Fuel Pressure Release: Service and Repair

Fuel Pressure Relieving

Before disconnecting fuel lines or hoses, relieve pressure from the system by disabling the fuel pump and then disconnecting the fuel line/quick-connect fitting in the engine compartment.

With the HDS

1. Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.






2. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

3. Make sure the HDS communicates with the PCM. If it doesn't, go to the DLC circuit troubleshooting Testing and Inspection.

4. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

5. Remove the fuel fill cap to relieve the pressure in the fuel tank.

6. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

7. From the INSPECTION MENU of the HDS, select Fuel Pump OFF, then start the engine, and let it idle until it stalls.

NOTE:

- Do not allow the engine to idle above 1,000 rpm or the PCM will continue to operate the fuel pump.
- A Pending or Confirmed DTC may be set during this procedure. Check for DTCs, and clear them as needed.

8. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

9. Do the battery terminal disconnection procedure.

10. Remove the quick-connect fitting cover (A).





11. Check the fuel quick-connect fitting for dirt, and clean it if needed.

12. Place a rag or shop towel over the quick-connect fitting (A).






13. Disconnect the quick-connect fitting (A): Hold the connector (B) with one hand, and squeeze the retainer tabs (C) with the other hand to release them from the locking tabs (D). Pull the connector off.

NOTE:

- Be careful not to damage the line (E) or other parts.
- Do not use tools.
- If the connector does not move, keep the retainer tabs pressed down, and alternately pull and push the connector until it comes off easily.
- Do not remove the retainer from the line; once removed, the retainer must be replaced with a new one.





14. After disconnecting the quick-connect fitting, check it for dirt or damage.

15. Do the battery terminal reconnection procedure.

Without the HDS

1. Remove PGM-FI main relay 2 (A) from the driver's under-dash fuse/relay box.






2. Start the engine, and let it idle until it stalls.

NOTE: If any DTCs are stored, clear and ignore them.

3. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

4. Remove the fuel fill cap to relieve the pressure in the fuel tank.

5. Do the battery terminal disconnection procedure.

6. Remove the quick-connect fitting cover (A).





7. Check the fuel quick-connect fitting for dirt, and clean it if needed.

8. Place a rag or shop towel over the quick-connect fitting (A).






9. Disconnect the quick-connect fitting (A): Hold the connector (B) with one hand, and squeeze the retainer tabs (C) with the other hand to release them from the locking tabs (D). Pull the connector off.

NOTE:

- Be careful not to damage the line (E) or other parts.
- Do not use tools.
- If the connector does not move, keep the retainer tabs pressed down, and alternately pull and push the connector until it comes off easily.
- Do not remove the retainer from the line; once removed, the retainer must be replaced with a new one.





10. After disconnecting the quick-connect fitting, check it for dirt or damage.

11. Do the battery terminal reconnection procedure.