What is ECU and TCU in car?

A TCU in a modern automatic transmission generally uses sensors from the vehicle, as well as data provided by the engine control unit (ECU) , to calculate how and when to change gears in the vehicle for optimum performance, fuel economy and shift quality.

What does tuning a transmission do?

By adjusting shift points, tuning can dramatically alter a vehicle's performance and driving characteristics . Advancing shift points can leverage engine power for faster acceleration, while delaying them can benefit fuel economy.

How do I reset the transmission control module?

Turn off your vehicle's ignition and wait patiently for 5 to 10 seconds. Start the engine and allow it to idle for several seconds. Switch off the ignition and wait patiently for another 30 to 40 seconds. Repeat these steps 2 to 3 times in order to reset your vehicle's transmission control module.

Is transmission tuning worth it?

Without TCM tuning, you can actually damage your transmission and run into things such as clutch slippage and torque converter issues . That's because TCM tuning alters shift points and valve body pressures to increase the stiffness in shifts and help the transmission cope with the increased power.

Can a tune-up fix transmission problems?

Improved Performance: A transmission tune-up can help improve your vehicle's performance by ensuring that the transmission operates smoothly and efficiently . The fresh fluid and new filter can help reduce friction within the transmission, which can help improve fuel efficiency and power delivery.

Does tuning increase horsepower?

ECU tuning can increase horsepower by optimizing the air/fuel ratio, ignition timing, and turbo boost pressure. It can provide several benefits, including increased horsepower and torque output, improved fuel efficiency, and better drivability.

What does TCU mean on a car?

A TCU ( Transmission Control Unit ) is an electronic component that is used in automatic gearboxes in modern cars. As the name suggests the TCU like the ECU is a computer that controls the mechanical components in the gearbox.

What does ECU stand for on a car?

ECU stands for ' Electronic Control Unit '. You may have heard this referred to as an engine control unit or an engine management system before, too.

What is ECU and ECM in car?

An engine control unit (ECU), also called an engine control module (ECM), is a device which controls multiple systems of an internal combustion engine in a single unit .

What does ECM and TCM mean?

Your Car Our Care This is where PCM or Powertrain Control Module comes in. It is basically the heart and brain in a modern production car. The PCM is a combined function of an ECM (Engine Control Module) and TCM ( Transmission Control Module ) wherein the PCM can handle the functions of an ECM and TCM combined and more.

TCU, TIP Chip, automatic transmission tuning, reading writing etc. (2024)

k0mpresd

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	Re: Me7 read/write tcu for tip chip? « Reply #30 on: November 24, 2012, 07:24:02 PM »

exact same thread is here basically: http://nefariousmotorsports.com/forum/index.php?topic=453.15


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k0mpresd

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	Re: Me7 read/write tcu for tip chip? « Reply #31 on: November 24, 2012, 07:31:43 PM »

Quote from: AARDQ on November 18, 2012, 08:38:43 AM

I've found what I take to be maps and am beginning to disassemble, but haven't been able to spend much time on it, unfortunately. Maybe over the holidays...

where do your maps start? i havent looked at the tcu dump i posted in a while but from what i remember it looked like all the maps were pretty near the end of the code. some of them had bosch 8 bit axis definitions in front.


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AARDQ

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	Re: Me7 read/write tcu for tip chip? « Reply #32 on: November 24, 2012, 09:10:40 PM »

Quote from: k0mpresd on November 24, 2012, 07:31:43 PM

Yes, exactly. Most of them start about 2/3 of the way through. Like this one at 63F26. Sure looks like torque (or maybe airflow) vs. RPM.


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AARDQ

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	Re: Me7 read/write tcu for tip chip? « Reply #33 on: December 01, 2012, 12:40:04 PM »

Based on the Freescale/Motorola 68376 (extension of 68020) so there's some hope for this. TouCan (printed on CPU) is reference to a built-in CAN controller.


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k0mpresd

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	Re: Me7 read/write tcu for tip chip? « Reply #34 on: December 01, 2012, 12:48:04 PM »

it has bdm as well.


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prj

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	Re: Me7 read/write tcu for tip chip? « Reply #35 on: December 01, 2012, 01:29:47 PM »

So the next thing is to disassemble the binary and see how it works.
What would help would be a tracing of the pins to the main processor.

If that could be gotten down that'd help a lot.

The CAN messages we already now - because of the spec on the ECU side.
If that can be read, one can see how the values are used.


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AARDQ

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	Re: Me7 read/write tcu for tip chip? « Reply #36 on: December 01, 2012, 05:37:39 PM »

Quote from: prj on December 01, 2012, 01:29:47 PM

So the next thing is to disassemble the binary and see how it works.
What would help would be a tracing of the pins to the main processor.

If that could be gotten down that'd help a lot.

The CAN messages we already now - because of the spec on the ECU side.
If that can be read, one can see how the values are used.

I'm going to pick a spare up off of fleabay and start playing. Unfortunately the exact match for the one in my car is pricey. May just learn with a cheaper version and transfer knowledge to the in-car TCU once I'm confident I mostly know what I'm doing. Seems like there's not much knowldege out there on interchangeability. I want to keep traction/stability control so need to be careful with that aspect. I've downloaded CodeWarrier (thinking that it would be better than Ida Pro in this instance -- any views on that?). As soon as I can get the stupid registration that didn't work resolved...


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prj

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	Re: Me7 read/write tcu for tip chip? « Reply #37 on: December 02, 2012, 01:37:59 AM »

I think IDA will be much better...


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AARDQ

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	Re: Me7 read/write tcu for tip chip? « Reply #38 on: December 05, 2012, 09:01:44 AM »

Ida (5.X, anyway) using the 68330 definition file... chokes on the TouCan module making it difficult (for me anyway -- noob alert) to find the proper entry point for what we're really interested in. A way around that seems to be to run it through the HCS12 definition file (the sub model with RAM, ROM and EEPROM). The CAN instructions associated with TouCan show up even if most of the rest of it is wrong and show the correct entry point for use with the (correct) 68330 definition file at 4000h. All of the labels show up properly using the HCS12 definition file also. (Which, now that I think about it, I haven't been able to achieve using the 68330 definition file, so could be that 4000h is wrong and off slightly.)

Trivia: the file posted by k0mpressed in the other thread is from a W8-powered car.

The processor is definitely a 68376; ZC439616CFT16 is listed in a product-change announcement for the part on the Freescale site.

Just posting in case anybody else is interested.

Editing the above crap info lest anybody waste time trying to duplicate, it looks like the correct entry point is (may be?) 0x412h. Not sure why TBL lookup instructions don't seem to be used, since they are 'new' to the 6833x series. Or maybe I just don;t know what I'm looking at (a definite possibility).


« Last Edit: January 09, 2013, 03:39:21 PM by AARDQ »	Logged

AARDQ

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	Re: TCU, TIP Chip, automatic transmission tuning, reading writing etc. « Reply #39 on: February 17, 2013, 09:46:09 AM »

As it turns out, the Nefmoto flash software can connect with the TCU, address 0x02. I had never noticed that the address is selectable from the KWP2000 Settings page.

The software won't negotiate timing properly and some precondition isn't met (among other things?) and so won't read the flash, though.

Anybody able to provide guidance?

Log attached.

On the bench, K is pin 88, power to pins 26 and 55 (switched) and ground pin 34. Cable connections as usual.


« Last Edit: February 17, 2013, 09:51:00 AM by AARDQ »	Logged

neuro

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	Re: Me7 read/write tcu for tip chip? « Reply #40 on: March 28, 2013, 06:52:34 PM »

audi a6 c5 2001 original tcu dump. I wish i could tune it


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ratherb1

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	Re: Me7 read/write tcu for tip chip? « Reply #41 on: April 04, 2013, 11:57:56 AM »

Quote from: skprod on March 28, 2013, 06:52:34 PM

audi a6 c5 2001 original tcu dump. I wish i could tune it

This would be so great if someone could tune it ....... How did you pull it?


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-ROMIE

S4dizzle219

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	Re: TCU, TIP Chip, automatic transmission tuning, reading writing etc. « Reply #42 on: April 26, 2013, 08:28:02 PM »

So is this a working tcu tune or are tree any? If I could get my shift times down my car would e incredible and I'm not a fan of the cookie cutter tubes offered. Did connectivity ever get figured out here


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AARDQ

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	Re: TCU, TIP Chip, automatic transmission tuning, reading writing etc. « Reply #43 on: April 28, 2013, 08:14:18 AM »

Quote from: S4dizzle219 on April 26, 2013, 08:28:02 PM

Haven't worked on it in a while -- decided to convert to 6MT. Sorry.


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Mantis

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	Re: TCU, TIP Chip, automatic transmission tuning, reading writing etc. « Reply #44 on: April 29, 2013, 02:24:57 PM »

I have had a TCU with TIP file on it sitting on my desk for 4years, mine is a soldered version, if anyone thinks it could be of use, I will try to dump the file


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TCU, TIP Chip, automatic transmission tuning, reading writing etc. (2024)

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