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.
1988 Audi 5000 CS, AutomaticFACTORY OEM SERVICE PROCEDURE
Trouble Shooting Trouble Code Memory
- If trouble code light does not illuminate with ignition on, check wiring between ICU connector terminal No. 3 and FICU connector terminal No. 13. If wiring checks good, connect LED Tester (US 1115 ) between FICU connector terminals No. 13 and No. 14 using a jumper wire.
- Each time ignition is turned on, tester must blink 3 times. If tester does not blink 3 times, replace ICU.
NOTE:
If ICU is replaced, check ignition timing. If trouble code warning light blinks while driving, knock regulation is at maximum control limit.
Factory Service Tools
Use the Manual With the Right Hardware
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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.