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Basic Repair Hint

  1. Use fender, seat and floor covers to keep the vehicle clean and prevent damage.
  2. During disassembly, keep parts in the appropriate order to facilitate reassembly.
  3. Installation and removal of battery terminal:
    Fig 1: Disconnecting Terminal Of Battery
    G02831827Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Before performing electrical work, disconnect the negative (-) terminal cable from the battery.
    2. If it is necessary to disconnect the battery for inspection or repair, first disconnect the negative (-) terminal cable.
    3. When disconnecting the terminal cable, to prevent damage to battery terminal, loosen the cable nut and raise the cable straight up without twisting or prying it.
    4. Clean the battery terminals and cable ends with a clean shop rag. Do not scrape them with a file or other abrasive objects.
    5. Install the cable ends to the battery terminals after loosening the nut, and tighten the nut after installation. Do not use a hammer to tap the cable ends onto the terminals.
    6. Be sure the cover for the positive (+) terminal is properly in place.
  4. Check hose and wiring connectors to make sure that they are connected securely and correctly.
  5. Non-reusable parts
    1. Always replace cotter pins, gaskets, O-rings, oil seals, etc. with new ones.
    2. Non-reusable parts are indicated in the component illustrations by the "*" symbol.
  6. Pre-coated parts
    Fig 2: Indicating Pre-Coated Parts
    G02831828Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Precoated parts are bolts, nuts, etc. that are coated with a seal lock adhesive at the factory.

    1. If a pre-coated part is retightened, loosened or caused to move in any way, it must be recoated with the specified adhesive.
    2. When reusing pre-coated parts, clean off the old adhesive and dry with compressed air. Then apply the specified seal lock adhesive to the bolt, nut or threads.
    3. Pre-coated parts are indicated in the component illustrations by the "*" symbol.

  7. When necessary, use a sealer on gaskets to prevent leaks.
  8. Carefully observe all specifications for bolt tightening torques. Always use a torque wrench.
  9. Use of special service tools (SST) and special service materials (SSM) may be required, depending on the nature of the repair. Be sure to use SST and SSM where specified and follow the proper work procedure. A list of SST and SSM can be found in Preparation section in this manual.
    10. Fig 3: Comparing High Current Fuse & Medium Current Fuse
    G02831829Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  10. When replacing fuses, be sure the new fuse has the correct amperage rating. DO NOT exceed the rating or use one with a lower rating.
    Fig 4: Types Of Fuses & Their Symbols
    G02831830Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  11. Care must be taken when jacking up and supporting the vehicle. Be sure to lift and support the vehicle at the proper locations (See VEHICLE LIFT AND SUPPORT LOCATIONS )
    • Cancel the parking brake on the level place and shift the transmission in Neutral (or N position).
    • When jacking up the front wheels of the vehicle at first place stoppers behind the rear wheels.
    • When jacking up the rear wheels of the vehicle at first place stoppers before the front wheels.
    • When either the front or rear wheels only should be jacked up, set rigid racks and place stoppers in front and behind the other wheels on the ground.
    • After the vehicle is jacked up, be sure to support it on rigid racks. It is extremely dangerous to do any work on a vehicle raised on a jack alone, even for a small job that can be finished quickly.
  12. Observe the following precautions to avoid damage to the following parts:
    1. Do not open the cover or case of the ECU unless absolutely necessary. (If the IC terminals are touched, the IC may be destroyed by static electricity.)
    2. To disconnect vacuum hoses, pull off the end, not the middle of the hose.
      Fig 5: Proper Way Of Disconnecting Vacuum Hoses
      G02831831Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. To pull apart electrical connectors, pull on the connector itself, not the wires.
      4. Fig 6: Proper Way Of Disconnecting Connectors
      G02831832Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Be careful not to drop electrical components, such as sensors or relays. If they are dropped on a hard floor, they should be replaced and not reused.
    5. When steam cleaning an engine, protect the electronic components, air filter and emission-related components from water.
    6. Never use an impact wrench to remove or install temperature switches or temperature sensors.
    7. When checking continuity at the wire connector, insert the tester probe carefully to prevent terminals from bending.
    8. When using a vacuum gauge, never force the hose onto a connector that is too large. Use a step-down adapter for adjustment. Once the hose has been stretched, it may leak air.
  13. Installation and removal of vacuum hose:
    Fig 7: Installing & Removing Of Vacuum Hose
    G02831833Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. When disconnecting vacuum hoses, use tags to identify how they should be reconnected to.
    2. After completing a job, double check that the vacuum hoses are properly connected. A label under the hood shows the proper layout.
  14. Unless otherwise stated, all resistance is measured at an ambient temperature of 20°C (68°F). Because the resistance may be outside specifications if measured at high temperatures immediately after the vehicle has been running, measurement should be made when the engine has cooled down.
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