Audio

AUDIO

System Description

BASE SYSTEM
Refer to Owner's 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 pressed to audio switch, it sends audio signal to audio unit. Then audio signals are supplied
- through audio unit terminals 1, 2, 3, and 4
- to terminals 1 and 2 of front door speaker LH and RH
- to terminals 1 and 2 of tweeter LH and RH,
- through audio unit terminals 13, 14, 15, and 16
- to terminals 1 and 2 of rear door speaker LH and RH.

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

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

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

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

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

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

BOSE SYSTEM
Refer to Owner's 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,
- 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 pressed 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 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 13, 14, 15, and 16
- to terminals 1 and 2 of front door speaker LH and RH
- to terminals 1 and 2 of tweeter LH and RH,
- through BOSE speaker amp. terminals 9, 10, 11, and 12
- to terminals 1 and 2 of rear door speaker LH and RH,
- through BOSE speaker amp. terminals 2, 3, 18 and 19
- to terminals 1 and 2 of woofer LH and RH.

Without Telephone System
When one of steering wheel audio control switches is pressed to volume up seek up or mode ON, the resistance in steering wheel audio control switch circuit changes depending on which button is pressed. This will change the output voltage.

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

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

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

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

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

With Telephone System
When one of steering wheel audio control switches is pressed to volume up, seek up or PTT ON, the resistance in steering wheel audio control switch circuit changes depending on which button is pressed. This will change the output voltage.

Power is supplied
- from audio unit terminal 12
- through combination switch (spiral cable) terminals 24 and 20
- to steering wheel audio control switch.

Ground is supplied
- from steering wheel audio control switch
- through combination switch (spiral cable) terminals 17 and 31
- to audio unit terminal 14.

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

Power is supplied
- from audio unit terminal 13
- through combination switch (spiral cable) terminals 32 and 16
- to steering wheel audio control switch.

Ground is supplied
- from steering wheel audio control switch
- through combination switch (spiral cable) terminals 17 and 31
- to audio unit terminal 14.

SPEED SENSITIVE VOLUME SYSTEM
Volume level of this system goes up and down automatically in proportion to the vehicle speed. And the control level can be selected by the customer.