Quote:
Originally Posted by Croustibat
on S13 and S14, the speed signal goes from the sensor to the cluster, and is then transformed to go to the ECU. If there is no wiring problem, it means the cluster is not able to process the signal sent by the sensor.
Your options are either to get a sensor that fits, or to use a speedo-healer. These devices plug between the sensor and whatever electronics that comes after, and convert common speed / rpm signals into other signals.
If you know someone handy with electronics, he could probably build one for cheaper. You need a µcontroler with an ADC input and DAC/pwm output depending on the signal you want, a voltage regulator and a couple of capacitors.
On s13 and S14, I think the speedo converts the sine wave signal from the sensor to a square signal that goes to the ECU, but this is from the top of my head and maybe i am confusing it with another car, so you need to check this in the FSM, there is a section with diagnostics that will tell you that.
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Thanks for the info it will help others
I found the problem, it turns out wiring speacialities dose Not have a returning wire to send vss signal back to the ecu on the pro rb harness. So I spoke to Yuri the answer to make it work with out voiding warranty is to run a wire to the dash harness yellow / green wire to the aem which in this case I would repin the aem pin 53 and add a pin since its empty spot that should be all. Hope that's helpful if any body else is having this issue