Coding the cluster for Can-bus yields unresponsive pedal, slow to rev

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ddillenger

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	Coding the cluster for Can-bus yields unresponsive pedal, slow to rev « on: July 16, 2013, 08:22:38 PM »

What's happening in the ecu that causes this? Code the cluster for Can (me7.1.1 ecu in me7.1 car) and the car is lethargic. Pedal is unresponsive, everything's slow. Code it back to non-can and it wakes up. I'd like to know why?


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UrbanAssaultar

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	Re: Re: Coding the cluster for Can-bus yields unresponsive pedal, slow to rev « Reply #1 on: July 16, 2013, 08:39:52 PM »

Something on the CAN line is sending a dominant message to take priority before engine control....maybe ABS/ESP? I see this on the trucks I work on which are riddled with J1939 and J1587 data link, sometimes the gauges are slow to respond, sometimes what you're experiencing happens.


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ddillenger

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	Re: Coding the cluster for Can-bus yields unresponsive pedal, slow to rev « Reply #2 on: July 16, 2013, 09:18:50 PM »

It just retardifies itself. Mash the gas quick, nothing happens. It's like the car's stoned honestly.

With Can-disabled I don't think the ecu gets a VSS signal as it throws a code intermittently and redline was lowered from 7200 to 6000. I increased NMAXDV to compensate, but I'd like to get this sorted properly.


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ddillenger

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	Re: Coding the cluster for Can-bus yields unresponsive pedal, slow to rev « Reply #3 on: July 21, 2013, 11:05:55 AM »

At the suggest of another member I ran the VSS fron the ecu to the cluster separate of the CAN-bus. Now I can run it without the VSS fault, but I'm still curious WHAT coding the cluster to CAN has on the calibration.


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Carsinc

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	Re: Coding the cluster for Can-bus yields unresponsive pedal, slow to rev « Reply #4 on: July 22, 2013, 07:56:37 AM »

I won't be able to help with that, but I'm glad you got vss now. Wink


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