Fuel System Technician Safety Information

GENERAL PRECAUTION

1. Before working on the fuel system, disconnect the cable from the negative terminal (-) of the battery.

HINT: Any diagnostic trouble code retained by the computer will be erased when the battery terminal is removed.

Therefore, if necessary. read the diagnosis before removing the battery terminal.

2. Do not smoke or work near an open flame when working on the fuel system.

3. Keep gasoline off rubber or leather parts.

MAINTENANCE PRECAUTIONS

1. Check Engine For Correct State of Tune.

2. Precautions When Connecting Gauge

a. Use the battery as the power source for the timing light, tachometer, etc.

Connecting A Tachometer To DLC 1:

b. Connect the tester probe of a tachometer to terminal IGG of the data link connector 1.

3. In The Event Of Engine Misfire, The Following Precautions Should Be Taken

a. Check proper connection of battery terminals, etc.






b. Handle high-tension cords carefully.

c. After repair work, check that the ignition coil terminals and all other ignition system lines are reconnected securely.

d. When cleaning the engine compartment. be especially careful to protect the electrical system from water.

4. Precautions When Handling Oxygen Sensor





a. Do not allow the oxygen sensor to drop or hit against an object.

b. Do not allow the sensor to come in contact with water.


AIR INDUCTION SYSTEM

1. Separation of the engine oil dipstick, oil filler cap, PCV hose. etc. may cause the engine to run out of tune.

2. Disconnection. looseness or cracks in the parts of the air induction system between the throttle body and cylinder head will cause air suction and cause the engine to run out of tune.

ELECTRONIC CONTROL SYSTEM

1. Before removing MFI wiring connectors, terminals, etc., first disconnect the power by either turning the ignition switch OFF or disconnecting the battery terminals.






2. When installing the battery, be especially careful not to incorrectly connect the positive (+) and negative (-) cables.

3. Do not permit parts to receive a severe impact during removal or installation. Handle all MFI parts carefully, especially the ECM.

4. Do not be careless during troubleshooting as there are numerous transistor circuits and contact with terminals can cause further trouble.

5. Do not open the ECM cover.

6. When inspecting during rainy weather, take care to prevent the entry of water. Also, when washing the engine compartment. prevent water from getting on the MFI parts and wiring connectors.

7. Parts should be replaced as an assembly.

8. Take care when pulling out or inserting wiring connectors.






a. Release the lock and pull out the connector. Pull on the connectors, not the wires.






b. Fully insert the connector and check that it is locked.

9. When inspecting a connector with a volt/ohmmeter:






a. Carefully take off the water-proofing rubber if it is a water-proof type connector.






b. Insert the tester probe into the connector from the wiring side when checking the continuity, amperage or voltage.

c. Do not apply unnecessary force to the terminal.

d. After checking, install the water-proofing rubber securely on the connector.






10. Use SST for inspecting or testing the injector or its wiring connector. (SST 09842-30070)


FUEL SYSTEM

1. When disconnecting the high fuel pressure line, a large amount of gasoline will spill out. so observe the following procedure.






a. Put a container under the connection.

b. Slowly loosen the connection.

c. Disconnect the connection.

d. Plug the connection with a rubber plug.

2. When connecting the flare nut or union bolt on the high pressure pipe union. observe the following procedure:

Union bolt type:






a. Always use a new gasket.

b. Tighten the union bolt by hand.

c. Tighten the bolt to the specified torque.

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

Flare nut type:

a. Apply a light coat of oil on the flare and tighten the flare nut by hand.






b. Using SST, tighten the flare nut to the specified torque. (SST 09631-22020)

Torque: 30 N.m (310 kgf.cm. 22 ft.lb.)

HINT: Use a torque wrench with a fulcrum length of 30 cm (11.81 in.).

3. Observe the following precautions when removing and installing the injectors.

a. Never reuse an O-ring.

b. When placing a new O-ring on the injector, take care not to damage it in any way.

c. Coat the new O-rings with spindle oil or gasoline before installing never use engine, gear or brake oil.











4. Install the injector in the delivery pipe and cylinder head as shown in the illustration.

5. Check for fuel leaks after performing anywhere maintenance on the fuel system.

a. With engine stopped. turn the ignition switch ON.






b. Using SST, connect terminals +B and FP of the data link connector 1. (SST 09843-18020)






c. When the fuel return hose is pinched. the pressure within the high pressure line will rise to about 392 kPa (4 kgf/cm2, 57 psi). In this state, check to make sure that there are no leaks from any part of the fuel system.

NOTE: Always pinch the hose. Avoid bending it as it may cause the hose to crack.






d. Remove the SST. (SST 09843-18020)