Test E: Tire Pressure Monitoring System (TPMS) Indicator ON Continuously and Message Center (if equipped) Displays LOW TIRE PRE

Pinpoint Test E: Tire Pressure Monitoring System (TPMS) Indicator ON Continuously and Message Center (if equipped) Displays LOW TIRE PRESSURE

NOTE: If the vehicle security module (VSM) is not configured and all tire pressure sensors are not trained after installing a new VSM, the VSM tire pressure PIDs will display default tire pressure information that does not reflect actual tire pressure.

Normal Operation
The tire pressure monitoring system (TPMS) monitors the air pressure of all 4 road tires. The wheel-mounted tire pressure sensors transmit via radio frequency signals, to the VSM. TPMS functionality is integral to the VSM. These transmissions are sent approximately every 60 seconds when the vehicle speed exceeds 32 km/h (20 mph). The TPMS function (integral to the VSM) compares each tire pressure sensor transmission against a low-pressure limit. If it has been determined that the tire pressure has fallen below this limit, the VSM communicates this on the vehicle communication bus to the instrument cluster. The instrument cluster then illuminates the TPMS indicator and displays the appropriate message(s) in the message center (if equipped).

This pinpoint test is intended to diagnose the following:
^ Low air pressure in tire(s)
^ Tire pressure sensor(s)

E1:

E2: