Trouble Diagnoses: Self-Diagnosis: Function
WARNING: This page is about a different car, the 2005 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.
When the low tire pressure warning system detects low inflation pressure or another unusual symptom, the warning lamp in the combination meter comes on. To start the self-diagnostic results mode, ground the tire pressure warning check terminal. The malfunction location is indicated by the warning lamp flashing and the buzzer sounds.