Fuel Gauge Sending Unit

CAUTION: When working with fuel-injected models, be careful when removing fuel gauge sending unit. Relieve fuel pressure before removing sending unit. Fuel could spray from tank.

Disconnect fuel gauge sending unit connector. Connect ohmmeter between terminal "B" and body of sending unit. See Fig 1 for appropriate terminal locations.
Move float to various positions indicated and check resistance readings against SENDING UNIT RESISTANCE SPECIFICATIONS table. If resistance is not as specified, replace fuel gauge sending unit.

Fig 1: Locating Fuel Gauge Sending Unit Connector Test Terminals

Courtesy of MAZDA MOTORS CORP.

SENDING UNIT RESISTANCE SPECS⁽¹⁾

Application & Float Position

Resistance Range (Ohms)

MX-6 & 626 Except 4WS

Fully Raised

1-5

Mid-Range

29-37

Fully Lowered

103-117

MX-6 & 626 With 4WS

Fully Raised

0-2.5

Mid-Range

15-23

Fully Lowered

50-60

⁽¹⁾	Resistance readings and float positions are approximations.