Fuel Pressure: Testing and Inspection

1. Check that the battery positive voltage is above 12 volts.
2. Disconnect the negative (-) terminal cable from the battery.





3. Remove the union bolt and 2 gaskets, and disconnect the fuel inlet pipe from the delivery pipe.

HINT:
- Put a suitable container or shop rag under the delivery pipe.
- Slowly loosen the union bolt.





4. Install the fuel inlet pipe and SST (pressure gauge) to the delivery pipe with the 3 gaskets and SST (union bolt).
SST 09268-45012

Torque: 29 N.m (300 kgf.cm, 22 ft.lbf)

- Wipe off any splattered gasoline.
5. Connect the TOYOTA hand-held tester to the DLC3.
6. Reconnect the negative (-) terminal cable to the battery.
7. Turn the ignition switch ON.
8. Measure the fuel pressure.

Fuel pressure: 265 - 304 kPa
(2.7 - 3.1 kgf/sq.cm, 38 - 44 psi)

- If pressure is high, replace the fuel pressure regulator.
- If pressure is low, check these parts:
- Fuel hoses and connections
- Fuel pump
- Fuel filter
- Fuel pressure regulator
- Injectors
9. Disconnect the TOYOTA hand-held tester from the DLC3.
10. Start the engine.
11. Measure the fuel pressure at idle.
Fuel pressure: 206 - 255 kPa
(2.1 - 2.6 kgf/sq.cm, 31 - 37 psi)

- If pressure is not as specified, check the vacuum sensing hose and fuel pressure regulator.
12. Stop the engine.
13. Check that the fuel pressure remains as specified for 5 minutes after the engine has stopped.

Fuel pressure: 147 kPa (1.5 kgf/sq.cm, 21 psi) or more

- If pressure is not as specified, check the fuel pump, pressure regulator and/or injector.
14. After checking fuel pressure, disconnect the negative (-) terminal cable from the battery and carefully remove the SST to prevent gasoline from splashing. SST O9268-45012
15. Reconnect the fuel inlet pipe to the delivery pipe with 2 new gaskets and the union bolt.

Torque: 29 N.m (300 kgf.cm, 22 ft.lbf)

16. Reconnect the negative (-) terminal cable to the battery.
17. Check for fuel leakage.