aim dash,m880, utc

information about how to make an ECU (MoTeC or non MoTeC) work with a MoTeC dash or data logger

aim dash,m880, utc

Postby nappinj on Tue May 07, 2019 10:08 am

I can use my utc to talk to my m880 or m880 talks to dash but I cannot have both running or both crash.I have m880 with two 2 can lines tied at can inputs and 100 ohm resister at both the dash and utc. any idea's.
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Re: aim dash,m880, utc

Postby David Ferguson on Tue May 07, 2019 3:10 pm

You may have too many terminating resistors. The UTC has a terminating resistor in it, so when plugged it it adds a resistor. Many AIM dashes have built-in terminating resistor (some recent models allow this to be disabled with software), some just have the terminating resistor in the ECU CAN cable (EVO4, XG Log).

Try measuring the resistance across the CAN lines with everything turned off. You can do it at the UTC connector, pins 4 and 5 (which is marked on the connector). If you have 30 ohms or less, you have too much termination, remove some...
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Re: aim dash,m880, utc

Postby nappinj on Fri May 10, 2019 12:43 pm

I had none, then 1. then 2 trying to get it to work.
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Re: aim dash,m880, utc

Postby SDean on Fri May 10, 2019 1:08 pm

Are they all set to the same bus speed?
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Re: aim dash,m880, utc

Postby nappinj on Sun May 12, 2019 9:38 am

thanks for the help, it ended up being wrong ecu selected. it was m8xx-m600-m400-m1-v3 I had m500 selected which is CAN speed I think. but it works
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