MembersPage/MarcellGal/PowerAndTraction/SpeedoMeter (2010-03-23 15:30:33)

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I plugged in [PS2 wheelspeed cable] to the PS2 connector of my old 3B ECU with (using 2 wires: pin2,3 of 3pin injector connector for the audi transmission side)

Making small vemstune ini change so the descriptor is available (under the GPS group, although this comes from ECU, not from GPS).

Anyone knows the correct setting for the speedsensor calibration for kp/h (I have factory tires on 15" rims) ? Or the number of pulses per wheelrot ?


It would be much easier to mount a round device and display precisely calibrated digital wheelspeed on it, than sorting out this mess around the speedo gauge in the dash.

I'm also thinking of lighting up a "stayaway" light (different color than the red shiftlight) in the speed ranges:

This would help prevent serious speeding while allowing some slight speeding.


[Speedometer]

I found the connector that should go to the transmission speedo output (we already have the backup lights hooked up properly and working ;-)

The 3pin female connector has

My 6 gear audi transmission sensor seems to have a simple reed-switch between pin2-3. It's a passive device, does not need supply on pin1 (with the [PS2 wheelspeed cable] I did not connect any supply).

This matches the [fig09.pdf instrument panel schematic] perfectly.

The speedo sender in the transmission

Maybe I have to hire a car-electrician to disassemble the instrument cluster, and do what [SJM] suggests. I've seen Scrambled Auto Check "OK" display recently, which is another symptom of instrument cluster solder-over-wear (Flash Gordon was there in silver underware).

Frequency signal to the brown-red pin2