3000GT V6-2972cc 3.0L DOHC (1993)
Turbo Boost Gauge: Description and Operation
Boost Meter Circuit
Boost pressure is calculated by the ECM based on input signals from the airflow meter, intake air temperature sensor and the barometric pressure
sensor.
When the ECM determines that boost pressure is present, a pulsed ground signal is given to the boost meter circuit and the gauge (located in the
center dash gauge cluster) responds in relation to the boost pressure.