Vehicle Damage Warnings
PRECAUTION
1. Before working on the fuel system, disconnect the negative (-) terminal cable from the battery.
HINT: Any diagnostic trouble code retained by the ECM will be erased when the battery negative (-) terminal removed from The battery.
Therefore, if necessary, read the diagnostic trouble code(s) before removing the negative (-) terminal cable from the battery.
2. Do not smoke or work near an open flame when working on the fuel system.
3. Keep gasoline away from rubber or leather parts.
MAINTENANCE PRECAUTIONS
1. PRECAUTION WHEN CONNECTING GAUGE:
- Use battery as the power source for the timing light, etc.
2. IN EVENT OF ENGINE MISFIRE, FOLLOWING PRECAUTIONS SHOULD BE TAKEN:
- Check proper connection of battery terminals, etc.
- Handle high-tension cords carefully.
- After repair work, check that the ignition coil terminals and all other ignition system lines are reconnected securely.
- When cleaning the engine compartment, be especially careful to protect the electrical system from water.
3. PRECAUTIONS WHEN HANDLING HEATED OXYGEN SENSORS:
- Do not allow oxygen sensor to drop or hit against an object.
- Do not allow the sensor to come into contact with water.
IF VEHICLE IS EQUIPPED WITH MOBILE COMMUNICATION SYSTEM:
For vehicles with mobile communication systems such as two-way radios and cellular telephones, observe the following precautions.
- Install the antenna as far as possible away from the ECM, ECU and sensors of the vehicle's electronic system.
- Install the antenna feeder at least 20 cm (7.87 in.) away from the ECM, ECU and sensors of the vehicle's electronics systems. For details about ECM, ECU and sensors locations, refer to the section on the applicable component.
- Do not wind the antenna feeder together with the other wiring. As much as possible, also avoid running the antenna feeder parallel with other wire harnesses.
- Confirm that the antenna and feeder are correctly adjusted.
- Do not install powerful mobile communications system.
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 to LOCK or disconnecting the negative (-) terminal cable from the battery.
HINT: Always check the diagnostic trouble code before disconnecting the battery terminal.
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 even slight terminal contact can further troubles.
5. Do not open the ECM cover.
6. When inspecting during rainy weather, take care to prevent 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. Care is required when pulling out and inserting wiring connectors.
- Release the lock and pull out the connector, pulling on the connectors.
- Fully insert the connector and check that it is locked.
9. When inspecting a connector with a volt/ohmmeter.
- Carefully take out the water-proofing rubber if it is a water-proof type connector.
- Insert the test probe into the connector from wiring side when checking the continuity, amperage or voltage.
- Do not apply unnecessary force to the terminal.
- After checking, install the water-proofing rubber on the connector securely.
10. Use SST 09842-30070 or equivalent for inspection or test of the injector or its wiring connector.
FUEL SYSTEM
1. When disconnecting the high pressure fuel line, a large amount of gasoline will spill out, so observe these procedures:
- Put a container under the connection.
- Slowly loosen the connection.
- Disconnect the connection.
- 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 procedures:
Union Bolt Type:
- Always use a new gasket.
- Tighten the union bolt by hand.
- Tighten the union bolt to the specified torque.
Torque: 29 Nm (22 ft lb)
Flare Nut Type:
- Apply a light coat of engine oil to the flare and tighten the flare nut by hand.
- Using SST 09631-22020 or equivalent, tighten the flare nut to the specified torque.
Torque: 30 Nm (22 ft lb)
HINT: Use a torque wrench with a fulcrum
length of 30 cm (11.81 in).
3. Observe these precautions when removing and e installing the injectors.
- Never reuse the O-ring.
- When placing a new O-ring on the injector. take care not to damage it in any way.
- Coat a new O-ring with spindle oil or gasoline before installing-never use engine, gear or brake oil.
4. Install the injector to the delivery pipe and cylinder head as shown in the illustration.
5. Check that there are no fuel leaks after doing maintenance anywhere on the fuel system.
- Connect the TOYOTA hand-held tester to the DLC3.
- Turn ignition switch ON and TOYOTA hand-held tester main switch ON.
- 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 step 2 in fuel pump inspection)
- Pinch the fuel return hose. The pressure in high pressure line will rise to approx. 392 kPa (4 kgf/sq. cm, 57 psi).
- In this state, check to see that there are no leaks from any part of the fuel system.
NOTICE: Always pinch the hose. Avoid bending as it may cause the hose to crack.
- Turn the ignition switch to LOCK.
- Remove TOYOTA hand-held tester.