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.
2020 Subaru Outback BaseFACTORY OEM SERVICE PROCEDURE
Power Amplifier
| Terminal No. | Contents | Measuring condition | Standard |
|---|---|---|---|
| (R81) No. 1 ←→ Chassis ground | Backup power supply | Always | Battery voltage |
| (R81) No. 2 | - | - | - |
| (R81) No. 3 ←→ Chassis ground | Ground | Always | 0 V |
| (R81) No. 4 | - | - | - |
| (R81) No. 5 | - | - | - |
| (R81) No. 6 | - | - | - |
| (R81) No. 7 | - | - | - |
| (R81) No. 8 | Woofer (+) | - | - |
| (R81) No. 9 | RH side tweeter (+) | - | - |
| (R81) No. 10 | Instrument panel center speaker (+) | - | - |
| (R81) No. 11 | LH front door speaker (+) | - | - |
| (R81) No. 12 | RH front door speaker (+) | - | - |
| (R81) No. 13 | LH side tweeter (+) | - | - |
| (R81) No. 14 | LH rear door speaker (+) | - | - |
| (R81) No. 15 | RH rear door speaker (+) | - | - |
| (R81) No. 16 | Backup power supply 2 | Always | Battery voltage |
| (R81) No. 17 | - | - | - |
| (R81) No. 18 | Ground 2 | Always | 0 V |
| (R81) No. 19 | - | - | - |
| (R81) No. 20 | - | - | - |
| (R81) No. 21 | - | - | - |
| (R81) No. 22 | - | - | - |
| (R81) No. 23 | Woofer (-) | - | - |
| (R81) No. 24 | RH side tweeter (-) | - | - |
| (R81) No. 25 | Instrument panel center speaker (-) | - | - |
| (R81) No. 26 | LH front door speaker (-) | - | - |
| (R81) No. 27 | RH front door speaker (-) | - | - |
| (R81) No. 28 | LH side tweeter (-) | - | - |
| (R81) No. 29 | LH rear door speaker (-) | - | - |
| (R81) No. 30 | RH rear door speaker (-) | - | - |
| (R82) No. 1 | Mute | - | - |
| (R82) No. 2 | LH main voice input (-) | - | - |
| (R82) No. 3 | LH main voice input (+) | - | - |
| (R82) No. 4 | RH main voice input (-) | - | - |
| (R82) No. 5 | RH main voice input (+) | - | - |
| (R82) No. 6 | Shield ground | - | - |
| (R82) No. 7 | CAN communication (-) | - | - |
| (R82) No. 8 | CAN communication (+) | - | - |
| (R82) No. 9 | - | - | - |
| (R82) No. 10 | - | - | - |
| (R82) No. 11 | - | - | - |
| (R82) No. 12 | ACC power supply | ACC ON | 11 - 15 V |
| (R82) No. 13 | - | - | - |
| (R82) No. 14 | Interrupt voice input (-) | - | - |
| (R82) No. 15 | Interrupt voice input (+) | - | - |
| (R82) No. 16 | - | - | - |
| (R82) No. 17 | - | - | - |
| (R82) No. 18 | Shield ground 2 | - | - |
| (R82) No. 19 | - | - | - |
| (R82) No. 20 | - | - | - |
| (R82) No. 21 | - | - | - |
| (R82) No. 22 | - | - | - |
| (R82) No. 23 | - | - | - |
| (R82) No. 24 | - | - | - |
Factory Service Tools
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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.
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