Fuel Delivery and Air Induction: Service Precautions

PRECAUTION

1. BEFORE WORKING ON FUEL SYSTEM, DISCONNECT NEGATIVE (-) TERMINAL CABLE FROM BATTERY

HINT: Any diagnostic trouble code retained by the computer will be erased when the negative (-) terminal cable is removed from the battery.
Therefore, if necessary, read the diagnosis before removing the negative (-) terminal cable from the battery.

2. DO NOT SMOKE OR WORK NEAR AN OPEN FLAME WHEN WORKING ON FUEL SYSTEM

3. KEEP GASOLINE AWAY FROM RUBBER OR LEATHER PARTS

4. AIR INDUCTION SYSTEM
a. Separation of the engine oil dipstick, oil filler cap, PCV hose, etc. may cause the engine to run out of tune.
b. Disconnection, looseness or cracks in the parts of the air induction system between the throttle body and cylinder head will allow air suction and cause the engine to run out of tune.

5. FUEL SYSTEM

a. Observe these precautions when handling nylon tube.
1. Pay attention not to turn the connected part of the nylon tube and quick connector witht he tube when connecting them.
2. Pay attention not to kink the nylon tube.
3. Do not remove the EPDM protector on the outside of the nylon tube.
4. Must not close the piping with the nylon tube by bending it.
Before installing the injector, must apply spindle oil or gasoline on the place where a delivery pipe or an intake manifold touches an O-ring of the injector.

b. Check that there are no fuel leaks after performing maintenance anywhere on the fuel system.




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

NOTE: Do not start the engine.

3. Select the active test mode on the TOYOTA hand-held tester.
4. Please refer to the TOYOTA hand-held tester operator s manual for further details.
5. If you have no TOYOTA hand-held tester, connect the positive (+) and negative (-) leads from the battery to the fuel pump connector.
6. Check that there are no leaks from any part of the fuel system.
7. Turn the ignition switch to LOCK.
8. Disconnect the TOYOTA hand-held tester from the DLC3.