Fault Isolation

There are four conditions that will cause a Tire Pressure Monitoring System fault to be set. All fault codes are associated with a specific wheel location.

If the EVIC detects a non-transmitting sensor/transmitter in a road wheel for 10 minutes at a vehicle speed more than 25 MPH (40 KMH), it will: store an active fault code, request a chime, display SERVICE TIRE PRESS SYSTEM and display a dashed line at the wheel location on the graphic display if the display is activated.

When the EVIC detects a low pressure sensor/transmitter battery status for 7 consecutive ignition cycles, or any sensor transmitting at a shorter than expected interval, or no valid pressure sensor ID from the spare tire for 20 consecutive ignition cycles spaced at least one hour apart, it will: store an active fault code, request a chime and display SERVICE TIRE PRESS SYSTEM.

Use the DRBIII(R) Input/Output function to further isolate the specific concern. The DRBIII(R) can be queried to determine the Sensor/Transmitter status:

• INVALID PRESSURE -  The Sensor/Transmitter is reporting a negative pressure or a pressure more than 63 psi (434 kPa).
• LOW BATT -  The Sensor/Transmitter has reported a low battery status for seven consecutive ignition cycles.
• TRAINED -  The Sensor/Transmitter ID code is recognized by the EVIC.
• ACTIVE -  The vehicle is moving at 25 MPH (40 KMH) and the Sensor/Transmitter is "awake" and transmitting as expected by the EVIC.