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Post Info TOPIC: A/B Map select feature


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A/B Map select feature

The Hayabusa ECU has dublicate fuel and ignition maps. As it comes from the factory both sets of maps are the same, however it would be easy to program two different maps to add flexiablility. The most obvious example would be for a bike with NOS which could have a map for on NOS and off NOS.

I've found that the Map A/B selection depends on a Port pin input. PortB bit 4 to be exact. I haven't traced it down to an ECU connector pin or wire harness wire yet. The other thing I found out is that it is switchable on the fly. Port is scanned and the map select flag updated in the main loop once every ~400mS.

Not a great response time but better than the ZX-12 which only reads the port once when the key is first turned on.

I'll post more when I know more about the physical connection to the portB pin.

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