Radio, Stereo, and Compact Disc: Description and Operation

Audio Schematic

Mid System:

Premium System:

AUDIO

System Description

BASE AND MID SYSTEM
Refer to Owner's Manual for audio system operating instructions. Power is supplied at all times
- through 20 A fuse (No. 31, located in the fuse and fusible link box)
- to audio unit terminal 19.

With the ignition switch in the ACC or ON position, power is supplied
- through 10 A fuse [No. 6, located in the fuse block (J/B)]
- to audio unit terminal 7.

Ground is supplied through the case of the audio unit.

Then audio signals are supplied
- through audio unit terminals 2, 3, 4, 5, 11, 12, 13 and 14
- to terminals + and - of front door speaker LH and RH and
- to terminals + and - of rear speaker LH and RH.

PREMIUM SYSTEM
Refer to Owner's Manual for audio system operating instructions. Power is supplied at all times
- through 20 A fuse [No. 17, located in the fuse block (J/B)]
- to audio amplifier terminal 17,
- through 20 A fuse (No. 31, located in the fuse and fusible link box)
- to audio amplifier terminal 1 and
- to audio unit terminal 19. With the ignition switch in the ACC or ON position, power is supplied
- through 10 A fuse [No. 6, located in the fuse block (J/B)]
- to audio unit terminal 7.

Ground is supplied through the case of the audio unit.

Ground is also supplied
- to audio amplifier terminals 4 and 20
- through body grounds B7 and B19.

Then audio signals are supplied
- through audio unit terminals 2, 3, 4, 5, 11, 12, 13 and 14
- to audio amplifier terminals 5, 6, 7, 8, 21, 22, 23 and 24.

Audio signals are amplified by the audio amplifier.

The amplified audio signals are supplied
- through audio amplifier terminals 2, 3, 11, 12, 13, 14, 15, 16, 18, 19, 27, 28, 29, 30, 31 and 32
- to terminals + and - of front door speaker LH and RH
- to terminals + and - of front tweeter LH and RH
- to terminals 1, 2, 3 and 4 of rear speaker assembly LH and RH.

Steering Wheel Audio Control Switches (MR20DE Models with Mid and Premium System)
When one of steering wheel audio control switches is pushed, the resistance in steering switch circuit changes depending on which button is pushed.

Satellite Radio Tuner
Power is supplied at all times
- through 20 A fuse (No. 31, located in the fuse and fusible link box)
- to satellite radio tuner terminal 32.

With the ignition switch in the ACC or ON position, power is supplied
- through 10 A fuse [No. 6, located in the fuse block (J/B)]
- to satellite radio tuner terminal 36.

Ground is supplied through the case of the satellite radio tuner.
Then audio signals are supplied
- through satellite radio tuner terminals 21, 22, 23 and 24
- to audio unit terminals 33, 34, 35 and 36.

SPEED SENSITIVE VOLUME SYSTEM (MID AND PREMIUM 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.