LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2012 >> Matrix Base, Automatic Trans >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Entertainment Systems >> Audio / Video System (Diagnostic Codes & Symptom Tests) >> Audio And Visual System >> DTC CB-10: System Microcomputer Malfunction; DTC CB-11: Media Interface Microcomputer Malfunction; DTC CB-12: CD-LSI Malfunction >> Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC CB-10: System Microcomputer Malfunction; DTC CB-11: Media Interface Microcomputer Malfunction; DTC CB-12: CD-LSI Malfunction: Procedure

  1. REPLACE USB DEVICE OR "iPod" 
    1. Disconnect the USB device or "iPod" from the No. 1 stereo jack adapter assembly.
    2. Turn the ignition switch off.

      HINT: 

      When one of these DTCs has been stored, it is necessary to turn off the ignition switch to make it possible for the vehicle to recognize a new device when it is connected.

    3. Turn the ignition switch to ACC.
    4. Connect a known good USB device or "iPod" to the No. 1 stereo jack adapter assembly.

    NEXT: Go to next step 

  2. CLEAR DTC 
    1. Clear the DTCs. Refer to DTC CHECK / CLEAR .

    NEXT: Go to next step 

  3. RECHECK FOR DTC 
    1. Recheck for DTCs and check if the same DTC is output again.

      HINT: 

      If DTCs are detected frequently, replace the multi-media interface ECU.

      OK

      No DTCs are output.

    NG → See step   4 

    OK → USB DEVICE OR "iPod" WAS DEFECTIVE 

  4. REPLACE MULTI-MEDIA INTERFACE ECU. Refer to  REMOVAL