Error code 41 - TPS

[Kristian_Wraae]

I'm not an electronics wizzard but I have wired in a few things. But I discussed the quote from the TSRM with an electronics engineer (who btw has build his own ECU for a 7mGTE from scratch) and he told me it would be possible for an ECU to distinguish an unplugged sensor from a broken sensor. But on the JZA80 doing so through VCC would be difficult since VCC goes to both TPSs and to the MAP-sensor.

But in general an ECU could test either current through VCC-E2 or connection through IDL-E2. This combined with short or open i VTA-E2 could be interpreted by the ECU as sensor present but broken. No current through VCC-E2 or no connection through EDL-E2 and open in VTA-E2 would then be interpreted as sensor unplugged.

But I fail to see how distinguishing between the two situations (plugged or unplugged sensor) will be of any use since both a broken and an unplugged sensor will need fixing. And in the situation with testing for present sensor through connection through IDL-E2 an unadjusted broken sensor will set no codes.

So I think that the quote is wrong too.

[Boosted516]

like seoul4korea said the pcm see's 0-5volt, a good tps will show .5 at closed throttle and 4.5 at WOT. They recognize a problem when they see under .5(open) and over 4.5(short).

[Kristian_Wraae]

like seoul4korea said the pcm see's 0-5volt, a good tps will show .5 at closed throttle and 4.5 at WOT. They recognize a problem when they see under .5(open) and over 4.5(short).

Yes, I know that.

The question I'm asking in this thread which Jetjock fails to understand is if the underlined part of the quote in the TSRM is right or wrong.

I have a new TPS here and everything is working fine.

The question was never whether my TPS was bad or not, or how to test if a TPS is bad.

I only asked if it was really true that an unplugged sensor would not set the code as I understand the underlined part of the quote in the first post.

[Boosted516]

this is just a stupid thread then...

[Kristian_Wraae]

I guess politeness is not something we cherish here on SM.

Nobody bothers to read the actual question and a person who should know better (at least that is what he claims) answers questions that were never asked, and on top of that gives wrong and contradictory answers in an arrogant patronizing tone.

[jetjock]

...The question I'm asking in this thread which Jetjock fails to understand is if the underlined part of the quote in the TSRM is right or wrong....

I understood perfectly and answered the question twice. Apparently you missed it both times.

...I have a new TPS here and everything is working fine.....I only asked if it was really true that an unplugged sensor would not set the code...

Here's an idea: now that everything is working fine you can unplug it and see for yourself.

like seoul4korea said the pcm see's 0-5volt, a good tps will show .5 at closed throttle and 4.5 at WOT. They recognize a problem when they see under .5(open) and over 4.5(short).

This, while not entirely accurate, is closest to the way it works.

[seoul4korea]

I've already stated I have no clue as to why the TSRM states that:

"(Now I have no clue as to the relation of the TSMR as to why it's stated the way it is.)"

I can only go off of what I know about electrical stuff. In fact I'll go outside and test this on my 1J right now.


Ok here's what I got, I just went outside to test this out and figure out whats going on. First I started the motor then unplugged the TPS, the motor dropped in rpm but NO check light. I then plugged it in and the rpm's returned normally (It only dropped like 50-100 rpm.)

Then to test and make sure the my CEL light was working correctly I unplugged my MAP sensor and recieved a CEL light.

Now keep in mind that I have Greddy Emanage Blue so I have no clue as to whether that could the effect voltage that the ECU is reading. From my knowledge the EMB only reads the TPS voltage, not modify.

So maybe the TSRM has some merrit with that statement.

[Kristian_Wraae]

I understood perfectly and answered the question twice. Apparently you missed it both times.



Here's an idea: now that everything is working fine you can unplug it and see for yourself.



This, while not entirely accurate, is closest to the way it works.

Well this is taking some time, primarily because you are not clear in your answers.

Since English is not my primary language I can't rule out that I'm not getting your answers because of that.

But just to recapitulate:

The quote:

When the connector for the throttle position sensor(s) is disconnected, diagnostic trouble code 41
or 47 is not displayed.

As I understand it, it says that when the sensor is disconnected the code is not set.

You say:

The code should be there when the TPS is unplugged

and you say:

And the quote is true.

So it is true that a disconnected sensor will not set the code but an unplugged sensor will set the code?

So in my world that is a contradiction assuming that disconnected and unplugged is the same. So there must be information missing regarding some other condition that will come into effect (ie. engine running or not - while disconnecting).

So maybe it has to do with something being disconnected while running or something unplugged and then started?

As I said my first language is not English so I might miss the finer details but it doesn't make me stupid or ignorant.

Now I have tried to express exactly what is bothering me. Now you can with your infinite wisdom try to fill in the blanks.

[Supracentral]

Let's tone it down a couple of decibels folks...

[ifyouaint1sturlast]

I think it's safe to say that the code will be there if the ECU isn't getting the signal it wants - be that no signal or wrong signal.