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Author Topic: Monaco acumen all computers fail  (Read 268 times)


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Monaco acumen all computers fail
« on: August 01, 2017, 08:39:31 AM »
Getting ready to make a 500 mile trip and I go to start coach and cranks but will not start. our technician checks with diagnostic computer and states there is no communication we replaced ecm , then transfer switch is not switching so we replaced transfer switch both new ecm and transfer switch have resolved no start and failed switching but now trans will not go into high gear ???? Checked tcm it was also bad now we can communicate with tcm via ecm perfect now diagnostic computer is saying no speed sensor detected ???? Help not sure what happened to coach or where to go from here

Gary RV_Wizard

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Re: Monaco acumen all computers fail
« Reply #1 on: August 01, 2017, 11:13:47 AM »
I don't see how the transfer switch could relate to an engine no start or a transmission shifting issue, but that is fixed so maybe not worth pursuing.

A loss of speed sensor input would indeed prevent proper sifting, but it could be a broken or corroded wire rather than a failed sensor. A competent chassis tech ought to be able to figure that out easily enough. Are they having trouble locating that?   I'm not clear on what help you are looking for from this forum.
Gary Brinck
Summers: Black Mountain, NC
Home: Ocala National Forest, FL

Arch Hoagland

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Re: Monaco acumen all computers fail
« Reply #2 on: August 01, 2017, 06:54:57 PM »
Year, make and model may help.

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2004 Monaco La Palma 36 DBD
W22, 8.1 gas,  Allison 1000 Transmission
7.1 MPG over 90,000 miles

2000 Lexus RX300, 4020lb
U.S. Gear Braking System