Tire Pressure Monitor Indicator: Description
A Tire Pressure Monitor (TPM) indicator is standard equipment on all instrument clusters. See Fig 1. However, on vehicles not equipped with the optional TPM, this indicator is electronically disabled. This indicator is located above the coolant temperature gauge and to the right of the tachometer in the instrument cluster.
The TPM indicator consists of a stencil-like cutout of an icon that represents a cross-section of a tire with a centered exclamation point in the opaque layer of the instrument cluster overlay. The dark outer layer of the overlay prevents the indicator from being clearly visible when it is not illuminated. An amber Light Emitting Diode (LED) behind the cutout in the opaque layer of the overlay causes the icon to appear in amber through the translucent outer layer of the overlay when the indicator is illuminated from behind by the LED, which is soldered onto the instrument cluster electronic circuit board. The TPM indicator is serviced as a unit with the instrument cluster.