Diagnostic Aids
WARNING: This page is about a different car, the 2000 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
If an open in the serial data line to receiver exists, IPC will display XXX kPa (XX psi) for all tire pressure values and SERVICE TIRE WARN SYS message will be displayed on DIC. Take tire pressure measurements when tires are cold to obtain lowest readings.