No speed indication after T56 swap
07-05-2016, 08:24 AM
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No speed indication after T56 swap
Hello!
I have made a T56 swap on my Firebird -91 and now I have no speed indication. Both the speedometer and the speed indication in TunerPro are dead. I´m using code 59 in my car.
Now to the questions:
Is it possible to get any speed indication without a "magic box" between the VSS and the ECM?
If it is, is there anybody out there who knows how the settings in Code59 to get it to work?
I guess that one thing could be that the VSS is broken. Is it possible to measure it with an ordinary multimeter? I know it can be done with, for example ABS-sensors, if you know what values you are looking for.
I have searched in a couple of forums but I could not find straight answers to my questions.
*Edit* At least the speedometer is working now (but indicating way to much). The contacts on the VSS were oxidized. Will check in TP later. Ran out of battery in my laptop.
/Johan
I have made a T56 swap on my Firebird -91 and now I have no speed indication. Both the speedometer and the speed indication in TunerPro are dead. I´m using code 59 in my car.
Now to the questions:
Is it possible to get any speed indication without a "magic box" between the VSS and the ECM?
If it is, is there anybody out there who knows how the settings in Code59 to get it to work?
I guess that one thing could be that the VSS is broken. Is it possible to measure it with an ordinary multimeter? I know it can be done with, for example ABS-sensors, if you know what values you are looking for.
I have searched in a couple of forums but I could not find straight answers to my questions.
*Edit* At least the speedometer is working now (but indicating way to much). The contacts on the VSS were oxidized. Will check in TP later. Ran out of battery in my laptop.
/Johan
Last edited by joster; 07-05-2016 at 11:16 AM.
07-05-2016, 02:46 PM
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Re: No speed indication after T56 swap
*Update*
After changing the "Road Speed Sensor Constant" to 40000 the speed indication in TP seems to be somewhat correct.
The speedo is still way off. It indicates 240 km/h (i live in Sweden) when TP indicates about 15MPH. To fix this I tried to use "Road speed IP Pulse Divisor" flags. Unfortunately this flags does not affect the speedo at all.
Is there something that I´m missing here?
/Johan
After changing the "Road Speed Sensor Constant" to 40000 the speed indication in TP seems to be somewhat correct.
The speedo is still way off. It indicates 240 km/h (i live in Sweden) when TP indicates about 15MPH. To fix this I tried to use "Road speed IP Pulse Divisor" flags. Unfortunately this flags does not affect the speedo at all.
Is there something that I´m missing here?
/Johan
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