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.
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HOMESERVICE MANUALSAUDI199590 BASE, 2.8 K, AUTOMATICREPAIR AND DIAGNOSISBRAKESTRACTION CONTROLANTI-LOCK BRAKE SYSTEM/TRACTION CONTROLDTC TESTINGDTC 00645 - LEFT/FRONT EDL OUTLET VALVE
1995 Audi 90 Base, 2.8 K, Automatic
DTC 00645 - Left/Front EDL Outlet Valve
1995 Audi 90 Base, 2.8 K, AutomaticSECTION DTC 00645 - Left/Front EDL Outlet Valve
NOTE:
DTC 00645 applies only to models with Electronic Differential Lock (EDL).
- Fault may be caused by the following;
- Open, short to voltage, or short to ground in the circuits between ABS control module and hydraulic unit.
- Faulty left/front traction control outlet valve.
- Perform steps 6) and 17) of CIRCUIT TEST . If circuit test is inconclusive, ensure related wiring and harness connectors are in good condition. If fault still exists, substitute ABS control module with known good unit. Recheck for symptom and DTC.
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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.