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 unitAutomatic air conditioner system
System Diagram
CONTROL SYSTEM
The control system consists of input sensors, switches, the A/C auto amp.
(microcomputer) and outputs. The
relationship of these components is as shown in the figure below:
System Description
CONTROL OPERATION
Display
The operation status of the HVAC system ...
Trunk room lamp circuit
Description
Controls the trunk room lamp (ground side) to turn the trunk room lamp ON and
OFF.
Component Function Check
CAUTION: Before performing the diagnosis,
check that the following is normal.
Battery saver output/power supply
Trunk room lamp bulb
1.CHECK TRUNK ROOM LAMP OPERATI ...
B2632, B2633 air mix door motor (driver side)
Description
COMPONENT DESCRIPTION
Air Mix Door Motor (Driver side)
The air mix door motor (driver side) (1) is attached to the heater
&
cooling unit assembly.
It rotates so that the air mix door is opened or closed to a
position
set by the A/C auto amp.
Motor rotation is then ...