TUNER AND AMP UNIT [WITH CENTER DISPLAY]

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Purpose

•  Controls the audio signal from the entertainment system-related parts.

Function


Tuner switching function

•  The tuner and amp unit (TAU) switches the tuner mode built-into the TAU based on the operation signal sent from the connectivity master unit (CMU).


Audio signal output function

•  The TAU outputs the audio signal sent from the following units to the speakers.
―  CMU
―  CD player
―  DVD/CD player
―  Auxiliary jack/USB port/SD card slot hub (auxiliary jack only)


RS485*1 signal conversion function

Note
•  The RS485*1 signal wiring harness is used in the following cases:
RDS-TMC
―  Traffic information such as location and length of traffic jams is sent to CMU from TAU
•  The TAU creates data from the radio waves received from the AM/FM antenna amplifier (4SD)/center roof antenna (5HB) and converts the created image data to a RS485*1 signal and sends it to the CMU.
*1  :RS485 corresponds to a linear, multi-drop configuration with bi-directional transmission, which is one of the possible types of serial communication standards, having a maximum transmission speed of 10 Mbps.


ALC (auto level control) function (without Bose®)

•  When the TAU receives the vehicle speed signal sent from the CMU, it automatically changes the volume and audio quality according to the vehicle speed and compensates for the passengers' sense of a lack of audio volume which occurs as a result of external noise while driving.


Road noise correction system (AudioPilot®) (with Bose®)

•  The volume of the music constituent obscured by noise is corrected by the audio amplifier based on the cabin noise measured by the AudioPilot® microphone and the vehicle speed signal sent from the CMU.


Specification

Item

Specification
Rated voltage
(V)
12
Frequency range
AM
(kHz)
531—1602 (With AM frequency pitch: 9KHz pitch)
FM
(MHz)
87.5—108
Amplifier maximum output
(W)
With Bose®:231
Without Bose®:25×4
Output impedance
(ohm)
4


Construction

•  The TAU is located in the upper part of the front side trim (RH).
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Input/output signal table

Terminal

Signal
1A
—
1B
—
1C
—
1D
—
1E
—
1F
—
1G
—
1H
—
1I
AUX audio input LH (+)
1J
AUX audio input LH/RH (-)
1K
AUX audio input RH (+)
1L
AUX connection detection
1M
DVD/CD audio input LH (+)
1N
DVD/CD audio input LH (-)
1O
DVD/CD audio input RH (+)
1P
DVD/CD audio input RH (-)
1Q
CMU audio input LH (+)
1R
CMU audio input LH (-)
1S
CMU audio input RH (+)
1T
CMU audio input RH (-)
1U
—
1V
—
1W
RS485 signal (+)
1X
RS485 signal (-)
1Y
—
1Z
i-stop control*2
1AA
Local HS-CAN (+)
1AB
Local HS-CAN (-)
1AC
—
1AD
—
1AE
—
1AF
—
2A
Ground
2B
—
2C
—
2D
—
2E
—
2F
ACC
2G
Vehicle speed input signal*2
2H
—
2I
—
2J
Rear door speaker output LH (-)
2K
Rear door speaker output RH (-)
2L
Rear door speaker output LH (+)
2M
Rear door speaker output RH (+)
2N
Front door speaker output LH (-)
2O
Front door speaker output RH (-)
2P
Front door speaker output LH (+)
2Q
Front door speaker output RH (+)
2R
—
2S
—
2T
B+
3A
AM/FM antenna amplifier power supply
3B
Radio antenna input
3B’
Ground
4A
DAB radio input*4
4A’
Ground*4

*2  :Without Bose®

Operation

•  For the TAU operation, refer to the ENTERTAINMENT SYSTEM. (See ENTERTAINMENT SYSTEM [WITH CENTER DISPLAY].)

Fail-safe

•  Function not equipped.