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ABS sensors for digital inputs for Porsche 928


928sg

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I'm adding this here, because I posted on Facebook but that is a horrible place to keep technical info because searching for stuff even a few weeks old is difficult.

I asked:
what is the consensus on using the ABS sensors for traction control? ECU is Link Thunder, and it would be preferable to not interfere with the ABS system.

Adamw: The Thunder differential DI’s 11-16 are specifically designed for tapping into ABS signals without upsetting the ABS. Assuming they are common VR or hall sensors (not magnetoresistive)

me:  Front ABS sensor is the same as the Porsche 944 and 968. This is for a Porsche 928. They have a metal shell on them which on the below link indicates they are passive. https://www.apecbraking.co.uk/.../Techni.../ABS-Sensors.aspx

Adamw: The 928 Front sensors will be VR

Me: rear abs sensors are the same as front just different wire lengths https://www.boschautoparts.com/en/auto/adas/wheel-speed-sensor?partID=0265001118&fbclid=IwAR1GqYZhpppJI2yvq8NACCadDZUX2qlIH90qcQ2H1zIwqv1SDqVoc2vQ_iQ 

I wanted to post this here so that others can search and find this info.
 

additional follow up question.  for a VR sensor would we use the DI positive or negative inputs for the Thunder ECU?

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  • 3 months later...

We just bit the bullet with this and on my ABS unit, 1986, the following was found with a multi-meter at the Bosch ABS loom plug at the unit itself;

Front Left red pin #4, earthed

Front Left red pin #6, not earthed

Front Right green pin #21, earthed

Front Right green pin #11, not earthed

Rear Left white pin #9, earthed

Rear Left white pin #8, not earthed

Rear Right yellow pin #26, earthed

Rear Right yellow pin #24, not earthed.

So, I have run wires from Plug 'C' pins DI 11+, DI 12+, DI 13+ and DI 14+ to ABS pins 6, 11, 8, and 24

and DI 11-, DI 12-, DI 13- and DI 14- to ABS pins 4, 21, 9, and 26.

I hope this is correct??

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Just to add to this thread. Im using the advanced wheel speed sensor setup from

https://mapdccd.com/awss.html

This ties into your abs sensors, sends a vehicle speed sensor signal (had to do this because trans had no speed sensor) and this also has a slip output to tie into ecu.  This was primarily designed for subarus, but should work with anything using similar abs sensors.

 

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12 hours ago, h82lose91 said:

Just to add to this thread. Im using the advanced wheel speed sensor setup from

https://mapdccd.com/awss.html

This ties into your abs sensors, sends a vehicle speed sensor signal (had to do this because trans had no speed sensor) and this also has a slip output to tie into ecu.  This was primarily designed for subarus, but should work with anything using similar abs sensors.

 

Not sure what the point is, the Thunder or any of our G4X ecu's will do all of that directly without any extra box as well more functionality such as you can choose to use fastest, slowest or averaged wheelspeeds etc.

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