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DTC 01-DC Transmission Error: Description

WARNING: This page is about a different car, the 2006 Lexus RX 400h. However, it is still accessible from the selected car via links, so may be relevant.
DTC DETECTION CONDITION AND TROUBLE AREA

DTC No. DTC Detection Condition Trouble Area
01-DC *1 Transmission to component shown by sub-code failed (Detecting this DTC does not always mean actual failure) If the same sub-code is recorded in other components, check harness for power supply and communication system of all components shown by code
HINT:

*1: This code may be stored if the engine is started, idled for 60 seconds and then started again.
NOTE:
  • Before starting troubleshooting, be sure to clear DTCs to erase codes stored due to the reasons described in the HINT above. Then, check for DTCs and troubleshoot according to the output DTCs.
  • The radio receiver is the master unit.
  • Be sure to clear and recheck DTCs after the inspection is completed to confirm that no DTCs are output.
NOTE: Be sure to read DESCRIPTION before performing the following procedures.
  1. CHECK FOR DTC OF OTHER COMPONENTS 
    1. Check if the component shown by the 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 

        01-DC OUTPUT 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 step 2.

    B: Go to step   4 

    A: Go to next step. 

  2. IDENTIFY THE COMPONENT WHICH HAS STORED THIS CODE 
    1. Enter the diagnostic mode.
      Fig 1: Service Check Mode Flow Chart
      G04115433Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Press the preset switch "3" to change to "Detailed Information Mode".
    3. Identify the component which has stored this code.

      Component Table 

      COMPONENTS PHYSICAL ADDRESS

      Component Physical address
      Gateway ECU 1C6
      Stereo Component Amplifier 440
      Multi-display Controller 1F6
      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 DTC CHECK / CLEAR  .
  3. CHECK COMPONENT WHICH HAS STORED THIS CODE 
    1. Select the component which has stored this code.

      Component Table 

      COMPONENT REFERENCE TABLE

      Component Proceed to
      Gateway ECU GATEWAY ECU COMMUNICATION ERROR 
      Stereo Component Amplifier STEREO COMPONENT AMPLIFIER COMMUNICATION ERROR 
      Multi-display Controller MULTI-DISPLAY CONTROLLER COMMUNICATION ERROR 
      Radio receiver RADIO RECEIVER COMMUNICATION ERROR 

    NEXT: END 

  4. CLEAR DTC 
    1. Clear the DTC (See DTC CHECK / CLEAR  ).

      HINT:

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

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

      OK: Malfunction disappears. 

    NG: Go to step   3 

    OK: END 

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