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.
2021 Subaru Ascent BaseFACTORY OEM SERVICE PROCEDURE
Control Unit: Note
System control of the EyeSight is performed by each module. For procedure, refer to the following service information.
- Engine control module (ECM): Ref. to FUEL INJECTION (FUEL SYSTEMS) (H4DOTC)>ENGINE CONTROL MODULE (ECM) .
- Transmission control module (TCM): Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR690)>TRANSMISSION CONTROL MODULE (TCM) .
- VDC control module & hydraulic control unit (VDCCM&H/U): Ref. to VEHICLE DYNAMICS CONTROL (VDC)>VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) .
- Stereo camera: Ref. to EYESIGHT>STEREO CAMERA .
- Power steering control module: Ref. to POWER ASSISTED SYSTEM (POWER STEERING)>POWER STEERING CONTROL MODULE .
- Body integrated unit: Ref. to SECURITY AND LOCKS>BODY INTEGRATED UNIT .
- Reverse Automatic Braking Control Module: Ref. to REVERSE ASSIST BRAKING>REVERSE ASSIST BRAKING CONTROL MODULE .
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.