2005 Lexus IS 300 Base, AutomaticFACTORY OEM SERVICE PROCEDURE

Engine Unit: Removal

  1. REMOVE ENGINE UNDER COVER 
  2. DRAIN ENGINE COOLANT 
  3. DRAIN ENGINE OIL 
  4. REMOVE ENGINE COVER 

    Remove the 4 nuts and engine cover.

  5. REMOVE AIR CLEANER INLET 
  6. DISCONNECT BRAKE BOOSTER VACUUM HOSE 
  7. DISCONNECT RADIATOR UPPER AND LOWER HOSES FROM ENGINE 
  8. DISCONNECT ACCELERATOR CABLE FROM ENGINE 
  9. REMOVE INTAKE AIR RESONATOR 
    1. Disconnect the MAF meter connector.
    2. Disconnect the engine wire clamp from the air cleaner case.
    3. Disconnect the PCV hose from the No. 2 cylinder head cover.
    4. Loosen the 2 hose clamp bolts, remove the intake air resonator from the throttle body.
      5. Fig 1: Removing Intake Air Resonator
      G02948674Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  10. M/T: 

    REMOVE DRIVE BELT TENSIONER ABSORBER 

    Remove the 2 nuts and absorber.

  11. REMOVE DRIVE BELT (See  CHARGING SYSTEM  ) 
  12. REMOVE FRONT SUSPENSION MEMBER BRACE 

    Remove the 8 bolts and brace.

    Fig 2: Removing Front Suspension Member Brace
    G02948675Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  13. M/T: 

    REMOVE TRANSMISSION SHIFT LEVER 

  14. DISCONNECT WIRES, CABLE, STRAP, CONNECTORS, HOSES AND CLAMPS 
    1. Disconnect the ground wire from the floor.
    2. Disconnect the starter wire from the terminal and manifold stay.
    3. Disconnect the fuel inlet hose from the fuel pipe support.
      Fig 3: Disconnecting Fuel Inlet Hose From Fuel Pipe Support
      G02948676Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Disconnect the ground strap from the dash panel.
    5. Disconnect the heater hose from the heater pipe.
      6. Fig 4: Disconnecting Heater Hose From Water Bypass Pipe
      G02948677Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    6. Disconnect the heater hose from the water bypass pipe.
    7. Disconnect the EVAP hose from the pipe (from charcoal canister).
    8. Disconnect the heater oxygen sensor (bank 1 sensor 1) connector.
    9. Disconnect the heater oxygen sensor (bank 1 sensor 2) connector.
    10. Disconnect the generator wire.
    11. Disconnect the engine wire clamp from the wire clip of generator.
      Fig 5: Disconnecting Engine Wire Clamp From Wire Clip Of Generator
      G02948678Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    12. Disconnect the ground cable from the bracket on the cylinder block.
    13. Disconnect the igniter connector.
    14. Disconnect the 2 engine wire clamps from the clamp brackets.
      15. Fig 6: Disconnecting Engine Wire Clamps From Clamp Brackets
      G02948679Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  15. DISCONNECT ENGINE WIRE FROM ECM BOX 
    1. Remove the ECM hood and ECM cover.
    2. Disconnect the 3 ECM connectors.
    3. Disconnect the 4 wire harness connectors.
    4. Disconnect the 2 junction connectors.
    5. Disconnect the grommet and engine wire from the ECM box.
    Fig 7: Disconnecting Engine Wire From ECM Box
    G02948680Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  16. DISCONNECT PS PUMP AND A/C COMPRESSOR WITHOUT DISCONNECTING HOSES 
    1. Disconnect the PS air hose from the No. 4 timing belt cover.
    2. Disconnect the PS air hose from the air intake chamber
    3. Remove the 2 bolts and pump rear stay.
      Fig 8: Removing Bolts And Pump Rear Stay
      G02948681Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Remove the 3 bolts and plate washer, and disconnect the vane pump assembly from the engine.
      Fig 9: Removing Bolts And Plate Washer/Vane Pump Assembly From Engine
      G02948682Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    5. Loosen the nut.
    6. Using a torx socket (E10), remove the stud bolt and nut.
    7. Disconnect the PPS solenoid valve connector,
    8. Disconnect the A/C compressor connector.
    9. Remove the 2 bolts, and disconnect the compressor from the engine.
      10. Fig 10: Removing Bolts And Disconnecting Compressor From Engine
      G02948683Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    HINT:

    Put aside the vane pump and compressor, and suspend it securely.

  17. M/T: 

    DISCONNECT CLUTCH RELEASE CYLINDER FROM TRANSMISSION 

  18. REMOVE PROPELLER SHAFT (See  REMOVAL  ) 
  19. A/T: 

    REMOVE TRANSMISSION CONTROL ROD 

    Remove the 2 nuts and control rod.

    Fig 11: Removing Nuts And Control Rod
    G02948684Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  20. REMOVE FRONT AND CENTER EXHAUST PIPES 
  21. DISCONNECT SLIDING YOKE 
    1. Check the steering wheel at the straight ahead position, and place matchmarks on the sliding yoke and intermediate shaft.
    2. Remove the bolt, and disconnect the sliding yoke from the steering intermediate shaft.
    3. Disconnect the PS pressure switch connector and wire clamp.
      4. Fig 12: Disconnecting Sliding Yoke
      G02948685Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  22. REMOVE STABILIZER BAR 
    1. Remove the 2 nuts from the stabilizer bar links.
    2. Remove the 4 bolts, 2 stabilizer bar brackets and 2 bushings.
      3. Fig 13: Removing Bolts, Stabilizer Bar Brackets And Bushings
      G02948686Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  23. DISCONNECT SHOCK ABSORBER 

    Remove the bolt and nut, and disconnect the shock absorber from the shock absorber bracket.

    Fig 14: Removing Bolt, Nut And Disconnecting Shock Absorber From Shock Absorber Bracket
    G02948687Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  24. DISCONNECT LOWER ARM 
    1. Remove the nut, and disconnect the height level sensor from the lower arm.
    2. Remove the 2 bolts, and disconnect the lower arm from the steering knuckle.
  25. SET ENGINE JACK 
    NOTE: Using chain, hold the engine tightly.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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