ABS ECU Protection - Ideas

[martinwcox]

I have a blown ABS ECU, probably due to incorrrect shutdown sequence see
http://www.steelsoldiers.com/5-ton-up/90856-blown-abs-ecu-how-not-do-etc.html

So I was thinking of adding a DC-DC converter to power the two feeds to the ECU and therefore adding considerably more and better protection than afforded by the PCB.

You will note that there is a permanent feed as well as a switched feed from the start switch, I have not checked to see if Line #10 is actually live all the time or maybe switched by the PCB.

Anyone with an electrical / electronics background, please feel offer any advice here.

Regards,

Martin.

 

[swbradley1]

If you are looking at keeping the engine shutdown spikes from coming through I would consider using a Zener Diode and determine what you want to regulate it to.

Zener diode - Wikipedia, the free encyclopedia

 

[martinwcox]

I found this on the web, funny it's a company localish to me!

http://www.hdm-sys.com/pdf/hdm_vtp10-24_specs.pdf


I have a call in to the vendor for pricing and a call into Haldex to find out what the current draw is with both valves on (modulating.)

 

[cornrichard]

I looked up 24 volt dc surge protector on e-b the auction that cannot be named. Several items came up. They looked to be adaptable to your unit. I do not have a 900 series truck, so that is as for as I will be looking.

 

[swbradley1]

I found this on the web, funny it's a company localish to me!

http://www.hdm-sys.com/pdf/hdm_vtp10-24_specs.pdf


I have a call in to the vendor for pricing and a call into Haldex to find out what the current draw is with both valves on (modulating.)

That looks like it does the same thing as a Zener only it is already packaged and looks pretty. Good find.

 

[martinwcox]

Well the device I originally found was $150 and only good for 10A, so I found one of these for $50 which I will wire into the supply line from the PCB and protect all the circuits fed from that point, good for 150A load and clamps at 31V.

NORTHERN TECHNOLOGY 24V SURGE PROTECTOR DCB-24SM

 

[swbradley1]

Good find.