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 SEAT Control Module
| Terminal No. | Contents | Measuring condition | Standard | Note |
|---|---|---|---|---|
| (St43) No. 1 | Seat motor drive power supply | Always | 9.0 - 16 V | - |
| (St43) No. 2 | GND | Always | 1 Ξ© or less | - |
| (St43) No. 3 | Slide forward output | When the motor is operated | 9.0 - 16 V | - |
| (St43) No. 4 | Slide rearward output | When the motor is operated | 9.0 - 16 V | - |
| (St43) No. 5 | Lifter UP output | When the motor is operated | 9.0 - 16 V | - |
| (St43) No. 6 | Lifter DOWN output | When the motor is operated | 9.0 - 16 V | - |
| (St43) No. 7 | Slide forward SW input | Switch ON | 1.5 V or less | - |
| (St43) No. 8 | Tilt up SW input | Switch ON | 1.5 V or less | - |
| (St43) No. 9 | Reclining up SW input | Switch ON | 1.5 V or less | - |
| (St43) No. 10 | Lifter up SW input | Switch ON | 1.5 V or less | - |
| (St43) No. 11 | - | - | - | - |
| (St43) No. 12 | - | - | - | - |
| (St43) No. 13 | Slide pulse input | When the motor is operated | Pulse input | - |
| (St43) No. 14 | - | - | - | - |
| (St43) No. 15 | Lifter pulse input | When the motor is operated | Pulse input | - |
| (St43) No. 16 | - | - | - | - |
| (St43) No. 17 | Seat pulse sensor power supply | Always | - | - |
| (St43) No. 18 | Slide rearward SW input | Switch ON | 1.5 V or less | - |
| (St43) No. 19 | Tilt down SW input | Switch ON | 1.5 V or less | - |
| (St43) No. 20 | Reclining backward SW input | Switch ON | 1.5 V or less | - |
| (St43) No. 21 | Lifter down SW input | Switch ON | 1.5 V or less | - |
| (St43) No. 22 | Reclining pulse input | When the motor is operated | Pulse input | - |
| (St43) No. 23 | - | - | - | - |
| (St43) No. 24 | Tilt pulse input | When the motor is operated | Pulse input | - |
| (St43) No. 25 | Seat pulse sensor GND | Always | 1 Ξ© or less | - |
| (St43) No. 26 | - | - | - | - |
| (St42) No. 1 | Tilt UP output | When the motor is operated | 9.0 - 16 V | - |
| (St42) No. 2 | Tilt DOWN output | When the motor is operated | 9.0 - 16 V | - |
| (St42) No. 3 | - | - | - | - |
| (St42) No. 4 | - | - | - | - |
| (St42) No. 5 | Reclining forward output | When the motor is operated | 1.5 V or less | - |
| (St42) No. 6 | Reclining backward output | When the motor is operated | 1.5 V or less | - |
| (St42) No. 7 | - | - | - | - |
| (St42) No. 8 | - | - | - | - |
| (St42) No. 9 | - | - | - | - |
| (St42) No. 10 | - | - | - | - |
| (St42) No. 11 | - | - | - | - |
| (St42) No. 12 | - | - | - | - |
| (St42) No. 13 | - | - | - | - |
| (St42) No. 14 | - | - | - | - |
| (St42) No. 15 | CAN communication Low | - | Cannot be measured | - |
| (St42) No. 16 | CAN communication Hi | - | Cannot be measured | - |
| (St42) No. 17 | - | - | - | - |
| (St42) No. 18 | IGN input | IG ON | 9.0 - 16 V | - |
| (St42) No. 19 | - | Β | Β | - |
| (St42) No. 20 | - | Β | Β | - |
| (St42) No. 21 | GND | Always | 1 Ξ© or less | - |
| (St42) No. 22 | - | Β | - | - |
| (St42) No. 23 | - | Β | - | - |
| (St42) No. 24 | ECM power supply | Always | 9.0 - 16 V | - |
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:
- 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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