2004 Lexus LX 470FACTORY OEM SERVICE PROCEDURE

Motor Shift Control System: Inspection

  1. INSPECT SWITCH POSITION 
    1. Start the engine, and shift the transfer shift lever to the "H"position.
    2. Check that the center diff. indicator light comes on when the switch is in "ON"position. Check that the light goes off when the switch is in "OFF"position.
      Fig 1: Inspecting Switch Position
      G00914736Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. INSPECT SHIFT LEVER POSITION 
    1. Start the engine, and turn the center diff. lock switch to OFF.
    2. Check that the center diff. indicator light comes on when the transfer shift lever is shifted to the "L"position. Check that the light goes off when the lever is shifted to the "N"or "H"position.
      Fig 2: Inspecting Shift Lever Position
      G00914737Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSPECT CENTER DIFF. LOCK CONTROL RELAY 
    1. Check that continuity exists between each terminal, as shown in Fig 3 .
      Fig 3: Center Diff. Lock Control Relay Continuity Table
      G00914738Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      If no continuity exists, check that continuity exists when changing the position of (+) probe for the position of negative (-) probe of tester.

    2. Apply battery positive voltage between each terminal and check that continuity exists between each terminal, as shown in Fig 4 .
      Fig 4: Center Diff. Lock Control Relay Voltage Table
      G00914739Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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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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