Fuel Pressure: Testing and Inspection

FUEL LINE PRESSURE INSPECTION [13B-MSP]

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. Complete the "BEFORE SERVICE PRECAUTION". Before Service Precaution

2. Disconnect the negative battery cable.

3. Disconnect the engine compartment side quick release connector. Quick Release Connector Removal/Installation






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






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

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

7. Start the fuel pump using the following procedure.

Using M-MDS
- Connect the negative battery cable. Removal and Replacement
- Connect the M-MDS to the DLC-2.





- Using the simulation function "FP", start the fuel pump. On-Board Diagnostic Test

Without using M-MDS
- Connect the negative battery cable. Removal and Replacement

CAUTION:
- Shorting the wrong terminal of the check connector may cause malfunctions. Make sure to short only the specified terminal.

- Ground the check connector terminal F/P using the jumper wire.





- Turn the ignition switch to the ON position and operate the fuel pump.

8. Measure the fuel line pressure.

- If not within the specification, inspect or replace the following parts:

If it is less than the specification
- Fuel pump unit
- Fuel line leakage

If it is more than the specification
- Fuel pump unit
- Fuel line clogging

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

9. Stop the fuel pump using the following procedure.

Using M-MDS
- Using the simulation function "FP", stop the fuel pump. On-Board Diagnostic Test

Without using M-MDS
- Disconnect the jumper wire and stop the fuel pump.

10. Wait 5 min and measure the fuel hold pressure.

- If it is within the specification, inspect the following.

- Fuel line for clogging or leakage

Fuel hold pressure
- 200 kPa {2.0 kgf/cm2, 29 psi}

11. Complete the "BEFORE SERVICE PRECAUTION". Before Service Precaution

12. Disconnect the SST.

13. Connect the quick release connector. Quick Release Connector Removal/Installation

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