VSS aftermarket sensor brantz rally meters BR3

[Elpizer2]

Hi guys

I have a brantz rally meters BR3 sensor.

Appartently it's something that you can fit before the oem vss cable and have a digital output but I don't know how to connect it to the ecu.

It says 4 pulses per revolution ( 20mA sink capability )

PDF Instructions here

https://www.2racing.cz/fotky55658/Brantz/manual/BR3-SQ_manual.pdf

You must be logged in to view this image or video.

You must be logged in to view this image or video.

You must be logged in to view this image or video.

You must be logged in to view this image or video.

 

[danl]

Your car has 5v sensor power and sensor ground. You need to ask the company which color wire is sensor power and which one is sensor ground. The instructions don’t tell you that information. Finally the last wire will be your sink output that goes to the ecu VSS input.

 

[Elpizer2]

Apparently is

Red power
Black ground
White output to ECU

My question is where do I get the 5v power and which ground? Sensor ground from ECU directly?

Your car has 5v sensor power and sensor ground. You need to ask the company which color wire is sensor power and which one is sensor ground. The instructions don’t tell you that information. Finally the last wire will be your sink output that goes to the ecu VSS input.

 

[DSMPT]

What's the reason you want to use it? ECU doesn't receive the signal?
Just connect a switched 12v, ground and the signal to ECU (depin or cut the wire from the reed switch to ECU). Do not use a constant 12v as a power supply for the sensor like running a wire from the battery directly, especially if you have AEM EMS. I think it should be fine if it's V1 but if it's V2, you would have an issue if the sensor sees a constant 12v.

 

[Elpizer2]

I am running AEM v1. The problem is that the VSS signal is very bad, it reads like 10mph and then 255mph. I want to use that sensor for a better signal I mean boost control etc

What's the reason you want to use it? ECU doesn't receive the signal?
Just connect a switched 12v, ground and the signal to ECU (depin or cut the wire from the reed switch to ECU). Do not use a constant 12v as a power supply for the sensor like running a wire from the battery directly, especially if you have AEM EMS. I think it should be fine if it's V1 but if it's V2, you would have an issue if the sensor sees a constant 12v.

Ok this is the answer from the manufacture in the picture below, however I am confused about the signal. What does it mean 4 pulses per revolution? 20mA sink capability? How does that works?

You must be logged in to view this image or video.

 

[DSMPT]

The problem is that the VSS signal is very bad, it reads like 10mph and then 255mph

If the speedometer is showing the correct speed but ECU is showing it incorrectly or unstably, then the reed switch or wiring/connection may have gone bad, or it's the common AEM EMS issue that the reed switch doesn't work well with AEM EMS.
4 pulses is the same as many JDM cars. Just install it and select the VSS as 2G DSM or so in the wizard in AEMPro software. It should work.

 

[Brandon Mau]

If the speedometer is showing the correct speed but ECU is showing it incorrectly or unstably, then the reed switch or wiring/connection may have gone bad, or it's the common AEM EMS issue that the reed switch doesn't work well with AEM EMS.
4 pulses is the same as many JDM cars. Just install it and select the VSS as 2G DSM or so in the wizard in AEMPro software. It should work.

DSMPT is correct. I put this sensor on my car back in 2017/18 with AEM because it didn’t work with the 1G OEM reed signal. I just tapped into a 5volt supply for mine and I’m still using that sensor with my fueltech ecu no issues reading.