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Main Relay: Inspection

WARNING: This page is about a different car, the 2012 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check that the main relay has no deformation, cracks or other damages.
  2. Measure the resistance between main relay terminals.
    Fig 1: Measuring Resistance Between Main Relay Terminals
    G07670514Courtesy of SUBARU OF AMERICA, INC.
    RESISTANCE REFERENCE CHART

    Terminal No. Standard
    1 and 2 1 MΩ or more
    3 and 4 130.4 - 230.8 Ω (when 20°C (68°F))
  3. Connect battery positive terminal to terminal No. 3 and battery ground terminal to terminal No. 4, and measure the resistance between the main relay terminals.
    Fig 2: Measuring Resistance Between Main Relay Terminals
    G07670515Courtesy of SUBARU OF AMERICA, INC.
RESISTANCE REFERENCE CHART

Terminal No. Standard
1 and 2 Less than 1 Ω
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