DTC B15BB: Multi-media Interface ECU Malfunction: Procedure

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

   HINT: 

   When this DTC 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.

   HINT: 

   • If the malfunction occurred when a USB device was in use, use another USB device for the inspection. If the malfunction occurred when an "iPod" was in use, use another "iPod" for the inspection.

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 trouble occurs again.

   OK

   No DTCs are output.

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: m1 Connector Terminal Identification

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   STANDARD VOLTAGE
   
   

   Tester Connection	Condition	Specified Condition
   m1-1 (UPI) - m1-4 (UJSG)	Engine switch on (ACC)	5 V

   TEXT IN ILLUSTRATION
   
   

   *a	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: J110 & m1 Connector Terminal Identification

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   STANDARD RESISTANCE
   
   

   Tester Connection	Condition	Specified Condition
   J110-4 (UPO) - m1-1 (UPI)	Always	Below 1 Ω
   J110-1 (UESG) - m1-4 (UJSG)	Always	Below 1 Ω
   m1-1 (UPI) - Body ground	Always	10 kΩ or higher
   m1-4 (UJSG) - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

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

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   7