System Diagram

System Description
AUDIO SYSTEM
The audio system consists of the following components
When the audio system is on, radio signals are received by the window antenna. The AV control unit then sends audio signals to the BOSE speaker amp. The BOSE speaker amp. amplifies the audio signals before sending them to the front door speakers, tweeters, center speaker, rear door speakers and the rear subwoofers.
Refer to Owner's Manual for audio system operating instructions.
SATELLITE RADIO SYSTEM (IF EQUIPPED)
The satellite radio system consists of the following components
When the satellite radio system is on, radio signals are supplied to the AV control unit from the satellite antenna. The AV control unit then sends audio signals to the BOSE speaker amp.
Refer to Owner's Manual for satellite radio system operating instructions.
SPEED SENSITIVE VOLUME SYSTEM
Volume level of this system goes up and down automatically in proportion to the vehicle speed. The control level can be selected by the customer. Refer to Owner's Manual for operating instructions.
Component Parts Location

Component Description
|
Part name |
Description |
| AV control unit | Controls audio system, USB connection, AUX IN connection, NAVI functions and satellite radio system functions |
| Display unit | Displays all audio and climate control related information |
| BOSE speaker amp | Receives power (amp ON) and audio signals from AV control unit and outputs audio signals to each speaker |
| Steering wheel audio control switches |
|
| Front door speakers |
|
| Tweeters |
|
| Center speaker |
|
| Rear door speakers |
|
| Rear subwoofers |
|
| Satellite antenna (if so equipped) | Audio signal (satellite radio) is received and output to AV control unit. |
Navigation systemTCM branch line circuit
Diagnosis Procedure
1.CHECK CONNECTOR
Turn the ignition switch OFF.
Disconnect the battery cable from the negative terminal.
Check the following terminals and connectors for damage, bend and
loose connection (unit side and connector
side).
TCM
Harness connector F1
Harness con ...
RGB synchronizing signal circuit
Description
Transmit the RGB synchronizing signal to the display unit so as to
synchronize the RGB image displayed with
AV control unit.
Diagnosis Procedure
1.CHECK CONTINUITY RGB SYNCHRONIZING SIGNAL CIRCUIT
Turn ignition switch OFF.
Disconnect display unit connector M141 and AV co ...
B257B, B257C ambient sensor
Description
COMPONENT DESCRIPTION
Ambient Sensor
The ambient sensor (1) is installed to the front bumper
reinforcement.
It detects ambient temperature and converts it into a resistance
value which is then input into the A/C auto amp.
Ambient Sensor Circuit
AMBIENT TEMPERATUR ...