Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1994 Subaru Loyale AutomaticFACTORY OEM SERVICE PROCEDURE
Power Circuits (Cranking)
- 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.
- 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
| Application | Wire Color | |
|---|---|---|
| Ignition Off | ||
| Terminal B27 | Black/White | |
| Ignition On | ||
| Terminal B29 | White | |
| Terminal B38 | Red/Blue | |
| Terminal B41 | White | |
| Terminal C49 | Red/Blue | |
| Cranking | ||
| Terminal A18 | Lt. Green/Yellow | |
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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