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.
Premium System: Notes
Refer to Owner's Manual for audio system operating instructions.
Power is supplied at all times
- through 15A fuse [No. 17, located in the fuse block (J/B)]
- to audio amp. terminal 17
- through 20A fuse [No. 31, located in the fuse and fusible link box]
- to audio unit terminal 6
- to audio amp. terminal 1
- to AV switch terminal 1 and
- to display control unit terminal 1 (with NAVI).
With the ignition switch in the ACC or ON position, power is supplied
- through 10A fuse [No. 4, located in the fuse block (J/B)]
- to audio unit terminal 10 and
- to AV switch terminal 2 and
- to display control unit terminal 10 (with NAVI).
With the ignition switch in the ON or START position, power is supplied
- through 10A fuse [No. 12, located in the fuse block (J/B)]
- to display control unit terminal 12 (with NAVI).
Ground is supplied through the case of the audio unit.
Ground is also supplied
- to audio amp. terminals 4, 20
- to AV switch terminal 5 and
- to display unit terminal 1 (with NAVI) and
- to display control unit terminal 3 (with NAVI)
- through body grounds M57, M61 and M79.
Then audio signals are supplied
- through audio unit terminals 1, 2, 3, 4, 13,14, 15 and 16
- to audio amp. terminals 5, 6, 7, 8, 21, 22, 23 and 24.
Audio signals are amplified by the audio amp.
The amplified audio signals are supplied
- through audio amp. terminals 2, 3, 10, 11, 12, 13, 14, 15, 16, 18, 19, 26, 27, 28, 29, 30, 31 and 32 and
- to terminals + and - of front door speaker LH and RH and
- to terminals + and - of front tweeter LH and RH and
- to terminals + and - of center speaker and
- to terminals + and - of rear door speaker LH and RH and
- to terminals + and - of rear door tweeter LH and RH (crew cab) and
- to terminals 1, 2, 3 and 4 of subwoofer.
When one of steering wheel audio control switches is pushed, the resistance in steering switch circuit changes depending on which button is pushed.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.
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