2008 Lexus LS 460FACTORY OEM SERVICE PROCEDURE

Automatic Transmission System: Precaution

NOTE:
  • When disconnecting the cable from the negative (-) battery terminal, initialize the following systems after the cable is reconnected.
    SYSTEM REFERENCE

    System Name See Procedure
    Navigation System (for DVD) INITIALIZATION
    Advanced Parking Guidance System
    Power Trunk Lid System
    Rear Door Sunshade System
  • If any parts are replaced, perform the following as necessary referring to the table below.
PARTS SPECIFICATION

Replaced Parts Reset Memory*1 Set Transmission Compensation Code Learning by Driving (Road Test)
Automatic transmission assembly -*2 Perform*3 Perform
  • Valve body assembly
  • Shift solenoid valve SL1, 2, 3,4 and 5
- - Perform
TCM (If possible, read the transmission compensation code from the previous TCM) Possible - Perform*4 Perform
Impossible - Perform*5 Perform
  • Engine assembly
  • ECM
Perform - Perform
HINT:
  • *1: Reset Memory cannot be completed by only reconnecting the cable to the negative (-) battery terminal.
  • *2: When "Set Transmission Compensation Code" is performed, "Reset Memory" is automatically completed.
  • *3: New automatic transmission's compensation code.
  • *4: Read the compensation code from the previous TCM, then transfer it to the new TCM.
  • *5: Set the transmission compensation code of the current automatic transmission.
  • Registration of the transmission compensation code (see REGISTRATIONΒ  ).
  • Learning by driving (Road Test) (see INITIALIZATIONΒ  ).
  • Reset Memory (see INITIALIZATIONΒ  ).
NOTE: Reset Memory cannot be completed by only reconnecting the cable to the negative (-) battery terminal.
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:

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

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