ignition cycle per warning or fault condition detected.

The WCM will store all warning and fault conditions, placard pressure values, low-pressure threshold values and low pressure threshold hysterisis values in memory that can be accessed through diagnostic communication. If new sensors are introduced to the vehicle, the data stored for the sensor being replaced will be deleted.

The WCM will store all wheel sensor ID's and locations and faults in memory that can be accessed through diagnostic communication. All other data values transmitted from each active wheel sensor (not the spare tire) shall be stored in the WCM memory.

The WCM automatically learns and stores the sensor's ID while driving “within 10 minutes continuously above 15 m.p.h. (24 Km/h)” after a sensor has been replaced.

The learning sequence will initiate when the vehicle has been stopped for more then 20 minutes.