Difference between revisions of "Analog Fuel Sensor"
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==Analog Fuel Sensor Connection== | ==Analog Fuel Sensor Connection== | ||
[[File:Instrument cluster pinout.png|frame|Example of service manual describing insturment cluster | [[File:Instrument cluster pinout.png|frame|Example of service manual describing insturment cluster | ||
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| − | - Easiest way to find fuel sending wire is to consult a car service manual or wiring diagram for the instrument panel. A lot of them can be found online by searching for "<''your'' ''car'' ''model''> ''service'' ''manual''". The exact pin and wire can usually be found without having to test everything. | + | - Easiest way to find fuel sending wire is to consult a car service manual or wiring diagram for the instrument panel. A lot of them can be found online by searching for "<'''your''' '''car''' '''model'''> '''service''' '''manual'''". The exact pin and wire can usually be found without having to test everything. |
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Typically, the fuel sending wire will come from a multiple wire connector along with all the other dashboard inputs. | Typically, the fuel sending wire will come from a multiple wire connector along with all the other dashboard inputs. | ||
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| − | - With no manual, wires coming from the fuel gauge have to be tested by measuring their | + | - With no manual, wires coming from the fuel gauge have to be tested by measuring their current, then reducing the amount of fuel in the fuel tank and then measuring '''current''' again. The wire that has reduced '''current''' in response to less fuel is the fuel sender wire. All the wires have to be measured between each change in fuel level. The fuel sending wire is typically red or pink, but this is not guaranteed to be true |
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- A more direct way of finding the fuel sending wire is to take out fuel sensor from the fuel tank and move the floating arm from full to empty while measuring the current of the wires. This should be done with electronics on and without ignition (key in ACC position). Fuel tank should also be empty for safety reasons, and trying to turn ignition on in this situation is likely to damage internal components. | - A more direct way of finding the fuel sending wire is to take out fuel sensor from the fuel tank and move the floating arm from full to empty while measuring the current of the wires. This should be done with electronics on and without ignition (key in ACC position). Fuel tank should also be empty for safety reasons, and trying to turn ignition on in this situation is likely to damage internal components. | ||
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Revision as of 13:52, 13 September 2021
Main Page > Accessories > Analog Fuel SensorAnalog Fuel Sensor Connection
Example of service manual describing insturment cluster pinout
General procedure of connection and calibration for an analogue
FLS (fuel level sensor)
Find the fuel sender wire:
- Easiest way to find fuel sending wire is to consult a car service manual or wiring diagram for the instrument panel. A lot of them can be found online by searching for "<your car model> service manual". The exact pin and wire can usually be found without having to test everything.
- Fuel sending wire will have variable voltage based on how much fuel the sensor is detecting. Without any manuals, fuel sending wire can be detected by measuring changes in voltage after filling/emptying fuel tank. Sensors can go from LOW voltage = FULL; HIGH voltage = EMPTY, or in reverse. The ranges can also vary, so there’s no way to know beforehand what voltage is supposed to be full and what voltage is supposed to be empty.
Typical Fuel Sensor and Fuel Gauge connection
Typically, the fuel sending wire will come from a multiple wire connector along with all the other dashboard inputs.
- With no manual, wires coming from the fuel gauge have to be tested by measuring their current, then reducing the amount of fuel in the fuel tank and then measuring current again. The wire that has reduced current in response to less fuel is the fuel sender wire. All the wires have to be measured between each change in fuel level. The fuel sending wire is typically red or pink, but this is not guaranteed to be true
- A more direct way of finding the fuel sending wire is to take out fuel sensor from the fuel tank and move the floating arm from full to empty while measuring the current of the wires. This should be done with electronics on and without ignition (key in ACC position). Fuel tank should also be empty for safety reasons, and trying to turn ignition on in this situation is likely to damage internal components.
