Honda 2009 GOLDWING GL1800 Owner's Manual page 256

Tire Pressure Monitoring System
(TPMS) Explanation
Your vehicle has also been equipped with a TPMS indicator to indicate
when the system is not operating properly. The TPMS indicator displays the
symbol ''TPMS'' when illuminated.
When the TPMS indicator is illuminated, the system may not be able to
detect or signal low tire pressure as intended.
TPMS malfunctions may occur for a variety of reasons, including the
installation of replacement or alternate tires or wheels on the vehicle that
prevent the TPMS from functioning properly.
Always check the TPMS indicator after replacing one or more tires or
wheels on your vehicle to ensure that the replacement or alternate tires and
wheels allow the TPMS to continue to function properly.
TPMS indicator
250
Technical Information