2021 Lexus NX 300h BaseFACTORY OEM SERVICE PROCEDURE

Removal [10/2014 - ]: Procedure

  1. PRECAUTION 
    NOTE:

    After turning the power switch off, waiting time may be required before disconnecting the cable from the negative (-) auxiliary battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) auxiliary battery terminal notices before proceeding with work.

    Refer to PRECAUTION [10/2014 - 09/2016] , or refer to PRECAUTION [09/2016 - 09/2017] , or refer to PRECAUTION [09/2017 - 05/2019] , or refer to PRECAUTION [05/2019 - ]

  2. REMOVE NO. 3 DECK BOARD SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 2 [10/2014 - 09/2015], or refer to PROCEDURE - Step 2 [09/2015 - 09/2017], or refer to PROCEDURE - Step 2 [09/2017 - 05/2019], or refer to PROCEDURE - Step 2 [05/2019 - ]

  3. REMOVE REAR DECK FLOOR BOX 

    Refer to PROCEDURE - Step 3 [10/2014 - 09/2015], or refer to PROCEDURE - Step 3 [09/2015 - 09/2017], or refer to PROCEDURE - Step 3 [09/2017 - 05/2019], or refer to PROCEDURE - Step 3 [05/2019 - ]

  4. REMOVE DECK FLOOR BOX LH 

    Refer to PROCEDURE - Step 4 [10/2014 - 09/2015], or refer to PROCEDURE - Step 4 [09/2015 - 09/2017], or refer to PROCEDURE - Step 4 [09/2017 - 05/2019], or refer to PROCEDURE - Step 4 [05/2019 - ]

  5. DISCONNECT CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL 
    NOTE:

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

    Refer to INITIALIZATION [10/2014 - 09/2017] , or refer to INITIALIZATION [09/2017 - 05/2019] , or refer to PROCEDURE - Step 5 [05/2019 - ]

  6. REMOVE AIR CLEANER CAP AND HOSE 

    See step  3

  7. REMOVE AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY 
    1. Remove the air cleaner filter element sub-assembly from the air cleaner case sub-assembly.
  8. REMOVE AIR CLEANER CASE SUB-ASSEMBLY 
    1. Remove the 2 bolts and the air cleaner case sub-assembly.
      GTY511243Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  9. REMOVE ECM 
    1. Remove the bolt and disconnect the wire harness from the No. 2 ECM bracket.
      GTY511244Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. GTY512116Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Disengage the lock, pull down the lever and disconnect the 2 connectors from the ECM.

      NOTE:

      After disconnecting the connectors, make sure that dirt, water or other foreign matter does not contact the connecting parts of the connectors.

    3. Remove the 3 bolts and ECM.
      GTY511240Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  10. REMOVE NO. 1 ECM BRACKET 
    1. Remove the 2 screws and the No. 1 ECM bracket from the ECM.
      GTY512117Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  11. REMOVE NO. 2 ECM BRACKET 
    1. Remove the 2 screws and the No. 2 ECM bracket from the ECM.
      GTY520717Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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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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