Fuel Pressure: Testing and Inspection

- Check the battery positive voltage is above 12 V.
- Disconnect the negative (-) terminal cable from the battery.
- Remove the 6 bolts, and disconnect the No.2 timing belt cover.





- Remove the union bolt holding the fuel pipe to the delivery pipe and gasket.

CAUTION:
- Put a shop towel under the delivery pipe.
- Slowly loosen the union bolt.





- Install SST 09268-45012 (pressure gauge) to the delivery pipe with the 2 gaskets and SST (union and union bolt).

Torque: 34.3 Nm (25 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.
- Reconnect the negative (-) terminal cable to the battery.
- Turn the ignition switch ON.
- Measure the fuel pressure.

Fuel pressure: 265-304 kPa (2.7-3.1 kgt/cm2, 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.
- Vacuum Switching Valve (VSV) for fuel pressure control.
- Disconnect the TOYOTA hand-held tester from the DLC3.
- Reinstall the No.2 timing belt cover with the 6 bolts.

Torque: 9 Nm (80 in lb)

- 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 (2.7 - 3.1 kgf/cm2, 38 - 44 psi)

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

Fuel pressure: 226 - 265 kPa (2.3 - 2.7 kgf/cm2, 33 - 38 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 (1.5 kgf/cm2, 21 psi) or more

- If pressure is not as specified. check the fuel pump, pressure regulator and/or injectors.
- After checking fuel pressure. disconnect the negative (-) terminal cable from the battery and carefully remove SST 09268-45012 to prevent gasoline from splashing.
- Remove the other union bolt, 3 gaskets and fuel pipe from the delivery pipes.
- Reinstall the fuel pipe with 4 new gaskets and the 2 union bolts.

Torque: 34.3 Nm (25 ft lb)

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