gti golf 4 vag me7.5 ecu repair.

[frikki]

hi there. have two damaged vag benzin me 7.5 ecu's. vehicle is a 2003 gti, engine number AUQ. no visible damaged could be seen with the eyes. original ecu failure caused by lambda sensor wiring burned, causing a short. obviously the lambda sensor does not run threw a fuse. stuffs up the ecu immeadiatly. im trying by all means to repair both the ecu's. old one and the newly replaced one. both the ecu's start the vehicle fine, but it does not rev up at all. could some member please advise me on trying to fix the ecu's. is there maybe a common part that fails when the lambda sensor shorts out. many thanks in advance. the followint fault codes appear.

18042 - Accelerator Position Sensor 2 (G185): Signal too High
P1634 - 35-10 - - - Intermittent
18039 - Accelerator Position Sensor (G79): Signal too High
P1631 - 35-10 - - - Intermittent

[NASTASE]

Check wiring and components Oxygen sensor and acc. sensor.

[NASTASE]

More informations .

[frikki]

everything has ben checked. sensors has been replaced with new one. acc. pedal has been replaced. also brand new ecu, which obviously popped because of lambda sensor which were discovered late. i need some info on how to check ecu and repair damaged parts. maybe there is a known part that packs up if lambda sensor is faulty. many thanks.

[frikki]

no member has any related problem before ??? thanks.

[hartklep]

Both error messages indicate accelerator sensors.
Maybe your throttle sensor wiring between ECU are broken.
Not the sensor on the engine .
But the sensors by the gas pedal
Good Luck

[Youneselm]

compare the dump of the motordata off the 2 ecu's

[raedareeg]

chick 6 wires to acc

2 of them must have 5 volts
another 2 must be ground
the other 2 are for feedback....redundant one is about 1.5v ...the other is 3.5 v...

i think you have no ground from ecu????

also check pin 91 and 83 ,one of them have to be ground

[frikki]

the ecu is definitly a problem. we strongly suspect a hardware failure. (no software) has spoken to few other people. had same problem, but could not fix the ecu's. maybe some member experienced a ecu problem before and fixed it themselfs. if could get my hands on a similar ecu, i could test some parts on the pcb and compare. many than ks.

[frikki]

has no member ever experiencing a problem with this tipe of ecu before. i need to rty by all means to repair both these ecu's. :giveup::heeeelllllooooo:

[ecufix]

Do you have the 5v and sensor ground coming out of the ecu ?

[haroutioun]

has no member ever experiencing a problem with this tipe of ecu before. i need to rty by all means to repair both these ecu's. :giveup::heeeelllllooooo:
Hello,
bro i thing your problem is not engine ecu.(1) your problem short wiring to ground or + (2) check your fan wiring, (3) disconnect connector of camshaft, after try to clear faults and see if is the same faults is like befor below?. because this kind of faults is not easy to find. i always have the same problem and the same fault codes in my work shop, and every time come out not the same components faultly, which give us the scanner,i am surly there are some pieces thy do this fault.but not which scanner give to us...
18042 - Accelerator Position Sensor 2 (G185): Signal too High
P1634 - 35-10 - - - Intermittent
18039 - Accelerator Position Sensor (G79): Signal too High
P1631 - 35-10 - - - Intermittent

[frikki]

Do you have the 5v and sensor ground coming out of the ecu ?

i will power up the ecu on the bench and test for those two power pins. thanks.

[frikki]

Hello,
bro i thing your problem is not engine ecu.(1) your problem short wiring to ground or + (2) check your fan wiring, (3) disconnect connector of camshaft, after try to clear faults and see if is the same faults is like befor below?. because this kind of faults is not easy to find. i always have the same problem and the same fault codes in my work shop, and every time come out not the same components faultly, which give us the scanner,i am surly there are some pieces thy do this fault.but not which scanner give to us...
18042 - Accelerator Position Sensor 2 (G185): Signal too High
P1634 - 35-10 - - - Intermittent
18039 - Accelerator Position Sensor (G79): Signal too High
P1631 - 35-10 - - - Intermittent

the wiring has been checked by three different auto electricians. the very last one has discovered that the lambda sensor wiring were burned against the exhaust and shorted out. missing the positive wiring running threw a fuse. i have personally plugged the original ecu into another similar vehicle. the two same faults came up. vehicle started and refused to rev up. so that confirms that the ecu is fried. many thanks. keep well dear friend.

[electrones]

hello friend,
the high voltage sensor (circuit and short)
Good, this occurs when the voltage sensor is at 5V. Check the reference voltage which can not be greater than 5.04 V. If in order, check the possibility of wire reference not be shorted to the signal. If in order, measure the resistance minima of the sensor (signal and ground pin). value can not be equal to 0 ohms. If the resistance is zero 0 ohm, replace the sensor. If in order, possible defect in the control unit. check them calmly.

[teuton]

Try to follow the traces from the respecting pins all thru the pcb and check the involved components. Sounds more like a app/driver problem than anything related to O2 sensor(heater) to me.

BR

[hartklep]

hello

In the ECU is a IC 95040 that stores the errors.
If you put the ECU in another car then you keep the same error.
In the same IC also includes the immo.
You need first to remove the immo en then you can test the Ecu in another car and remove the error code.
If you not remove the immo the car runs only for 5 seconds in limp mode.

When you try your origenel Ecu in another car the immo block the Ecu .


Good Luck

[frikki]

[QUOTE=hartklep;1483622]hello

In the ECU is a IC 95040 that stores the errors.
If you put the ECU in another car then you keep the same error.
In the same IC also includes the immo.
You need first to remove the immo en then you can test the Ecu in another car and remove the error code.
If you not remove the immo the car runs only for 5 seconds in limp mode.

When you try your origenel Ecu in another car the immo block the Ecu .

dear friend the immo has been removed already. and the fault codes can not be erased. the vehicle starts fine and idle. but not reving up. it doesnt look like any dk members has ever had a me 7.5 ecu repaired which had the same problem. i have tried search info all over the net to try and repair damaged ecu, with no luck!! ~~~cn frastrating! i will have to throw in the towel now!!! :giveup:

[ghostridersa]

[QUOTE=hartklep;1483622]hello

In the ECU is a IC 95040 that stores the errors.
If you put the ECU in another car then you keep the same error.
In the same IC also includes the immo.
You need first to remove the immo en then you can test the Ecu in another car and remove the error code.
If you not remove the immo the car runs only for 5 seconds in limp mode.

When you try your origenel Ecu in another car the immo block the Ecu .

dear friend the immo has been removed already. and the fault codes can not be erased. the vehicle starts fine and idle. but not reving up. it doesnt look like any dk members has ever had a me 7.5 ecu repaired which had the same problem. i have tried search info all over the net to try and repair damaged ecu, with no luck!! ~~~cn frastrating! i will have to throw in the towel now!!! :giveup:

Frikki, I had a similar problem with a me 7.5 and at the end of the day it turn out to be the engine speed sensor which was faulty and it wouldnt rev over 2800 rpm and then went into limp mode. No of the codes when I scanned the car showed anything pointing to the engine speed sensor, it only threw other codes. Replaced the sensor and it was fine again.

[dimitar]

[QUOTE=hartklep;1483622]hello

In the ECU is a IC 95040 that stores the errors.
If you put the ECU in another car then you keep the same error.
In the same IC also includes the immo.
You need first to remove the immo en then you can test the Ecu in another car and remove the error code.
If you not remove the immo the car runs only for 5 seconds in limp mode.

When you try your origenel Ecu in another car the immo block the Ecu .

dear friend the immo has been removed already. and the fault codes can not be erased. the vehicle starts fine and idle. but not reving up. it doesnt look like any dk members has ever had a me 7.5 ecu repaired which had the same problem. i have tried search info all over the net to try and repair damaged ecu, with no luck!! ~~~cn frastrating! i will have to throw in the towel now!!! :giveup:

problem inside infineon sac c167 firmware. use vas 5054 to update ecu . a friend of mine had the exact problem thou i dont remember his fault codes

[hartklep]

Hallo,
What is number of the 7.5 ECU?
Is this 06A.906.032.HN

Here you find everything about your ecu.

http://spreadsheets.google.com/ccc?key=0Atc5QQQNw_5ndHV3aGNua1NXdnh5N3lEQlUyS0J4V 0E&hl=en

[frikki]

Hallo,
What is number of the 7.5 ECU?
Is this 06A.906.032.HN

Here you find everything about your ecu.

http://spreadsheets.google.com/ccc?key=0Atc5QQQNw_5ndHV3aGNua1NXdnh5N3lEQlUyS0J4V 0E&hl=en


there is not much info on this spreadsheet friend. cheers.

[hartklep]

All info can be found for the ECU.
You indicate that your lambda sensor wiring were burned.
In the spreadsheet you can read the connection to pin 5 of the ECU is mounted to the IC BUK 108.2 goes. This is a PowerMOS transistor. Have you measured this or that is broken Without a working Lampda the car will not run well.
If you do not indicate which outputs are not working, no one can help you.

[frikki]

All info can be found for the ECU.
You indicate that your lambda sensor wiring were burned.
In the spreadsheet you can read the connection to pin 5 of the ECU is mounted to the IC BUK 108.2 goes. This is a PowerMOS transistor. Have you measured this or that is broken Without a working Lampda the car will not run well.
If you do not indicate which outputs are not working, no one can help you.

thanks friend. will have a look again. keep well.

[frikki]

hartklep the spreadsheet is not talking about any lambda sensor testing. is there any other way of sending the info to me. many thaks. keep well.

[hartklep]

You can test it with Vagcom.

Select "01" for motor-STG

In Group 030, we find the oxygen sensor status

Three binary digits indicate the state at 1 = on and 0 = off

The first Digit represents state of the lambda probe heating

The 2nd digit is for operation of the lambda probe

And the third Number of active lambda control

In Group 032, the lambda values ***8203;***8203;learning

Simply put, the values ***8203;***8203;in

Bank1 idle setpoint value between -10 and 10%

Bank2 at part load nominal value between -10 and 10%

[ghostridersa]

Thats good if thanks I will try that.

[pawel107]

thanks friend. will have a look again. keep well.

i have the same problem, did you find a solution?

[morgano]

Did you try replacing the BUK 108.2 as suggested?

[jurlak1]

Hi. This bypass solved my problem. :) If help press thanks and rep. BR