Mss54 s54 swap speed signal

[BMWfanz]

Hi guys! Currently having a problem that ECU doesn't see signal , I've changed speed signal bit in my map and changed digital signal to analog one. So now I need to wire signal from dashboard/diff to same pin for speed signal or I need special decoder because s54 z3m sees this signal from ABS module?

[nando]

just use the output from the back of the cluster. That's what those code changes are for. in fact the stock E30 DME gets a VSS signal, it's right in the C101.

[BMWfanz]

just use the output from the back of the cluster. That's what those code changes are for. in fact the stock E30 DME gets a VSS signal, it's right in the C101.

Is there any calibration maps available in ECU? I've connected signal from instrument cluster and there is a signal i can see in INPA diagnostic but wrong values- for example 40 km/h- 3 km/h in ECU- 65 km/h- 5 in ECU

[BMWfanz]

just use the output from the back of the cluster. That's what those code changes are for. in fact the stock E30 DME gets a VSS signal, it's right in the C101.

Is there any calibration maps available in ECU? I've connected signal from instrument cluster and there is a signal i can see in INPA diagnostic but wrong values- for example 40 km/h- 3 km/h in ECU- 65 km/h- 5 in ECU

[nando]

yeah, I'll have to look it up - there's a 'k factor' value you can scale to get the right speed.

[BMWfanz]

yeah, I'll have to look it up - there's a 'k factor' value you can scale to get the right speed.

Nando can u help me with it? Or its needed to be online when calibrated? Im from almaty and I have fully downloaded ecu flash

[R3Z3N]

Calculation: Pulses/KM
E30 9 Pulses/Rotation

So: Tire Rotations/KM*9