Oil in harness/ECU - why no ECU end solution?
Thread Starter
Newbie
Joined: Nov 2014
Posts: 13
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From: Sydney
CLS63S
Oil in harness/ECU - why no ECU end solution?
I have checked and replaced the 4 x cam sensors on a 2015 CLS63S. Luckily no leaks. I also checked the ECU to be sure, and its all good. No oil.
I can see that there are solutions out there such as the Mercedes Camshaft Solenoid Harness - Genuine Mercedes p/n 2711500156.
I wondered if anyone had come across a solution for the ECU end. It would seem to me to be the way you could 100% avoid getting oil in there even if it got into the wiring.
Cheers....
I can see that there are solutions out there such as the Mercedes Camshaft Solenoid Harness - Genuine Mercedes p/n 2711500156.
I wondered if anyone had come across a solution for the ECU end. It would seem to me to be the way you could 100% avoid getting oil in there even if it got into the wiring.
Cheers....
Out Of Control!!
Joined: Sep 2018
Posts: 14,692
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From: unbegrenzt
2017 GLE350 4MATIC
I have checked and replaced the 4 x cam sensors on a 2015 CLS63S. Luckily no leaks. I also checked the ECU to be sure, and its all good. No oil.
I can see that there are solutions out there such as the Mercedes Camshaft Solenoid Harness - Genuine Mercedes p/n 2711500156.
I wondered if anyone had come across a solution for the ECU end. It would seem to me to be the way you could 100% avoid getting oil in there even if it got into the wiring.
Cheers....
I can see that there are solutions out there such as the Mercedes Camshaft Solenoid Harness - Genuine Mercedes p/n 2711500156.
I wondered if anyone had come across a solution for the ECU end. It would seem to me to be the way you could 100% avoid getting oil in there even if it got into the wiring.
Cheers....
The root cause and source of the leaks is the cam sensors and magnets. Oil compromises those connectors, far from the ECU, and intermittently insulates the contacts. A downstream mitigation solution at the ECU would not solve intermittent connection at the oil-compromised magnets and sensors.
It’s not about protecting the ECU but rather eliminating the leak and resulting intermittent connectivity.
Thread Starter
Newbie
Joined: Nov 2014
Posts: 13
Likes: 1
From: Sydney
CLS63S
It wouldn’t help.
The root cause and source of the leaks is the cam sensors and magnets. Oil compromises those connectors, far from the ECU, and intermittently insulates the contacts. A downstream mitigation solution at the ECU would not solve intermittent connection at the oil-compromised magnets and sensors.
It’s not about protecting the ECU but rather eliminating the leak and resulting intermittent connectivity.
The root cause and source of the leaks is the cam sensors and magnets. Oil compromises those connectors, far from the ECU, and intermittently insulates the contacts. A downstream mitigation solution at the ECU would not solve intermittent connection at the oil-compromised magnets and sensors.
It’s not about protecting the ECU but rather eliminating the leak and resulting intermittent connectivity.
Out Of Control!!
Joined: Sep 2018
Posts: 14,692
Likes: 4,584
From: unbegrenzt
2017 GLE350 4MATIC
Thanks for taking the time to respond to my question. I had thought that the cause of the problems was oil in the ECU. You are saying that it is also the oil intermittently insulating the cam sensor contacts? My worry would be that if there was oil in the connectors and the sensors were replaced, would the oil not continue to travel up to the ECU? Hence my thinking over a solution at both ends.
The root cause is failed (compromised) cam sensors and magnets. Everything else on this topic follows from failed sensors and magnets.
In extreme examples oil can appear at fuel injector and O2 sensor connectors, in addition to the ECU pins.
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Joined: Apr 2021
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From: San Jose, CA
11 E550, 16 AMG GTS, 13 S550
you can wash the oil out of the harness w/ spray but usually the oil just shorts the connector end of it and thats really as far as it typically goes. If it wicks up to the ecu, youre gonna have a bad time but I've yet to see it I just know its possible.
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Alpha European Autotech
Purchase Amsoil at 25% off from me
Chris Tran, Retired Alpha European Autotech Owner
Amsoil Independent Dealer #7236674
