DTC CB-13: USB Over Current Detection: Procedure

1. Disconnect the USB device or "iPod" from the No. 1 stereo jack adapter assembly.
2. Turn the engine switch off.

   HINT: 

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

3. Turn the engine 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 

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

NEXT: Go to next step 

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 

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 U11 No. 1 Stereo Jack Adapter Assembly Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   U11-1 (UPI) - U11-4 (UJSG)	Engine switch on (ACC)	5 V

   TEXT IN ILLUSTRATION
   
   

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

NG → See step   5 

OK → See step   6 

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

   Courtesy 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