Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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.
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.