I doubt that the ESS TS2 is able to provide a modified fuel injection pulse signal to the OBC so that it could accurately calculate MPG, but I thought that I would ask. Anyone know? I'ld e-mail ESS, but I suspect that others would want to know as well.
The reason I want an OBC that functions properly is the reason I want an ESS TS; keep the vehicle looking and operating like stock.
I'd be interested in this as well. I think I've been told that some models can have the OBC recalibrated to be more accurate but I'm not sure of the procedure or which cars this applies to.
The OBC can be recalibrated using INPA quite easily. We typically do it on local installations. There is also a way of adjusting it directly through the instrument cluster menu.
As AJ said, there is an easier way of just using software to fixed it than using hardware and cutting wires in your engine. Thank you for your suggestion.
Looking through the WDS the OBC doesn't have a discrete fuel consumption signal wire, it is computed by the cluster directly from data off the CAN bus.
If that is the case, the ONLY way to correct would be through software.
The correction factor is in the instrument cluster, not the OBC. So using what you said, I am trying to change how the instrument cluster calculates the data off the CAN bus to display to the driver. What am I missing here?
In any case, I'll try this when I get my car back. Although I do have INPA to try it with if this doesn't work.
I think fuel consumpton is calculated in litres per 100 km and then converted to miles per gallon.
So in order to get the miles per gallon down, the litres per 100 km have to go up.
I haven't found anything I can do. I would really like my OBC to function as designed; I'm willing to pay for the option, but can't find a way to do it. It's one of the unadvertised trade-offs you have to put up with when you go FI.
Nothing. The avg mpg and mte readouts are nice but not essential and I really don't use them anyway so I haven't taken the time to explore the correction factor mentioned above.
If the correction factor isn't available in the instrument cluster like it is in other BMW models then I guess the only option is making an adjustment in the DME, but as AJ points out, with MS45 DME's this can be risky or down-right buggy.
I believe the hardware solution mentioned in early threads (the seatlecircuit) would work.
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