90CS Quattro V6-2.8L (AAH) (1994)
Keyless Entry: Technical Service Bulletins
Infrared Locking System
Infrared Locking System
Condition
The following condition(s) may exist:
^ Clicking noise (from power window control unit)
^ Battery completely drained
Cause:
Internal malfunction in the bi-pressure pump, P/N ending in the suffix "B".
Repair:
Replace the pump with the latest version pump, 4A0 862 257G (Note: The interior lights and the door unlock feature with the key will work differently
from the original pump. (See Locking Pump Operational Differences.) Should the relay continue to click, it may have been damaged by the previous
pump. Replace the relay.