Fuel Gauge Sender: Testing and Inspection

FUEL GAUGE UNIT CHECK
To check, remove the fuel gauge unit from the fuel tank.

FUEL GAUGE UNIT FLOAT HEIGHT
Move the float and measure the height A at point F (highest) and B at point E (lowest) with float arm touching stopper.
Standard value:

A: 26.6 mm (1.05 in.)
B: 159.9 mm (6.3 in.)

A: 10.4 mm (0.41 ± 0.12 in.)
B: 119.5 mm (4.7 ± 0.12 in.)

A: 3.0 ± 3 mm (0.12 ± 0.12 in.)
B: 126.7 ± 3 mm (5.0 ± 0.12 in.)

FUEL GAUGE UNIT RESISTANCE
1. Check that resistance value between the fuel gauge terminal and ground terminal is at standard value when the fuel gauge unit float is at point F (highest) and point E (lowest).
Standard value:

POINT F: 4 ± 2 Ohms
POINT E: 112 ± 7 Ohms

POINT F: 2 ± 1 Ohms
POINT E: 56.9 ± 1 Ohms

POINT F: 2 ± 1 Ohms
POINT E: 50.1 ± 1 Ohms
2. Check that resistance value changes smoothly when the float moves slowly between point F (highest) and point E (lowest.)
3. If all checks are correct, proceed to fuel gauge unit float height check. If any check is not correct, replace the fuel gauge unit.

THERMISTOR
1. Connect fuel gauge unit to battery via test light (12V - 3.4W). Immerse it in water.
2. The condition is good if light goes off when thermistor is in water and lights when it is removed from water.
3. If all checks are correct, the fuel gauge unit is OK. If any check is not correct, replace the fuel gauge unit.

CAUTION: Dry the unit, or water will get into the fuel tank.

LEVEL SWITCH
1. Connect fuel gauge unit to battery via test light (12V - 3.4W). Immerse it in water.
2. The condition is good if light goes off when level switch is in water and lights when it is removed from water.

CAUTION: Dry the unit, or water will get into the fuel tank.

3. If all checks are correct, the fuel gauge unit is OK.
If any check is not correct, replace the fuel gauge unit.