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2014 mack cxu 613 mp8 with m drive will not crank has acc no…

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2014 mack cxu 613 mp8...
2014 mack cxu 613 mp8 with m drive will not crank has acc no data on information screen in dash and gear selector has ** instead of n1 truck has lots of codes active when not cranking,tow truck in it will crank when unhooked 2 times this has happened where should we start at
Submitted: 5 years ago.Category: Medium and Heavy Trucks
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Answered in 10 minutes by:
4/28/2017
Technician: Daniel Wilson,
 replied 5 years ago
Daniel Wilson
Category: Medium and Heavy Trucks
Satisfied Customers: 15,122
Experience: Owner at DJ Wilson
Verified

Hi Randy, It looks like you have a lot of data link and communication faults. Take a close look at the wiring harness and connector pins and confirm your power and grounds to the ECU and control modules. sounds like either a loss of power or ground to the modules or a poor connection in the wiring harness. Start there and let me know the results.

If the wiring tests good and a wiggle test does not effect the results, your power and grounds are good, the next step is try a reflash and update in the software and if unsuccessful you may have a failed module itself.

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Daniel Wilson
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Daniel Wilson
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Satisfied Customers: 15,122
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