On-Vehicle Inspection

1. CHECK FUEL PUMP OPERATION
- 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 inspection in fuel pump)





- Check that there is pressure in the inlet hose from the fuel filter.

HINT:
- At this time, you will hear fuel return noise.
- If there is no pressure, check these parts:
- M-Fuse (AM2 30A)
- Fuses (EFI 15A, IGN 7.5A)
- EFI main relay
- Fuel pump
- ECM
- Wiring connections

- Turn the ignition switch to LOCK.
- Remove the TOYOTA hand-held tester.
2. CHECK FUEL PRESSURE
- 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 (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.
- Connect the TOYOTA hand-held tester to the DLC3.
(See on-vehicle inspection in fuel pump)
- 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
- Injectors
- Disconnect the TOYOTA hand-held tester from the DLC3.
- Start the engine.
- Measure the fuel pressure at idle.