Fuel System

- Check the battery positive voltage is above 12 V.
- Disconnect the negative (-) terminal cable from the battery.
- Remove the union bolt and 2 gaskets, and disconnect the fuel inlet hose from the filter outlet.

CAUTION:
- Put a shop towel under the fuel filter.
- Slowly loosen the union bolt.





- Install the fuel inlet hose and SST (pressure gauge) to the fuel filter outlet with the 3 gaskets and the SST (union bolt).
SST 09268-45012

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

- Wipe off any splattered gasoline.





- Connect the LEXUS hand-held tester to the DLC3. (See step 1. check fuel pump operation (a) to (f))
- 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 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

- Remove the LEXUS hand-held tester from the DLC3.
- Reinstall the fuse cover on the instrument panel.
- 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/sq. cm, 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/sq. cm, 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/sq. cm, 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 the SST to prevent gasoline from splashing.
SST 09268-45012
- Reconnect the fuel inlet hose with 2 new gaskets and the union bolt.

Torque: 29 N.m (300 kgf.cm, 21 ft.lb.ft.)

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

(See fuel system in Precaution)