Fuel Gauge Sender: Testing and Inspection
Fuel Gauge Sending Unit TestSpecial Tools Required
Fuel sender wrench 07AAA-S0XA100
NOTE: For the fuel gauge sending system circuit diagram, refer to the gauges circuit diagram.
1. Check the No.9 BACK UP LIGHT INSTRUMENT LIGHT (10 A) fuse in the driver's under-dash fuse/relay box before testing.
2. Turn the ignition switch OFF.
3. Remove the driver's side second row seat.
4. Cut the carpet, then remove the access panel from the floor.
5. Remove the access panel (A) from the floor, then disconnect the fuel pump 5P connector (B).
6. Measure voltage between fuel pump 5P connector terminals No.1 and No.2 with the ignition switch ON (II). There should be battery voltage.
- If the voltage is as specified, go to step 7.
- If the voltage is not as specified, check for:
- An open in the ORN/WHT or BLK/YEL wire.
- poor ground (G505).
7. Turn the ignition switch OFF.
8. Install a 2 Ohms resistor between fuel pump 5P connector terminals No.1 and No.2.
9. Turn the ignition switch ON (II).
10. Check that the pointer of the fuel gauge indicates "F".
- If the pointer of the fuel gauge does not indicate "F", replace the gauge.
- If the gauge is OK, inspect the fuel gauge sending unit.
NOTE: The pointer of the fuel gauge returns to the bottom on the gauge dial when the ignition switch is OFF, regardless of the fuel level.
11. Turn the ignition switch OFF.
12. Remove the driver's side second row seat.
13. Cut the carpet (be careful not to cut the wire harness), then remove the access panel from the floor.
14. Disconnect the fuel pump 5P connector.
15. Remove the fuel fill cap.
16. Relieve the fuel pressure.
17. Disconnect the quick-connect fittings from the fuel tank unit.
18. Using the special tool, loosen the fuel tank unit locknut (A). Remove the fuel tank unit.
19. Measure resistance between the No.1 and No.2 terminals with the float at E (EMPTY), L (LOW), 1/2 (HALF FULL), and F (FULL) positions.
If you do not get the above readings, replace the fuel gauge sending unit.
20. If the resistance is not as specified, replace the fuel gauge sending unit.