2021 Subaru Ascent BaseFACTORY OEM SERVICE PROCEDURE

Main Switch

  1. Measure the resistance between terminals of the switch assembly power window main.

    Preparation tool: 

    Circuit tester

    G12398774Courtesy of SUBARU OF AMERICA, INC.
    • Driver's seat main
    Terminal No. Inspection conditions Standard
    11 - 12 OFF Less than 1 Ω
    7-11
    7 - 12    		 1 MΩ or more
    7-12 Manual UP Less than 1 Ω
    7-11
    11  - 12    		 1 MΩ or more
    7-11 Manual DOWN Less than 1 Ω
    7-12
    11  - 12    		 1 MΩ or more
    • Rear seat remote right (window lock OFF)
    Terminal No. Inspection conditions Standard
    1 - 7
    2  - 7    		 OFF Less than 1 Ω
    7-16 1 MΩ or more
    1 - 16
    2  - 7    		 Manual UP Less than 1 Ω
    1 - 2 1 MΩ or more
    2-16
    1  -7    		 Manual DOWN Less than 1 Ω
    1 - 2 1 MΩ or more
    • Rear seat remote left (window lock OFF)
    Terminal No. Inspection conditions Standard
    9-7
    8  -7    		 OFF Less than 1 Ω
    16-7 1 MΩ or more
    16-9
    8  -7    		 Manual UP Less than 1 Ω
    8-9 1 MΩ or more
    16-8
    9  -7    		 Manual DOWN Less than 1 Ω
    8-9 1 MΩ or more
    • Rear seat remote right (window lock ON)
    Terminal No. Inspection conditions Standard
    1 - 2 OFF Less than 1 Ω
    7-16 1 MΩ or more
    1 - 16 Manual UP Less than 1 Ω
    1- 2
    27-1    		 MΩ or more
    2-16 Manual DOWN Less than 1 Ω
    1 - 2
    17    		 1 MΩ or more
    • Rear seat remote left (window lock ON)
    Terminal No. Inspection conditions Standard
    9 - 8 OFF Less than 1 Ω
    16 - 7 1 MΩ or more
    16 - 9 Manual UP Less than 1 Ω
    8 - 7
    9 - 8    		 1 MΩ or more
    16 - 8 Manual DOWN Less than 1 Ω
    9 - 8
    9 - 7    		 1 MΩ or more
  2. If the inspection result is not within the standard value, replace the switch assembly power window main.
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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.