Fuel Gauge Sender Unit Inspection

WARNING: This page is about a different car, the 2003 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

Move the float to the topmost and bottom most positions, and verify that the resistance between terminals A and B of the unit and the position of the float are as indicated in the figure.
- If they are not as indicated, replace the fuel gauge sender unit.
Fig 1: Checking Fuel Gauge Sender
Courtesy of MAZDA MOTORS CORP.