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roybelding
roybelding, Shop Foreman Freightliner trucks
Category: Medium and Heavy Trucks
Satisfied Customers: 5868
Experience:  Shop Froeman for Freightliner Trucks
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Sid 231-fmi-8. mack, 1998 mack mack mtr, im a repair shop,

Resolved Question:

sid 231-fmi-8. mack
JA: What's the make/model/year of your truck? Engine type?
Customer: 1998 mack mack mtr
JA: Are you fixing your truck yourself? What have you tried so far?
Customer: im a repair shop, we have checked all connections and batteries, also pulled bulk head connectors apart and cleaned,, ecm cam locks are clean no corrosion
JA: Anything else you want the truck mechanic to know before I connect you?
Customer: no
Submitted: 7 months ago.
Category: Medium and Heavy Trucks
Expert:  roybelding replied 7 months ago.

hello, my name is ***** ***** I will be glad to assist you. please allow me a couple of minutes to gather some basic info.

Roy

Expert:  roybelding replied 7 months ago.

SID 231 is a data link fault. There is no specification as to where on that engine.

I'm presuming it is in the VECU on that vehicle since that engine doesn't rely on much for data link connections.

Usually when I get the data link codes, I start checking all my power connections. I then look at the harness for the VECU. 90% of the time, the harness needs to be replaced.

Remove the harness at the ECM and see if there is any corrosion or moisture. If there is moisture, the reservoir tank sensor is bad and the harness needs to be replaced with the ECM as well. VERY common on those model of Macks.

This will not be an easy fix. It will require a lot of harness checking, starting with batteries first.

Expert:  roybelding replied 7 months ago.

also, check the fuse box for corrosion

Roy

Customer: replied 7 months ago.
this is a copy and paste answer I read that already ????
Expert:  roybelding replied 7 months ago.

I figured that when I saw it. I will contact Jeremy and get him to continue

Roy

Expert:  roybelding replied 7 months ago.

I sent him a message

Roy

Customer: replied 7 months ago.
please stop sending me questions about this... you copy and pasted a response to my question and still charged me,,,,,, thats theft !!!!!

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