Radio, Stereo, and Compact Disc: Description and Operation

System Description

BASE SYSTEM

Refer to Owners Manual for audio system operating instructions.

Power is supplied at all times
- through 15 A fuse [No.37 located in the fuse and fusible link box]
- to audio unit terminal 6.

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 10.

Ground is supplied through the case of the audio unit.

Audio unit and A/C and audio controller are connected by FPC (Flexible Print Circuit).

A/C and audio controller integrates A/C switches and audio switches.

When A/C and audio controller is pushed to audio switch it sends audio signal to audio unit. Then audio signals are supplied
- through audio unit terminals 1, 2, 3, 4, 13, 14, 15 and 16
- to terminals 1 and 2 of driver door speaker and passenger door speaker
- to terminals 1 and 2 of rear speaker LH and RH
- to terminals 1 and 2 of tweeter driver side and passenger side.

When one of steering wheel audio control switches is pushed to volume up seek up or mode ON resistance in steering switch circuit changes depending on which button is pushed. This will change voltage.

Power is supplied
- from audio unit terminal 22
- through combination switch (spiral cable) terminal 24 and 20
- to steering wheel audio control switch.

Ground is supplied
- from steering wheel audio control switch
- through combination switch (spiral cable) terminal 17 and 31
- to audio unit terminal 25.

When one of steering wheel audio control switches is pushed to volume down seek down or power ON resistance in steering switch circuit changes depending on which button is pushed. This will change voltage.

Power is supplied
- from audio unit terminal 23
- through combination switch (spiral cable) terminal 32 and 16
- to steering wheel audio control switch.

Ground is supplied
- from steering wheel audio control switch
- through combination switch (spiral cable) terminal 17 and 31
- to audio unit terminal 25.

BOSE SYSTEM

Refer to Owners Manual for audio system operating instructions.

Power is supplied at all times
- through 15 A fuse [No.37 located in the fuse and fusible link box]
- to audio unit terminal 6 and
- to BOSE speaker amp. terminal 1.

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 10.

Ground is supplied through the case of the audio unit.

Ground is also supplied
- to BOSE speaker amp. terminal 17
- through body ground B5 and B29.

Audio unit and A/C and audio controller are connected by FPC (Flexible Print Circuit).

A/C and audio controller integrates A/C switches and audio switches.

When A/C and audio controller is pushed to audio switch it send audio signal to audio unit.

Then audio signals are supplied
- through audio unit terminals 1, 2, 3, 4, 13, 14, 15 and 16
- to BOSE speaker amp. terminals 23, 24, 25, 26, 27, 28, 29 and 30.

Audio signals are amplified by the BOSE speaker amp.

The amplified audio signals are supplied
- through BOSE speaker amp. terminals 2, 3, 9, 10, 11, 12, 13, 14, 15, 16, 18 and 19
- to terminals 1 and 2 of driver door speaker and passenger door speaker
- to terminals 1 and 2 of rear speaker LH and RH
- to terminals 1 and 2 of tweeter driver side and passenger side
- to terminals 1 and 2 of woofer LH and RH.

When one of steering wheel audio control switches is pushed to volume up seek up or mode ON resistance in steering switch circuit changes depending on which button is pushed. This will change voltage.

Power is supplied
- from audio unit terminal 22
- through combination switch (spiral cable) terminal 24 and 20
- to steering wheel audio control switch.

Ground is supplied
- from steering wheel audio control switch
- through combination switch (spiral cable) terminal 17 and 31
- to audio unit terminal 25.

When one of steering wheel audio control switches is pushed to volume down seek down or power ON resistance in steering switch circuit changes depending on which button is pushed. This will change voltage.

Power is supplied
- from audio unit terminal 23
- through combination switch (spiral cable) terminal 32 and 16
- to steering wheel audio control switch.

Ground is supplied
- from steering wheel audio control switch
- through combination switch (spiral cable) terminal 17 and 31
- to audio unit terminal 25.

SPEED SENSITIVE VOLUME SYSTEM
Volume level of this system gone up and down automatically in proportion to the vehicle speed. And the control level can be selected by the customer. This system is equipped for BOSE system.