Fuel Gauge Sender Unit Inspection [2WD]

1. Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION .)
2. Remove the rear seat cushion. (See REAR SEAT CUSHION REMOVAL/INSTALLATION .)
3. Remove the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION .)
4. Verify that the resistance at fuel pump unit terminals D and C is as follows according to the height of the float.

Resistance when float is in the highest position 

• 18.5-21.5 ohms

Resistance when float is in the lowest position 

• 197-203 ohms

Fig 1: Checking Resistance At Fuel Pump Unit Terminals D And C

Courtesy of MAZDA MOTORS CORP.

• If the resistance is not within the specification, replace the fuel gauge sender unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION .)