Fuel Pressure: Testing and Inspection

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





- 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.





- Install the fuel inlet pipe and SST 09268-4501 (pressure gauge) to the delivery pipe with 3 gaskets and SST (union bolt).

Torque: 29 Nm (22 ft lb)

- Wipe off any splattered gasoline.





- Connect the TOYOTA hand-held tester to the DLC3.
- Turn the ignition switch ON and TOYOTA hand-held tester main switch ON.

NOTICE: Do not start the engine.

- Select the active test mode on the TOYOTA hand-held tester.
- Please refer to the TOYOTA hand-held tester operator's manual for further details.
- If you have no TOYOTA hand-held tester, connect the positive (+) and negative (-) leads from the battery to the fuel pump connector.
(See step 2 in fuel pump inspection)
- Reconnect the negative (-) terminal cable to the battery.
- Turn the ignition switch ON.
- Measure the fuel pressure.

Fuel pressure: 265-304 kPa (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.
- VSV for fuel pressure control
- Remove the TOYOTA hand-held tester.
- Start the engine.





- Disconnect the vacuum sensing hose from the fuel pressure regulator, and plug the hose end.
- Measure the fuel pressure at idle.

Fuel pressure: 265-304 kPa (38-44 psi).

- Reconnect the vacuum sensing hose to the fuel pressure regulator.
- Measure the fuel pressure at idle.

Fuel pressure: 206-255 kPa (31-37 psi).

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

Fuel pressure: 147 kPa (21 psi).or more

If pressure is not as specified, check the fuel pump, pressure regulator and/or injector.
- After checking fuel pressure, disconnect the negative (-) terminal cable from the battery and carefully remove SST to prevent gasoline from splashing. SST 09268-45012
- Reconnect the fuel inlet pipe to the delivery pipe with 2 new gaskets and the union bolt.

Torque: 29 Nm (22 ft lb)

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