MSefi.com read only forum (Jan.15,2018)

For sure it's used in the 1.8 and 1.8T from Audi/VW. But probably also on some other VAG engines.
The big advantage is the standard place holder for the sensor and the re-use of the standard harness.
Nobody else taking use of these advantages with a similar engine?

up

I am using the Audi/VW OEM CLT sensor, the ELTH 078 919 501 B.
Calibration has been done with some ice and boiling water. These where the result:
Temp, degC Resistance
0 - 5940
22 - 2300
100 - 200

Now my engine temp seems a bit high and I would like to be sure that the calibration figures are ...

FIdle question continued in seperate topic:
viewtopic.php?p=187261#187261

Thx sofar, however question remains:
Is it possible to set a fixed DC between 0 and 40 degrees, instead of a lineary decrease with an increase of the CLT? so that the idleDC is x% till 40 degrees and 0% when higher CLT temps are reached.

Unfortunately these high PWM frequencies are not possible (with MS1 at least, I don't know for MS2).
The exact frequency is also a bit unclear, the window states 10000/x and the help screen (F1) states 1000/x.
But I noticed that with these low frequencies it is very hard to control the valve.
33 ...

Thx

So pwm with a frequency between 20-30 kHz. MS1 does not get higher then 10kHz, but it is worth a try.

vinister wrote:Isn't that a drive-by-wire throttle body?

No, its a cable TB and there is no idle control anywhere else on the engine.
That's why I expect that audi/vw is using the "motor" in the TB. But how?

I found this schema of the TB. Is this a stepper motor?

Pin 1 & 2 are for the idle control, but how can MS control this?

It opens about 5-10 degrees, I haven't got the engine running yet, so I am also curious what it would mean in rpms.
I also had the same idea about PWM, but left it behind me. I do not see the real purpose for it on my car. However I think it will work, Audi/VW is using it like this I would say.

For the next one who wants to use this throttle body,
the pinout is correct and working fine after calibration in Megatune.

thx for the responses

I have done some measurements with the following outcome:
1. actuator + (idle) ?
2. actuator - (idle) ?
3. closed = pin 7 / open = ∞
4. GND ?
5. TPS ? (0,6V closed / 4,3V full)
6. not connected
7. +5V ?
8. ?

Can someone pls. confirm!

At the moment I am figuring out what OEM sensors I can re-use from Audi/VW.
And (sofar) the TPS seems to be the only mystery. It has 7 pins, too many combinations to try.
Who can tell me the pin description for this throttle body:

http://rush.smolly.nl/images/change4/throttle_1.jpg
http://rush ...