Error memory 1Z-TDI

Hello,
'I'm having a problem where, when installing a used gearbox, an error code appears in the diagnostic memory for the...'
Engine control unit: Error codes (553, 539, 522, 777, and 527) cannot be cleared.
After adjusting the immobilizer, the engine started, but with an increased idle speed and no response to the accelerator pedal. Of course, the error codes could not be cleared even then.
Does anyone know if there's anything that can be salvaged, or is the ECU beyond repair?
I am grateful for any feedback.

After adjusting the immobilizer, the engine started, but with an increased idle speed and without responding to the accelerator pedal. Of course, the error codes could not be cleared even then.


Sounds like it's in emergency mode.

553 LMM.
539 fuel temperatures.
522 Cooling temperature.
777 Gas Pedal Extender.
527 Intake air temperature sensor.

Did you install an identical TCU (Transmission Control Unit)? It's possible that some of the pins are configured differently, which is why the motor might not be able to check certain functions and is entering a fault mode.

Or have you forgotten to attach something?

Hello Ralf,
The control unit is the same as the one originally installed in the vehicle. The one with the problems comes from a vehicle that was involved in an accident, and all the error messages except for 777 (throttle sensor implausible signal) indicate a short circuit to positive. My concern is that the accident may not only have damaged the sensors, but also the control unit itself due to the short circuits. Is this possible?
Thank you for your reply, Arnulf.

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hello diesel gustav,
Thank you for your response. I've learned quite a bit again. Your answer was more comprehensive than it needed to be, especially if I had specified the errors more precisely. The issue is short circuits to the B+ voltage. I purchased the used turbocharger as a 'spare' because I couldn't get a replacement quickly enough for my previous car when it failed. Therefore, this one will likely be defective as well.
Regards, diesel-driver.

Hello,

Stupid question from someone who doesn't know: What is B+ in a vehicle's electrical system?

Wishing everyone a successful and happy New Year, and sending warm greetings from the icy city of Vienna!

robert

Hi,

Battery +, which refers to the on-board voltage.

An input designed for only 5 volts relative to ground won't really appreciate receiving 12 volts, or even 14.4 volts.

Best regards,

Jan.

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Please, let me talk to the boss. That doesn't help anyone here.

Best regards, WarLord.

@diesel.gustav, what problem do you have?

Hello diesel-driver,

To be honest, I don't think you really understood my suggestions. If so, you should have come up with a slightly more diplomatic answer.

Have you actually read the text from diesel-driver carefully?

That was (though subtly) a compliment for your detailed answer.

hello diesel gustav,
Thank you for your answer; I have learned quite a bit again. Your answer is more comprehensive than it would have been if I had specified the errors more precisely.

Hello diesel-gustav,
I'm sorry that my response led to misunderstandings. I'm not the fastest typist, so I tend to be a bit slow when writing. When listing the errors, I should have included 'short circuit after B+' for all but the 777 error. However, at that time, I didn't know that the sensors from the control unit weren't receiving board voltage but only 5V, so it didn't seem as important. The 'learning from this' comment was only referring to myself, as now, after your response, I can check the sensors. Your response could have been less extensive if I had provided more precise information about the errors. However, I still wouldn't have known that the sensors only receive 5V. Thank you for your competent answer. I wasn't online every day, so my response is only coming to you today.
Regards, diesel-driver.

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