BOSE SYSTEM
Refer to Owner's Manual for audio system operating instructions.
Power is supplied at all times
through 15A fuse [No. 38, 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 10A 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 B105 and B116.
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 front door speaker LH and RH
to terminals 1 and 2 of rear door speaker LH and RH
to terminals 1 and 2 of tweeter LH and RH.
to terminals 2, 3, 4 and 6 of woofer.
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.
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.
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.