Description
U1300 is indicated when a communication signal malfunction occurs. U1300 is indicated along with DTCs that identify components connected to the AV control unit through communication lines. Determine the possible malfunction cause from the table below.
SELF-DIAGNOSIS RESULTS DISPLAY ITEM

U1255 satellite radio tuner
U1310 AV control unitFront door speaker
Description
The AV control unit sends audio signals to the BOSE speaker amp. The BOSE
speaker amp. amplifies the
audio signals before sending them to the front door speakers using the audio
signal circuits.
Diagnosis Procedure
1.CONNECTOR CHECK
Check the AV control unit, BOSE speaker amp. ...
Symptom diagnosis
AUDIO SYSTEM
Symptom Table
AUDIO SYSTEM
Symptoms
Check items
Probable malfunction location
The disk cannot be removed.
Audio unit
Malfunction in audio unit.
Refer to AV-73, "Removal and
Installation".
No sound comes out ...
Warning lamp
Description
Warning lamp is built in combination meter.
Intelligent Key system malfunction is reported
to the driver by the warning lamp illumination.
Component Function Check
1.CHECK FUNCTION
Perform "INDICATOR" in the "Active Test" mode
with CON ...