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 Forester BaseFACTORY OEM SERVICE PROCEDURE
Driver Monitoring Unit
| Terminal No. | Contents | Measuring condition | Standard |
|---|---|---|---|
| (i347) No. 1 ←→ Chassis ground | Battery power supply | Always | 11 - 14 V |
| (i347) No. 2 | - | - | - |
| (i347) No. 3 | - | - | - |
| (i347) No. 4 ←→ Chassis ground | CAN H | IG ON | Pulse generation |
| (i347) No. 5 ←→ Chassis ground | Driver Monitoring System OFF Switch |
|
|
| (i347) No. 6 | - | - | - |
| (i347) No. 7 ←→ Chassis ground | GND | Always | 0 V |
| (i347) No. 8 ←→ Chassis ground | CAN L | IG ON | Pulse generation |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.