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.
2000 Subaru Outback Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Test 8: A/T Control Problem
- Check specifications code on ABSCM/HU. Code is located between hydraulic line connections. See ABSCM/HU IDENTIFICATION table. If ABSCM/HU is not correct for vehicle, replace with correct ABSCM/HU. If ABSCM/HU is correct for vehicle, go to next step.ABSCM/HU IDENTIFICATION
Mark Model C5 AT (Except Outback) C6 MT (Except Outback) CE AT (Outback) CF MT (Outback) - Turn ignition off. Disconnect Transmission Control Module (TCM) connectors. Disconnect ABSCM/HU connector. Measure resistance between ground and ABSCM/HU connector terminal No. 3. See Figure. If resistance is more than one megohm, go to next step. If resistance is less than one megohm, repair wiring harness between TCM and ABSCM/HU.
- Measure voltage between ground and ABSCM/HU connector terminal No. 3. See Figure. If voltage is less than one volt, go to next step. If voltage is more than one volt, repair wiring harness between TCM and ABSCM/HU.
- Turn ignition on. Measure voltage between ground and ABSCM/HU connector terminal No. 3. See Figure. If voltage is less than one volt, go to next step. If voltage is more than one volt, repair wiring harness between TCM and ABSCM/HU.
- Turn ignition off. Reconnect TCM connectors. Turn ignition on. Measure voltage between ground and TCM 24-pin connector terminal No. 19. See Fig 1. If voltage is 10-15 volts, go to next step. If voltage is not 10-15 volts, transmission may not be functioning properly. Repair as necessary. If transmission is functioning properly, replace TCM.
- Measure voltage between ground and ABSCM/HU connector terminals No. 3 and 31. See Figure. If voltage is 10-15 volts, go to next step. If voltage is not 10-15 volts, repair wiring harness between TCM and ABSCM/HU.
- Check contacts at TCM and ABSCM/HU connectors. Clean contacts as needed. Go to next step.
- Turn ignition off. Reconnect all connectors. Erase memory. Recheck for trouble codes. If same trouble code returns, replace ABSCM/HU. If other trouble codes exist, go to proper test procedure. If no trouble codes exist, problem was a temporary poor contact. Recheck harness and connectors.
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.