TCM gescheitert?
Hallo Leute ,
Wenn TCM ausfällt, funktioniert die Übertragung der Arbeit manchmal oder es funktioniert nicht ?
Ursache in meinem Fall, die Übertragung funktioniert gut, wenn die Motortemperatur auf Betriebsebene ist ! Und es zeigt Warnungen auf dem Armaturenbrett Wenn temps niedrig sind !
Vielen Dank!
Beste Antwort im Thema
Zitat:
@Forf schrieb am 1. April 2016 um 00:08:52 Uhr:
Zitat:
@oldmanscout schrieb am 31. März 2016 um 23:47:28 Uhr:
That sound like an electronic failure inside the TCM. I would send it in to check and repair.
I recommend www.ecutesting.com if you are in GB.Lets suppose its a failure in electronic inside TCM. Why it works when its warmed up? Generally speaking, electronic parts like transistors, diodes, etc, tend to fail when heated!
.........
Maybe inside the tcm is a lose soldering. When the tcm gets warm the soldering expands and the electrical contact is good!
Greetings,
der_Nordmann
30 Antworten
Zitat:
@oldmanscout schrieb am 31. März 2016 um 23:07:12 Uhr:
Did you recognise any tranny malfunction like no shifting or slipping gears?
Maybe low oil level when the oil is still cold?
Thought about low oil level, which if its low, it would not polish all the sensors: OSS. Main pressure sensor, tft sensor until the oil expands when heated but if that's the case, wouldn't it bring up the DTC relevant to the sensor?
Zitat:
@Forf schrieb am 31. März 2016 um 23:17:19 Uhr:
When those two warnings appear, screen flashes. If I turn the engine off and then ignition on only, "transmission malf" only is appeared on dash, PRND randomly changes on screen, and the starter relay clicks fast on the fusebox.And when engine reaches operational temp, none of that happens!
That sound like an electronic failure inside the TCM. I would send it in to check and repair.
I recommend www.ecutesting.com if you are in GB.
Zitat:
@oldmanscout schrieb am 31. März 2016 um 23:47:28 Uhr:
Zitat:
@Forf schrieb am 31. März 2016 um 23:17:19 Uhr:
When those two warnings appear, screen flashes. If I turn the engine off and then ignition on only, "transmission malf" only is appeared on dash, PRND randomly changes on screen, and the starter relay clicks fast on the fusebox.And when engine reaches operational temp, none of that happens!
That sound like an electronic failure inside the TCM. I would send it in to check and repair.
I recommend www.ecutesting.com if you are in GB.
Lets suppose its a failure in electronic inside TCM. Why it works when its warmed up? Generally speaking, electronic parts like transistors, diodes, etc, tend to fail when heated!
And that clicking starter relay makes me think when ignition is on, there is no enough voltage being sent to the relay this it can not close the switch and it clicks!
Zitat:
@Forf schrieb am 1. April 2016 um 00:08:52 Uhr:
Zitat:
@oldmanscout schrieb am 31. März 2016 um 23:47:28 Uhr:
That sound like an electronic failure inside the TCM. I would send it in to check and repair.
I recommend www.ecutesting.com if you are in GB.Lets suppose its a failure in electronic inside TCM. Why it works when its warmed up? Generally speaking, electronic parts like transistors, diodes, etc, tend to fail when heated!
.........
Maybe inside the tcm is a lose soldering. When the tcm gets warm the soldering expands and the electrical contact is good!
Greetings,
der_Nordmann
Anyone know what the bytes like 20, 21, A0, A1 tell in DTCs? i.e p0700-21
Zitat:
@der_Nordmann schrieb am 1. April 2016 um 08:35:16 Uhr:
Zitat:
@Forf schrieb am 1. April 2016 um 00:08:52 Uhr:
Lets suppose its a failure in electronic inside TCM. Why it works when its warmed up? Generally speaking, electronic parts like transistors, diodes, etc, tend to fail when heated!
.........Maybe inside the tcm is a lose soldering. When the tcm gets warm the soldering expands and the electrical contact is good!
Greetings,
der_Nordmann
Isn't there room to suspect on ABS/ESP module from DTC U2023?
Zitat:
@der_Nordmann schrieb am 1. April 2016 um 08:35:16 Uhr:
Zitat:
@Forf schrieb am 1. April 2016 um 00:08:52 Uhr:
Lets suppose its a failure in electronic inside TCM. Why it works when its warmed up? Generally speaking, electronic parts like transistors, diodes, etc, tend to fail when heated!
.........Maybe inside the tcm is a lose soldering. When the tcm gets warm the soldering expands and the electrical contact is good!
Greetings,
der_Nordmann
Hi der_Nordmann,
Went to a transmission specialist who checked the oil level, he said oil level is good and color of the oil was green. He then said that transmission is good!
Went to the car electrician, he said it looks like TCM is the issue and you can try to isolate it by removing the cable harness from the ABS/ESP module and test drive the car, if the problem persists then the issue is the ABS/ESP module.
How do you find this suggested test?
Cheers!
Forf
It is try and error concept! It is a common troubleshooting method.
But why and how the abs/esp modul takes action on the tcm? I don't know!
I would try it out!
Regards,
der_Nordmann
Good morning der_Nordmann! 🙂
There are two fuses related to ABS: fuse 8 - stability control pump and fuse 19 - ABS module.
In case I want to disable the ABS/ESP (equivalent of disconnecting the cable harness from the module) would I need to take out fuse 19 only? Or 8 and 19?
Cheers!
Forf
Puh, normal, if you disable esp the abs isn't working too. But i am not quiet sure.
let's See if someone lese Gott an idea?
Hat jemand ne Idee, wie man Abs bzw. Esp deaktiviert? Sicherungen 8 und 19 einfach rausziehen?
Gruß,
der_Nordmann
Update: took out the fuse 19 only for the ABS module and tried driving the car.
Only "transmission malfunction" appeared!!!
It clearly be seen the issue is relating to temperature/pressure because once engine is hot it works good!!!
I thought the Transmission is always working fine?
only the Display Shows the Alarm?
Zitat:
@der_Nordmann schrieb am 16. April 2016 um 11:31:10 Uhr:
I thought the Transmission is always working fine?
only the Display Shows the Alarm?
When engine is cold and I start driving (it also happens when car is parked not moving and I start the engine On) those two messages appear "transmission malfunction" and "ESP system fault", and the RPM needle increases itself by 0.3, you get a feeling like the car was pushed from behind due to 0.3 increase of acceleration. When all this happens the car gets into what I read it's called "limp mode" and the engine power is reduced. All this issue is happening until the engine temp reaches ~70 C.
After the engine reaches or exceeds that value it works all fine and NO message appears anymore!
From the IDS DTCs don't tell anything specific like X sensor or Y solenoid!