Fuel Gauge Sender: Testing and Inspection
Fuel Gauge Sending Unit Test
NOTE: For the fuel gauge system circuit diagram, refer to the Gauges Circuit Diagram.
1. Check the No. 22 METER (7.5 A) fuse in the under- dash fuse/relay box before testing.
2. Check for body electrical system DTCs.
- If no DTCs is found, go to step 3.
- If DTC B1175 or B1176 is indicated, go to the indicated DTC's troubleshooting.
3. Turn the ignition switch to LOCK (0).
4. Remove the rear seat cushion Rear Seat Removal/Installation.
5. Remove the access panel (A) from the floor.
6. Disconnect the fuel tank unit 4P connector (B).
7. Measure the voltage between fuel tank unit 4P connector terminals No. 1 and No. 3 with the ignition switch turned to ON (II). There should be battery voltage.
- If the voltage is OK, go to step 8.
- If the voltage is not as specified, check for:
- a short in the LT GRN wire to ground.
- an open in the LT GRN or BLK wire.
8. Turn the ignition switch to LOCK (0).
9. Remove the fuel tank unit from the fuel tank Fuel Tank Unit Removal/Installation.
10. Measure the resistance between fuel tank unit 4P connector terminals No. 1 and No. 3 with the float at E (EMPTY), LOW (LOW FUEL INDICATOR), 1/2 (HALF FULL), and F (FULL) positions.
If you do not get the following readings, replace the fuel gauge sending unit Fuel Pump/Fuel Gauge Sending Unit Replacement.
'10 model
'11 model
11. Reconnect the fuel tank unit 4P connector.
12. Remove the No. 1 BACK UP (15 A) fuse from the under-dash fuse/relay box for at least 10 seconds, then reinstall it.
13. Turn the ignition switch to ON (II).
14. Check that the fuel gauge indicates F with the float at F.
- If the fuel gauge does not indicate F, replace the gauge control module.
- If the gauge is OK, the test is complete.
NOTE: Remove the No. 1 BACK UP (15 A) fuse from the under-dash 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.