Fuel Tank Unit: Testing and Inspection

Fuel Gauge Sending Unit Test

NOTE: For the fuel gauge system circuit diagram, refer to the Gauges Circuit Diagram.

1. Do multiplex integrated control system troubleshooting test mode A Troubleshooting - B-CAN System Diagnosis Test Mode A.

- If no problem is found, go to step 2.
- If DTC B1175 is indicated, go to the DTC B1175 troubleshooting B1175.

2. Check the No. 21 METER (10 A) fuse in the driver's under-dash fuse/relay box.

3. Do the gauge drive circuit check Testing and Inspection.

- If the fuel gauge needle sweeps from the minimum to maximum position and then returns to minimum, the gauge is OK. Go to step 4.
- If the fuel gauge needle does not sweep correctly, replace the gauge control module and retest.

4. Turn the ignition switch to LOCK (0).

5. Remove the fuel tank unit from the fuel tank Fuel Tank Unit Removal/Installation.

6. Measure the resistance between the No. 1 and No. 2 terminals of the fuel tank unit 5P connector with the float at E (EMPTY), LOW (LOW FUEL INDICATOR), 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.
- If the fuel gauge sending unit test is OK, do the secondary fuel gauge sending unit test Testing and Inspection.





NOTE: Remove the No. 15 BACK UP (40 A) fuse from the under-hood fuse/relay box for at least 30 seconds after completing troubleshooting, otherwise it may take up to 20 minutes for the fuel gauge to indicate the correct fuel level.