Interior equipment (Honda Civic 5)

Checking the fuel level indicator/sensor

Warning: Do not smoke while working on the fuel system. Keep open flames away from your work area.

1. Before starting the test, check fuse #25 (7.5A) in the under-panel fuse and relay box.

2. Remove the access hatch from the floor.

3. Disconnect the ZK connector from the fuel level indicator.



4. Connect the positive probe of the voltmeter to terminal #2 and the negative probe to terminal #1, then turn the ignition switch ON(II). The voltage should be between 5 and 8 V.

• If the voltage is within specification, proceed to step 5.
• If the voltage is out of specification, check:
• Wire break YEL7BLK or BLK.
• Poor grounding (G552).

5. Turn the ignition switch OFF.

6. Connect the connecting wire between terminals No.1 and No.2, then turn the ignition switch ON(II).

7. Check that the fuel gauge needle has started to move towards the "F" mark.

Caution: Turn the ignition switch OFF before the pointer reaches the "F" mark on the pointer scale. Otherwise, the pointer may be damaged.

Note: The fuel gauge is electromagnetic type, therefore the fuel level is continuously indicated even when the ignition switch is turned OFF, and the needle moves slower than the bimetal type gauge. (Except KY).

• If the fuel gauge needle does not move at all, replace the gauge.
• If the indicator is OK, inspect the fuel level sensor.

8. Remove the fuel level sensor as shown.





9. Measure the resistance between contacts ±1 and ±2 in positions E (empty), 1/2 (half full) and F (full), moving the float.

• Replace the fuel level sensor if it cannot provide the above readings.

[Original material on the website: HONDABOOK]