Fuel Pressure: Testing and Inspection

FUEL LINE PRESSURE INSPECTION [LF]

WARNING:
- Fuel line spills and leakage from the pressurized fuel system are dangerous. Fuel can ignite and cause serious injury or death and damage. To prevent this, complete the following inspection with the engine stopped.

1. Follow "BEFORE SERVICE PRECAUTION" before performing any work operations to prevent fuel from spilling from the fuel system. Before Service Precaution

2. Remove the battery cover. Removal and Replacement

3. Disconnect the negative battery cable. Removal and Replacement

4. Disconnect the quick release connector (in the engine compartment). Quick Release Connector Removal/Installation

5. Turn the lever of the SST parallel to the hose as shown in the figure.






6. Insert the SST quick release connector into the fuel pipe until a click is heard.

7. Verify that the quick release connector is firmly connected by pulling it by hand.

8. Start the fuel pump using the following procedure:
Using M-MDS
1 Connect the negative battery cable. Removal and Replacement
2 Connect the M-MDS to the DLC-2.





3 Start the fuel pump using the "FP" simulation function. On-Board Diagnostic Test

Without using M-MDS
1 Short the check connector terminal F/P to ground using a jumper wire.










2 Turn the ignition switch to the ON position to operate the fuel pump.

9. Operate the fuel pump for 10 s.

10. Measure the fuel line pressure.

- If not within the specification, inspect the following:

If it less than the specification:
- Fuel pump unit
- Fuel line for clogging or leakage

If it exceeds the specification:
- Fuel line clogging

Fuel pressure (Reference)
- 375-450 kPa {3.83-4.58 kgf/cm2, 54.4-65.2 psi}

11. Stop the fuel pump using the following procedure:
Using M-MDS
1 Stop the fuel pump using the "FP" simulation function. On-Board Diagnostic Test

Without using M-MDS
1 Turn the ignition switch to off to stop the fuel pump.

12. Measure the fuel hold pressure after 5 min.

- If not within the specification, inspect the following:

- Fuel line leakage

Fuel hold pressure (Reference)
- 200 kPa {2.04 kgf/cm2, 29.0 psi} or more

13. Follow "BEFORE SERVICE PRECAUTION" before performing any work operations to prevent fuel from spilling from the fuel system. Before Service Precaution

14. Disconnect the SST.

15. Connect the quick release connector to the fuel distributor. Quick Release Connector Removal/Installation

16. Complete the "AFTER SERVICE PRECAUTION". After Service Precaution