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My autocheck has failed, I think. It has become sure that anything over 3k rpm, my oil pressure is poor (it isn’t, 4.5bar). I tested my old 1.8bar switch, which was faulty. So fitted a new one and it’s exactly the same. Switch is now working.
looking at the wiring, the switch is directly wired to the dash cluster. Anyone else had a similar issue?
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Tom C - www.rcmr.co.uk
Audi UR Quattro
Audi 100 C3 2.0 5 cyl 115ps
Audi S2 - 07k engine project aiming for 800ps
Audi B5 RS4 645ps 911nm
Both switches pull to earth, so start by disconnecting both to see if the problem goes away - if so its the switch.
Next try the two round T8 connectors at the back of the engine bay (the ones in their own bracket on the right with the convoluted boots). Again, disconnect and see if your problem goes away, also check for corrosion etc.
Finally, you can check the interface between the Autocheck and the gauge cluster board - there are several long pins which connect the two when assembled - check there is no corrosion or fur here. You can also take a look on the board for dry solder joints (quite common). If all else fails, the Autocheck unit can have an internal fault - I've never disassembled one but would suspect again a dry solder joint.
HTH
Alex
Panthero Coupé quattro 20vt
Indigo ABY coupé
Imola B6 S4 Avant
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