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.
1993 Subaru SVXFACTORY OEM SERVICE PROCEDURE
Code 38: Engine Torque Control
NOTE:
Refer to illustration for ECU connector and terminal identification. See Figure
.
- Turn ignition switch to ON position. Using a DVOM, check voltage between ECU connector B59, terminal No. 20 (backprobe) and ground. Voltage should be 5 volts or greater. If voltage is not as specified, go to next step. If voltage is as specified, check ECU connector terminals for good contact. Repair as necessary. If connector terminals are okay, replace ECU.
- Turn ignition switch to OFF position. Disconnect ECU and transaxle control unit (TCU) connectors. Using an ohmmeter, check resistance between ECU connector B59, terminal No. 20 and TCU connector terminal No. 16 (Light Green/Yellow wire). Resistance should be zero ohms. If resistance is not as specified, repair circuit as necessary. If resistance is as specified, check TCU connector terminals for good contact. Repair as necessary. If connector terminals are okay, replace TCU.
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.