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HOMESERVICE MANUALSLEXUS2010RX 450H 3.5 BREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTENTERTAINMENT SYSTEMSAUDIO / VIDEO SYSTEM (W/O NAVIGATION) (DIAGNOSTIC CODES & SYMPTOM TESTS)AUDIO AND VISUAL SYSTEM (W/O NAVIGATION SYSTEM)DTC CB-13: USB OVER CURRENT DETECTION (TO 08/2009)PROCEDURE
2010 Lexus RX 450h 3.5 B

DTC CB-13: USB Over Current Detection (To 08/2009): Procedure

2010 Lexus RX 450h 3.5 BSECTION 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 power switch off.

      HINT: 

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

    3. Turn the power switch on (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 occurs again.

      HINT: 

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

      OK

      Malfunction disappears.

    NG → See step   4 

    OK → USB DEVICE OR "iPod" WAS DEFECTIVE 

  4. INSPECT MULTI-MEDIA INTERFACE ECU 
    1. Disconnect the No. 1 stereo jack adapter assembly connector.
    2. Measure the voltage according to the value(s) in the table below.
      Fig 1: Identifying No. 1 Stereo Jack Adapter Assembly Connector Terminals
      GTY259362Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Voltage

      Tester Connection Condition Specified Condition
      U11-1 (UPI) - U11-4 (UJSG) Always 5 V
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to No. 1 Stereo Jack Adapter Assembly)

    NG → See step   6 

    OK → See step   5 

  5. REPLACE NO. 1 STEREO JACK ADAPTER ASSEMBLY. Refer to  REMOVAL 
  6. CHECK WIRE HARNESS AND CONNECTOR 
    1. Disconnect the multi-media interface ECU connector.
    2. Measure the resistance according to the value(s) in the table below.
      Fig 2: Identifying U11 & U12 Multi-Media Interface ECU Connector Terminals
      GTY261038Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      U11-1 (UPI) - U12-4 (UPO) Always Below 1 Ω
      U11-4 (UJSG) - U12-1 (UESG) Always Below 1 Ω
      U11-1 (UPI) - Body ground Always 10 kΩ or higher
      U11-4 (UJSG) - Body ground Always 10 kΩ or higher
      TEXT IN ILLUSTRATION

      *1 Front view of wire harness connector
      (to Multi-media Interface ECU)
      *2 Front view of wire harness connector
      (to No. 1 Stereo Jack Adapter Assembly)

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   7 

  7. REPLACE MULTI-MEDIA INTERFACE ECU. Refer to  REMOVAL 
RENDER: 1.0x

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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.