Fuel gauge
2. Access the fuel gauge by removing the rear seat and inspection cover. Disconnect the electrical wiring connector.
3. Connect a resistor of known value between 8 and 96 ohms. between connector «Y» connector and ground (car metal). Make sure no other wires are shorted to ground, then turn on the ignition.
4. Allow the meter to stabilize for two minutes, then compare the expected measurement with the actual measurement.
5. Repeat the test, if possible, with other resistor values within the stated range. Switch off the ignition before replacing the resistors.
6. If the meter shows "full" or "empty" regardless of the value of the resistor, the wiring to the meter may be short-circuited or broken, respectively. In other words, inaccurate data due to damage in the meter.
Checking the fuel gauge | Fuel gauge readings at various resistances |
Analog fuel gauge readings for various resistances
Fuel gauge sensor
7. Remove the mounting screws and remove the sensor.
Warning: Take appropriate precautions against spontaneous combustion and vapor intoxication. Remove the sensor from the vehicle.
Removing the fuel level sensor
8. Attach a multimeter, set the measured resistance to the sensor clamps. Move the float up and down, compare the resistance in different positions with the values.
Fuel gauge sensor resistance values
9. If the resistance does not change as specified, the sensor must be replaced. Finally, install the sensor.
Temperature gauge
10. Disconnect the electrical connector from the temperature gauge sensor (located behind the thermostat housing).
11. Connect a resistor of known value and within the limits shown in the figure between the sensor connector and ground.
12. Make sure the wires are not shorted to ground, then turn on the ignition. Allow the meter to stabilize for two minutes, then compare the expected reading with the actual reading. Repeat if possible with other resistors.
Electronic temperature gauge data for various resistances
13. If the meter shows a maximum or minimum, regardless of the value of the resistor, then the wiring is short-circuited or broken.
Temperature Gauge Analog Data for Different Resistances - Tachometer Models | Temperature gauge analog data for various resistances - models without tachometer |
Temperature gauge sensor
14. Drain the liquid from the cooling system below the level of the sensor. Unscrew the sensor and remove it.
15. Hold the sensor over the water pan so that the bulb is submerged. Attach a multimeter, set the resistance measurement to the case and block clamp. Heat the water to 80°C: the resistance at this temperature should be 53.5±4.2 ohms.
Temperature Gauge Sensor Test
16. If the resistance is out of range, replace the sensor.
17. Install the sensor and fill the cooling system.