Fuel Gauge Sending Unit Test

WARNING: Relieve fuel pressure before servicing fuel system.

Remove fuel gauge sending unit. See Figure . Connect ohmmeter between fuel gauge sending unit connector terminals "A" and "D".
Measure resistance with fuel gauge sending unit float in specified position. See FUEL GAUGE SENDING UNIT RESISTANCE table. If resistance is not as specified, replace fuel gauge sending unit.

Fig 1: Identifying Fuel Pump Sending Unit Connector Terminals & Positions

Courtesy of MAZDA MOTORS CORP.

FUEL GAUGE SENDING UNIT RESISTANCE ⁽¹⁾

Float Position

Ohms

Fully Raised (Full)

2.4-6.4

Mid-Range

52-58

Fully Lowered (Empty)

103-107

⁽¹⁾	Resistance values and float positions are approximate.