Mercedes Benz W126 560SEL 3/89 Testing & Overhaul of Electrical System and All Control Units Part 3

Part 3 of this Series deals with the Idle Speed Control Unit and which turned out to be a genuine Mercedes Benz Part with a manufacturing of week 8 in 1989 and the ASIC unit, in SMD style made by SEL in Stuttgart Zuffenhausen next to the Porsche Factory, in week 7 of 1989
I am certain the replacement of the 3 Electrolytic Capacitors will improve the idle but I can’t tell you by how much yet.
Remember when ever the power (Battery) is removed, both the Idle Speed Control Unit and the ECU are going to be in “Learn” Mode for the next 40 starts which includes driving.
During this learn period the car can shift hard, idle rough and run to rich until the learning has been completed
I will post an update after 50 starts - I will also not pull the ECU until after this learning so we properly evaluate the Recapped Units.
I will also replace the air flow potentiometer when recapping the ECU
I will post a separate video on the air flow potentiometer

[@r3FMusic]

i have a similar problem. the video is good.
but the part number on me is different.
There are 3 injured capacitors in the piece I have.
After replacement, which pin ends can I give volts to this part and test?
part number; 001 545 90 05 (Kaltstart Steuerung) total number of pins, 8

[@inovahightechltd]

Hi Refik,
Which model and year do you have?
One of my additional problems I had was the old voltage regulator on the alternator. It was just worn out, the brushes too short just about to fail.

[@inovahightechltd]

Refik,
There should be numbers and letters next to the PIN ie. 30, 31, 15, 87, 87H, TD, TF etc - post those you got on your 90 05 and I will let you know A

[@r3FMusic]

@@inovahightechltd W124 200E M102.963 (124.021) 08/89) 122HP
the overcurrent protection relay delivers the appropriate voltages (12 volt input, output 14 volts!) but it is not the relay it should be. "201 540 08 45" looks like this in the EPC, but I suspect this part is on my vehicle "201 540 32 45". Do I need to replace it after the repair so that it doesn't get damaged again?

[@inovahightechltd]

@@r3FMusic I do not have the wiring diagram for this car or the relay

[@inovahightechltd]

@@r3FMusic please post the numbers and letters for the pins