Low Fuel Indicator Troubleshooting

Low Fuel Indicator Troubleshooting

If the low fuel indicator is blinking, do this:

NOTE: If the PCM has any DTCs, do the DTC troubleshooting first.

1. Turn the ignition switch to ON (II).

2. Check the LOW FUEL INDICATOR in the DATA LIST with the HDS.

Is ON indicated?
YES - Go to step 3.

NO - Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the fuel pressure switch and the PCM, then disconnect the negative cable from the battery for a few seconds to reset the low fuel indicator.


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

4. Disconnect the fuel pressure switch 2P connector. Fuel Pressure Switch Replacement

5. Check for continuity between fuel pressure switch 2P connector terminal No. 2 and body ground.

Is there continuity?
YES - Go to step 6.

NO - Repair open in the wire between the fuel pressure switch and G401, then disconnect the negative cable from the battery for a few seconds to reset the low fuel indicator.






6. Remove the driver's dashboard undercover. Driver's Dashboard Undercover Removal/Installation

7. Remove the fuel shut-off solenoid valve relay (A).

8. Turn the ignition switch to ON (II).






9. Measure the voltage between fuel pressure switch 2P connector terminal No. 1 and body ground.

Is there about 5 V?
YES - Go to step 15.

NO - Go to step 10.






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

11. Connect fuel pressure switch 2P connector terminal No. 1 to body ground with a jumper wire.

12. Jump the SCS line with the HDS.

13. Disconnect PCM connector A (44P).






14. Check for continuity between body ground and PCM connector terminal A41.

Is there continuity?
YES - Update the PCM if it does not have the latest software, ECM/PCM Update or substitute a known-good PCM, Reading and Clearing Diagnostic Trouble Codes then recheck. If the symptom/indication goes away and the PCM was updated, troubleshooting is complete. If the symptom/indication goes away and the PCM was substituted, replace the original PCM, Service and Repair then disconnect the negative cable from the battery for a few seconds to reset the low fuel indicator.

NO - Repair open in the wire between the fuel pressure switch and the PCM (A41), then disconnect the negative cable from the battery for a few seconds to reset the low fuel indicator.






15. Check the FUEL RAIL PRESSURE SENSOR in the DATA LIST with the HDS.

Is about 500 kPa or more indicated?
YES - Replace fuel pressure regulator P1, Fuel Pressure Regulator Replacement then do the battery terminal disconnection procedure Procedures to reset the low fuel indicator.

NO - Replace the original fuel pressure switch, Fuel Pressure Switch Replacement then do the battery terminal disconnection procedure Procedures to reset the low fuel indicator.