a) Disconnect the connector from the fuel level sensor in the tank.
b) Turn on the ignition. The fuel level indicator arrow should move to the "EMPTY" position.
c) Connect a test lamp (3.4 Watt) to terminals 1 and 2 of the connector on the wire side.
d) Turn on the ignition. The indicator lamp should light up and the fuel gauge needle should move towards the "FULL" mark (full tank).
Note: The fuel gauge is filled with silicone oil, so the needle moves slowly and settles quickly.
d) If the indicator does not work as specified, check the resistance of the device.
2. Checking the resistance of the indicator, a) Measure the resistance between terminals "A" and "B".
Resistance - 55 Ohm
b) Replace the pointer if the resistance differs from the specified one.
3. Checking the voltage regulator.
a) Connect the positive terminal of the battery to terminal A (for 24V models: to terminal D), and the "minus" to terminal B.
b) Connect the positive lead of the voltmeter to terminal C and the negative lead to terminal B. Make sure that the voltage reading fluctuates around 7 V.
c) Replace the indicator if the voltage value differs from the specified one.
4. Checking the operation of the fuel level sensor.
a) Connect three 1.5V batteries in series.
b) Connect a 3.4 W test lamp to the positive terminal of the battery pack, connect the other terminal of the lamp to terminal 1 of the connector. Connect the negative terminal of the battery pack to terminal 2 of the connector.
c) Connect the voltmeter to terminals 1 and 2 of the connector.
Note: For models produced since 1993, the test is performed on terminals 1 (-) and 3 (+) of the sensor connector.
d) The voltage recorded by the voltmeter should increase as the sensor float moves away from the "FULL" position (full tank) to the "EMPTY" position.
5. Checking the resistance of the fuel level sensor.
a) Measure the resistance between terminals 1 and 2 of the sensor connector.
b) Replace the sensor if the resistance differs from that specified in the table.