2012 Lexus LS 460 AWDFACTORY OEM SERVICE PROCEDURE

DTC 01-DC: Transmission Error: Procedure

  1. CHECK FOR DTC OF OTHER COMPONENTS 
    1. Check if the component shown by sub-code is displayed in the check result of the other components.
      1. Check if "01-DC" is output for the other components.
      2. If "01-DC" is output for any other components, check if the same physical address is displayed.
        RESULT

        Result Proceed to
        "01-DC" is output and the same physical address is displayed A
        "01-DC" is not output or the same physical address is not displayed B

        HINT: 

        For the list of the components shown by sub-codes, refer to the table in the next step.

    B → See step   4 

    A: Go to next step 

  2. IDENTIFY COMPONENT WHICH HAS STORED THIS CODE 
    1. Enter the diagnostic mode.
      Fig 1: Identifying Display Screen - Service Check Mode (Example)
      GTY150533Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Press the preset switch "2" to change to "Detailed Information Mode".
    3. Identify the component which has stored this code.
      COMPONENT TABLE

      Component Physical address
      Stereo component amplifier 440
      Integration control and panel assembly 1C4
      Radio receiver 190

      HINT: 

      • "440 (Stereo component amplifier)" is the component which has stored this code in the example shown in the illustration.
      • For details of the DTC display, refer to the "DTC CHECK/CLEAR". Refer to DTC CHECK / CLEAR .

    NEXT: Go to next step 

  3. CHECK COMPONENT WHICH HAS STORED THIS CODE 
    1. Select the component which has stored this code.
      COMPONENT TABLE

      Component Proceed to
      Stereo component amplifier Stereo component amplifier communication error
      Integration control and panel assembly Integration control and panel assembly communication error
      Radio receiver Radio receiver communication error

    NEXT → END 

  4. CLEAR DTC 
    1. Clear the DTC. Refer to DTC CHECK / CLEAR .

      HINT: 

      If "01-DC" is output for only one component, this may not indicate a malfunction.

    NEXT: Go to next step 

  5. RECHECK DTC 
    1. Recheck the DTC and check if the same trouble code occurs again.

      OK

      Malfunction disappears.

    NG → See step   3 

    OK → END 

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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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