sallen959 Posted August 31, 2022 Share Posted August 31, 2022 so i have a 2016 mack mru 613 that is throwing codes for lost communication to turbo and short circuit to ground for the intake air heater relay ive replaced the relay for the intake air heater and problem still exsist,as far as the turbo ive been told its most likely a fuse but i cant seem to find out which one any help or suggestions would be greatly appreciated Quote Link to comment Share on other sites More sharing options...
Mackpro Posted September 1, 2022 Share Posted September 1, 2022 The Mack diagrams are so screwed up I can’t find the fuse number. Do you have a fault code ? The only way I can trace it is through tech tool Quote Link to comment Share on other sites More sharing options...
Mackpro Posted September 1, 2022 Share Posted September 1, 2022 I even pulled the blue prints of the MRU wiring diagram and it doesn’t show it . But from the looks of the diagrams , the air intake heater and turbo actuator are related in wiring Quote Link to comment Share on other sites More sharing options...
sallen959 Posted November 7, 2022 Author Share Posted November 7, 2022 So thanks for the reply’s guys ended up being a shorted out intake air heater . 1 Quote Link to comment Share on other sites More sharing options...
fjh Posted November 9, 2022 Share Posted November 9, 2022 On 11/7/2022 at 2:11 PM, sallen959 said: So thanks for the reply’s guys ended up being a shorted out intake air heater . Thanx for posting your fix! Quote Link to comment Share on other sites More sharing options...
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