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Home >> Lexus >> 2020 >> LS 500h AWD >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> Hybrid Transaxle System (L310F) - Service Information (3 Of 3) >> Shift Control Ecu >> Installation [10/2017 - 10/2020] >> Procedure

Installation [10/2017 - 10/2020]: Procedure

  1. INSTALL NO. 2 SHIFT CONTROL ECU BRACKET 
    1. Install the No. 2 shift control ECU bracket to the shift control ECU with the bolt.

      Torque: 4.5 N.m (46 kgf/cm, 40 in.lbf) 

      NOTE:

      Do not deform the No. 2 shift control ECU bracket.

      GTY817598Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Align the hole on the No. 2 shift control ECU bracket with the protrusion of the shift control ECU.
  2. INSTALL NO. 1 SHIFT CONTROL ECU BRACKET 
    1. Install the No. 1 shift control ECU bracket to the shift control ECU with the bolt.

      Torque: 4.5 N.m (46 kgf/cm, 40 in.lbf) 

      NOTE:

      Do not deform the No. 1 shift control ECU bracket.

      GTY827347Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Align the hole on the No. 1 shift control ECU bracket with the protrusion of the shift control ECU.
  3. INSTALL SHIFT CONTROL ECU 
    1. Install the shift control ECU with the 2 bolts.

      Torque: 7.5 N.m (76 kgf/cm, 66 in.lbf) 

      NOTE:

      Do not deform the No. 1 shift control ECU bracket and No. 2 shift control ECU bracket when installing the shift control ECU.

      GTY786146Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Align the hole on the No. 2 shift control ECU bracket with the protrusion of the air conditioning unit.
    2. Connect the 3 shift control ECU connectors.
      GTY799322Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. INSTALL NO. 2 AIR DUCT SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 28

  5. INSTALL GLOVE COMPARTMENT DOOR ASSEMBLY 

    Refer to PROCEDURE - Step 14

  6. CONNECT CABLE TO NEGATIVE AUXILIARY BATTERY TERMINAL 
    NOTE:

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

    Refer to INITIALIZATION [10/2017 - 09/2018] , or refer to INITIALIZATION [09/2018 - 10/2020]

  7. CHECK AND CLEAR DTC 

    Refer to DTC CHECK / CLEAR [10/2017 - 10/2020]

  8. INSTALL TOOL BOX 

    Refer to PROCEDURE - Step 3

  9. INSTALL LUGGAGE COMPARTMENT MAT SUB-ASSEMBLY 

    Refer to PROCEDURE - Step 11

  10. CHECK SRS WARNING LIGHT 

    Refer to OPERATION CHECK [10/2017 - 10/2020]

  11. CONFIRMATION WORK AFTER REPLACING SHIFT CONTROL ECU 
    1. After replacing the shift control ECU, check for the following symptoms. If any of these symptoms exists, be sure to perform the following procedure starting from step b.
      • The P position switch blinks when the power switch is turned on (IG) or on (READY) and the shift position is not in P.
      • The power source off automatic P function does not operate.
      • The shift position is not displayed on the meter until a shift change operation is performed.
    2. Turn the power switch on (IG).
    3. Press the P position switch and change the shift position to P.
    4. Turn the power switch on (READY).
    5. Depress the brake pedal and operate the shift lever to change the shift position to D.
    6. Check that the P position switch does not blink when the power switch is turned on (IG) or on (READY), and the shift position is not in P.
      NOTE:

      If the P position switch is blinking, be sure to perform steps b. through e. again.

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