CB Custom - Speedo/Tach Wiring Issues

[pekingduck]

PD, going from memory the OEM gear position is just a multi position switch that puts a ground on different lines that will then cause the proper gear position to light. It is effectively a code, but there ya go.

If the new on works like you say, it works pretty much like the GiPro I have.

I will have to look at the manual to see what data goes back and forth on the serial data line. I *think* it is in chapter 5.

As far as the speed sensor IIRC I made a video of the pulse train and put it on youtube. Yep, Here is the link: https://youtu.be/JLJi-v2Ju5A

Here is the thread: http://cb1100forum.com/forum/showthread....eed+sensor

Popgun, yes correct that in all years US CB1100 models use a rotary multi-position switch for gear indicator. 2013 models did not use serial communication line, but had a white/blue wire to ECU marked Warning that likely is for FI light.

Looks like the 2-wire GIPro gear indicator has the same logic as the Daytona to "learn" the parameters for reading rpm curves and speed curves and determining which gear it's in.

And I did see your video on the speed sensor on the scope, perfect 5v DC square wave. Did you use a 2013 speed sensor? And were you able to get any results on a multimeter?

I was using 2014 and 2017 sensors, getting no reaction from any multimeter except milliamps on one. Honda used to recommend a simple "screwdriver" test in their shop manuals, but has been missing for a while.