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Home >> Subaru >> 2018 >> Outback 2.5i Limited >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control/Fuel System (H4DO) >> Main Relay >> Inspection

Main Relay: Inspection

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  1. Check that the main relay has no deformation, cracks or other damages.
  2. Measure the resistance between main relay terminals.
    G10263639Courtesy of SUBARU OF AMERICA, INC.
    Terminal No. Standard
    1 and 3 1 MΩ or more
    2 and 4 80.55 - 98.45 Ω (when 20°C (68°F))
  3. Connect battery positive terminal to terminal No. 2 and battery ground terminal to terminal No. 4, and measure the resistance between the main relay terminals.
    G10262212Courtesy of SUBARU OF AMERICA, INC.
    Terminal No. Standard
    1 and 3 Less than 1 Ω