1993 Subaru Justy BaseFACTORY OEM SERVICE PROCEDURE

Power Circuits (Cranking)

  1. Using voltmeter, backprobe appropriate ECU terminal. See ECU POWER TERMINAL IDENTIFICATION table. Hold ignition switch in START position. Battery voltage should exist between ECU terminal and ground only when ignition switch is in START position.
  2. If battery voltage does not exist, check fusible link. Fusible links are in engine compartment. If fusible link is okay, check for open wire between fusible link and ECU terminal, or for defective ignition switch. See WIRING DIAGRAMS article.
ECU POWER TERMINAL IDENTIFICATION

Terminal No. Ignition Switch Position Wire Color
Impreza
Terminal A26 Off Yellow/Red
Terminal A10 On Yellow
Terminal A13 On Yellow/Green
Terminal A12 Cranking Red/Yellow
Justy
Terminal A2 Ignition Off White/Blue
Terminal A1 Ignition On Red
Terminal A12 Ignition On Red
Terminal A17 Cranking Black/White
Legacy
Terminal A15 Ignition Off Yellow/Red
Terminal A2 Ignition On Yellow/Red
Terminal A13 Ignition On Yellow/Red
Terminal B12 Ignition On Yellow
Terminal B10 Cranking Light Green/Yellow
Loyale
Terminal B27 Ignition Off Black/White
Terminal B29 Ignition On White
Terminal B38 Ignition On Red/Blue
Terminal B41 Ignition On White
Terminal C49 Ignition On Red/Blue
Terminal A18 Cranking Lt. Green/Yellow
SVX
Terminal A2 Ignition On White/Red
Terminal A13 Ignition On White/Red
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.

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