Ok, just checked internals of K40, nothing unusual. I had previously soldered a bad joint, still looked good. I put K40 back in the car and placed a 20A fuse in the F2 slot. Hooked battery up, started car and BAS /ASR light stayed on, no SC engagement. I did the same yesterday and fuse didn't blow until later. Today it was immediate with the 20A fuse..... I have searched and searched the threads for more info on the F2 fuse. I found something yesterday but not today...UGH. I really need some help here PLEASE!
The bas/asr light can be taken care of by turning the steering wheel full lock to full lock left and right. The blowing fuse, I can't help you with..good luck
Jeff
I checked the Vent/Purge valve solenoid, it has zero resistance, wonder if it is causing the short? P0443 and P0446 point towards it. Figure I might start there, unless you suggest something different. What and where is the pump switchover valve, same thing? I will wait to hear from you or others.
a few codes there but they all look like they point to emissions system!
Auxiliary Emissions Controls Codes
P0443 - Evaporative Emission Control System Purge Control Valve Circuit
P0446 - Evaporative Emission Control System Vent Control Circuit
MB Specific Codes - Fuel & Air Metering
P1235 - Air-flap recirculated signal output stage faulty
P1236 - A/C compressor output stage, magentic combination incorrect
MB Specific Codes - Vehical Speed, Idle Control, and Auxiliary Inputs
P1525 - Right or sole adjustable camshaft timing solenoid electricly faulty
attached is the diagram of the r170 system (m111 motor 4cyl). the air-pump is on cars with stricter emissions and its near the supercharger.
air pump = Y32 on diagram
purge valve = Y58/1 on diagram
vent valve = 76 on diagram
also check the cam advance magnet under as they tend to leak oil when they go bust and can wick up oil up the loom (can find threads on this)...
as for checking diagnostics ill sus out WIS a bit deeper later... reset the codes and run the car for a few days and see which ones re-apear the more serious ones will re-appear almost immediatly. some of the above could have been once offs...
Subby, I have checked camshaft sensor/magnet and it was a little dirty, but no oil. Do you feel I should start with the purge solenoid, since it shows no resistance or somewhere else? Thanks!
If you could swap one over to see if any codes come back? i measured my purge solenoid before and it read 50 Ohms. im not sure how much voltage they run on (could measure the voltage on the electrical connector) and take the valve out and apply voltage to it to see if it clicks or makes any noise?
I ended up replacing the K-40 unit. Got it retail from the local MB dealer. It solved a lot of problems I was having.
Bazzle has some excellent photos of the procedure and printed instructions.
Check out his threads on the K-40.
Bazzle is a genius !
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