Temperature Gauge: Description and Operation

How the Circuit Works

The indicator lights are controlled by different conditions in their associated systems. Refer to each associated system to see its entire schematic.

Engine Coolant Temperature Gauge
The engine coolant temperature gauge has two intersecting coils wound around a permanent magnet rotor. Voltage applied to the coils, through fuse 9, generates a magnetic field. The magnetic field, controlled by the PCM, causes the rotor to rotate and the gauge needle to move. As the PCM varies the current, current through the gauge coils changes, moving the gauge needle toward the coil with the strongest magnetic field.