PlugAndPlayMotronic/BmwEngines (2007-08-23 18:13:08)

BMW engine running with VEMS PNP (motronic55 connector)

Beware that a PNP install can only save you from making a harness, the installer MUST still verify the harness, and also some small modifications needed to have a reasonable setup (with stuff that can be done better than originally, or which was missing completely: eg. WBO2, analog TPS, DIS, boostcontrol, launchcontrol input, shiftlight output, etc...)

It's an M20B25 engine (from BMW 325 IX E30 ~1988), but it seems BMW was pretty consistent with the pinout, not many variations

TODO: more notes


Idle air controller

Anyone knows

Gergely Lezsak made a few engines, he wrote some docs too, thanx :


Tacho output for RPM gauge

seems to require inductive pullup (eg. 100 Ohm * 220uH). Does anyone BMW dash RPM-gauge working from "logiclevel" 0/5V or 0/12V output ?


Switch TPS to Variable TPS

The BMW Motronic 1.3/1.0/1.1 TPS connector is the same as the variable TPS ones, the Motronic 1.1 or 1.3 TPS wires all go directly to the Motronic connector, Thus no wire changes are actually needed. And any 5V supply , ground and return signal

can be done within the case.

Do you happen to know which motronic55 pins connect to the variable TPS when a variable TPS is hooked up ?

Do you know part numbers for the variable TPS?

I guess it's not mechanically (or even pinwise?) compatible with the [certain Bosch TPS]