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 Ascent BaseFACTORY OEM SERVICE PROCEDURE
Power rear gate Control Module
| Terminal No. | Contents | Measuring condition | Standard |
|---|---|---|---|
| (R422) No. 1 ← → Chassis ground | Touch sensor | When sensor is ON | 2.7 V or less |
| (R422) No. 2 | - | - | - |
| (R422) No. 3 ← → Chassis ground | Latch switch | When rear gate is fully closed | 9 - 16 V |
| (R422) No. 4 ← → Chassis ground | Courtesy switch | When rear gate is fully closed | 9 - 16 V |
| (R422) No. 5 ← → Chassis ground | Sector switch | When rear gate is fully closed | Less than 1 V |
| (R422) No. 6 ← → Chassis ground | PRG inner SW | When power rear gate inner switch is ON | Less than 1 V |
| (R422) No. 7 | - | - | - |
| (R422) No. 8 ← → Chassis ground | Memory height switch | When memory height switch is ON | less than 1 V |
| (R422) No. 9 | - | - | - |
| (R422) No. 10 | - | - | - |
| (R422) No. 11 | - | - | - |
| (R422) No. 12 | - | - | - |
| (R422) No. 13 ← → Chassis ground | Power rear gate driver's switch | When driver's switch is ON | Less than 1 V |
| (R422) No. 14 ← → Chassis ground | LIN communication line | - | - |
| (R422) No. 15 ← → Chassis ground | Hazard output | When hazard is not operating | Less than 1 V |
| (R422) No. 16 ← → Chassis ground | Ignition SW | When ignition SW is ON | - |
| (R423) No. 1 ← → Chassis ground | Battery power supply (+POWER B) | Always | 9 - 16 V |
| (R423) No. 2 ← → Chassis ground | Closer (CLOSE) | When power rear gate auto closer is in pull-in operation | 9 - 16 V |
| (R423) No. 3 ← → Chassis ground | Closer (OPEN) | When power rear gate auto closer is performing the release operation | 9 - 16 V |
| (R423) No. 4 ← → Chassis ground | GND | Always | Less than 1 Q |
| (R423) No. 5 | - | - | - |
| (R423) No. 6 ← → Chassis ground | Battery power supply (+B) | Always | 9 - 16 V |
| (R424) No. 1 | - | - | - |
| (R424) No. 2 | - | - | - |
| (R424) No. 3 ← → Chassis ground | Motor (CLOSE) | When auto-closing is in operation | Pulse |
| (R424) No. 4 ← → Chassis ground | Motor (OPEN) | When auto-open is in operation | Pulse |
| (R424) No. 5 | Buzzer (-) | ||
| (R424) No. 6 ← → (R424) No. 5 | Buzzer (+) | When buzzer sounds | Pulse |
| (R424) No. 7 | - | - | - |
| (R424) No. 8 ← → Chassis ground | HALL RETURN | - | - |
| (R424) No. 9 ← → (R424) No. 8 | HALL2 | - | - |
| (R424) No. 10 ← → (R424) No. 8 | HALL1 | - | - |
| (R424) No. 11 ← → Chassis ground | HALL FEED | - | - |
| (R424) No. 12 | - | - | - |
| (R424) No. 13 | - | - | - |
| (R424) No. 14 | - | - | - |
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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