ECUMASTER ADU with Toyota BEAN MPX

Hello there!

I just bought a Ecumaster ADU Dash and since, for now, I'm still using my car as a street car I would like to keep all the lights/warning from the OEM cluster (airbag, doors, seatbelt, etc). I was thinking about just wiring all this stuff but it seems that some of them are managed through Toyota MPX system...

It's possible to read that signals using CAN bus and then send the information to the ADU Dash? Or since they are completely different communication systems is not possible?

If is not possible, any idea about what could I do to be able to add this signals status to the dash without interfering in the mpx..?

Best regards!:

BEAN is a completely different communications protocol then CAN. BEAN is 1 wire, I think 10V and way different message structure. All OEM's seem to have their own version of a 1 wire system, LIN bus seems most common but brands like BMW for example still use their own proprietary system. Toyota also used BEAN on some of the higher end models alongside CAN bus

Depending on what chassis Toyota a lot of those functions are still analog wiring, what chassis are you working on?

Hello!

It's a Toyota Mr2 Spyder (chasis W30).

You mean that I should look for the analog signals before entering to the ecu that transmits the information to the cluster through MPX?

Regards,

to my knowledge, there isn't any BEAN (mpx) based solutions.

The hardware architecture is very similar to LIN , but it would require custom timings to read and analyze.

Today I was doing some research/test on the car itself. I think that I will forget about "connecting" to MPX; now I'm more focused in order to try to get the "analog" signals of these lights, but it seems that I'm misunderstanding some things.

During my "verifications" I was able to confirm that the pins underlined correspond to actual status of the ligth in the oem gauge. I mean,

12B: 12V when ABS light ON

11B: 12V when P/S light ON (steering wheel)

16B: 12V when seat belt light ON

etc with Engine check, doors, etc.

[img="blob:https://www.hpacademy.com/097ec576-36ae-4450-b17f-711f11190692" alt="" alt="" ]

[img="blob:https://www.hpacademy.com/c2ec8b0e-6202-4dc0-aae4-f9845477aac9" alt="" alt="" ]The problem is that I just got the 12V when the conectors are plugged to the gague. If I try to make this test with the connectors unpluged I didn't get any volage. I'm worried about that pins only gets Voltage when the Gauge "ecu" does his job with the lights and so one...

I attach the OEM Gauge/Cluster Diagram just in case it helps, I also checked all individual ecu wiring diagram and I found this diagrams, more or less all of them looks similar.

PIN-10B: +12V

PIN-12A: GND

PIN-11B: Steering ECU signal that makes light turn on (?)

PIN-12B: ABS ECU signal that makes light turn on (?)

Regards!

Oooo I havent actually done a cluster swap on a SW20 yet. Done JZX's and SXE10, which ought to be similar.

On those cars the stuff like seat belt light, e brake, door pins etc were all switches connected to ground. Easy to test with a multimeter and connect to the ADU with a pull up enabled. When you're there with your multimeter you can also check the other wires in questions. Upon ignition cycle the lights on the cluster should light up as a 'bulb check' and that should allow you to see if they are ground switched or 12V.

The first PDF you linked shows only 2 MPX wires on the C connector, everything else I would expect to be analog

I was thinking about what your are saying but, unless aim doing something wrong, only get 12v when all the connectors are plugged in the orm gauge cluster.

Once I remove the connectors, cannot find any voltage :/

Will try it again during today :p

Hello!

Solved, I was yesterday checking one more time the pins from ecu and you were right.

These pins were conected to ground through the diferents ecus.

In some cades the pin have continuity when the lights is on snd in others (for abs or p/s) when de lights is on.

But it seems that connecting adu digital inputs to these pins can have all the gauge lights.

Thanks!!