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 unitSteering switch
Description
When one of the steering wheel audio control switches is pushed, the
resistance in the steering wheel audio control switch circuit changes,
depending on which button is pushed.
Diagnosis Procedure
1.CHECK STEERING SWITCH RESISTANCE
Disconnect steering switch connector M88. ...
U1000 CAN comm circuit
Description
Refer to LAN-24, "CAN Communication Signal Chart".
DTC Logic
DTC DETECTION LOGIC
DTC
Trouble diagnosis name
DTC detecting condition
Possible cause
U1000
CAN COMM CIRCUIT
Driver seat control unit cannot communicate to other control
units.
...
B210C starter control relay
DTC Logic
DTC DETECTION LOGIC
NOTE:
If DTC B210C is displayed with DTC
U1000, first perform the trouble diagnosis for DTC U1000. Refer to
SEC-29, "DTC Logic".
If DTC B210C is displayed with DTC
U1010, first perform the trouble diagnosis for DTC U1010. Refer to
SEC-30, "D ...