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Impreza Base, 4D Wagon, Standard Trans
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Repair and Diagnosis
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Fuel Injection System
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Main Relay
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Inspection
Main Relay: Inspection
Check that the main relay has no deformation, cracks or other damages.
Measure the resistance between main relay terminals.
Fig 1: Checking Main Relay Terminals Resistance
Courtesy of SUBARU OF AMERICA, INC.
Terminal No.
Inspection conditions
Standard
3 - 4
Always
1 MΩ or more
3 - 4
Apply battery voltage between terminals 1 and 2.
Less than 1 Ω