2021 Lexus RC F BaseFACTORY OEM SERVICE PROCEDURE

Removal [09/2014 - ]: Procedure

  1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL 
    NOTE:

    When disconnecting the cable, some systems need to be initialized after the cable is reconnected.

    Refer to INITIALIZATION [09/2014 - 08/2016] , or refer to INITIALIZATION [08/2016 - 11/2017] , or refer to INITIALIZATION [11/2017 - 03/2019] , or refer to INITIALIZATION [03/2019 - 01/2023] , or refer to INITIALIZATION [01/2023 - 10/2023] , or refer to INITIALIZATION [10/2023 - ]

  2. REMOVE V-BANK COVER SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 2 [09/2014 - 05/2018] , or refer to PROCEDURE - Step 2 [05/2018 - 03/2019] , or refer to PROCEDURE - Step 2 [03/2019 - ]

  3. REMOVE POWER STEERING ECU ASSEMBLY 

    Refer to REMOVAL [09/2014 - ]

  4. REMOVE BATTERY TRAY 
    1. Remove the 2 bolts and battery tray.
      GTY521510Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. SEPARATE NO. 1 ENGINE ROOM RELAY BLOCK AND NO. 1 JUNCTION BLOCK ASSEMBLY 
    1. Remove the 2 bolts and nut and separate the No. 1 engine room relay block and No. 1 junction block assembly.
      GTY515724Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Disengage the wire harness clamp.
      GTY515725Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Remove the bolt and wire harness clamp bracket.
  6. SEPARATE NO. 3 ENGINE ROOM RELAY BLOCK ASSEMBLY 
    1. Remove the bolt and nut and separate the No. 3 engine room relay block assembly.
      GTY515726Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the bolt and wire harness clamp bracket.
      GTY515727Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  7. REMOVE IGNITION COIL ASSEMBLY 
    1. Disconnect the 8 ignition coil assembly connectors.
      GTY515732Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Remove the 8 bolts and 8 ignition coil assemblies from the cylinder head cover sub-assembly and cylinder head cover sub-assembly LH.
      NOTE:

      If an ignition coil assembly has been struck or dropped, replace it.

      HINT: 

      Arrange the removed parts in the correct order.

  8. REMOVE SPARK PLUG 
    GTY515734Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Remove the 8 spark plugs from the cylinder head sub-assembly and cylinder head LH.
      NOTE:

      If a spark plug has been struck or dropped, replace it.

      HINT: 

      Arrange the removed parts in the correct order.

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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