Fuel Gauge Sender: Testing and Inspection
Fuel Gauge Sending Unit TestSpecial Tools Required
Fuel sender wrench 07AAA-SOXA100
NOTE: For the fuel gauge system circuit diagram, refer to the Gauges Circuit Diagram.
1. Check the No. 10 METER (7.5 A) fuse in the under-dash fuse/relay box before testing.
2. Do the gauge drive circuit check.
- If the fuel gauge needle sweeps from the minimum to maximum position and then returns to the minimum position, the gauge is OK. Go to step 3.
- If the fuel gauge needle does not sweep from the minimum to maximum position and then return to the minimum position, replace the gauge assembly and retest.
3. Turn the ignition switch OFF.
4. Remove the rear seat cushion.
5. Remove the access panel (A) from the floor.
6. Disconnect the fuel pump 5P connector (B).
7. 2005-2006 models; Disconnect the EVAP canister vent shut valve and fuel tank pressure sensor subharness 6P connector (C).
8. Measure voltage between the 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 9.
- If the voltage is not as specified, check for:
- a short in the YEL/BLK wire to ground.
- an open in the YEL/BLK or BLK wire.
- poor ground (G501).
9. Turn the ignition switch OFF. Remove the No. 9 BACK UP (7.5 A) fuse from the under-hood fuse/relay box for at least 10 seconds, and reinstall it.
10. Install a 2 Ohms resistor between the fuel pump 5P connector terminals No. 1 and No. 2, then turn the ignition switch ON (II).
11. 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, go to step 12.
NOTE: The pointer of the fuel gauge returns to the bottom of the gauge dial when the ignition switch is OFF, regardless of the fuel level.
12. Relieve the fuel pressure.
13. Remove the fuel fill cap.
14. Disconnect the quick-connect fittings from the fuel pump.
15. Using the special tool, loosen the fuel tank unit locknut (A), and remove the fuel tank unit from the fuel tank.
16. Measure resistance between the No. 1 and No. 2 terminals with the float at E (EMPTY), 1/2 (HALF FULL), and F (FULL) positions. If you do not get the mentioned readings, replace the fuel gauge sending unit, 2005-2006 models.
NOTE: Remove the No. 9 BACK UP (7.5 A) fuse from the under-hood fuse/relay box for at least 10 seconds after completing troubleshooting otherwise it may take up to 20 minutes for the fuel gauge to indicate the correct fuel level.