Suzuki Grand vitara with denso ECU finaly started by removing chip from ECU.....

[kd1]

CORRECT TITLE

Suzuki Grand vitara with denso ECU finaly started by removing chip from ECU.....

Just to summerise what we had done:

We were getting error code 83 which indicates a fault in communication between ecu and immobilizer and the grand vitara is a year 2000 tdi with a denso immobilizer.

We checked all the wiring twice over and was ok.

We thought the immo maybee faulty so we
kept the same ecu in the suzuki (picture enclosed) and put an identical immo bought into the car and swapped the chips shown in the picture of immo enclosed, from the original immo to new to hopefuly sync them up (ecu to new immo).
This did not work

We then thought the ecu could possibly be faulty so kept the original immo and changed the ecu for an identical one we bought but swapped the chip containing the pairing immo info from original ecu into new ecu. (top left 8 pin chip TC97101P) This did not work.

In the end what did start the car was removing and leaving the TC97101P chip of stangely enough.

Removing this chip allowed the new and old ecu units to work with either of the two immos (using the correct key for the immos of corse).

Maybee the ecu chip with the correct info was corrupt in both ecus so was not allowing the ecu and immo to sync with the correct pairing code in ecu? And without this chip in the ecu it was seeing either immo as the correct one as it did not have a code to compare either immo info as wrong against?

I have added the reading from both ecu chips (TC97101P)
to see if they look correct or corrupt, not sure if the parts of the reading in 00s indicate this.

We have been trying to get this car to work for a while and were told the only way to pair the immo to ecu were a ?2000 tech 2, now we are trying to figure why the car has now started ? If anyone has any idea or knows why this has worked would be very interested to hear?


Hope this helps anyone else who have had problems with this car started.

Thanks kd1

[kd1]

Attachments forgot to add.

The ecu chips TC97101P were read as a TC89102P x 16 on the upa - usb programmer as this were the highest TC chip the programmer went up to and the only TC selection that would give a read out of the four TC chip choices shown on image (attached)

We took another reading of the TC97101P chips read as a TC89102 on a xprog m as this were the highest TC chip the programmer went up to and the only TC selection that would give a read out of the two TC chip choices shown on image (attached).

The reason we still took a reading without the right chip selection choices was to see if their was a difference between the two chips to confirm this were the pairing chip for the immo ecu sync but have posted the readings to see if they look like they contain errors as I thought ffs are shown in blank spaces but shows 00s which I were told is a none return value ?

Thanks kd1

[kd1]

We unpaired the keys to the immo and the keys still work so removing the ecu chip switches the immo off.
With the ecu to immo pairing chip inplace and correct keys car will not start so chip must be corrupt and some how got spiked.
hope this helps anyone with this problem.

kd1

[jlangmead]

Hi kdi
Thanks fior the info - My wife's Vitara is doing exactly the same and I must admit I'm stumped as not very good with electronics. I've been out with the multi-meter and tried all the things that have been suggested - got the DTC error codes and (83 on ECU and 23 on ICM) and then tested for 5v on ICM connector and all that... but might try the 'chip trick' as it sounds like it might work. i really can't afford the expense of buying new ECUs\ICMs or even taking it to a garage.
thanks
Jon

[jlangmead]

Hi kd1
One more thing. I haven't yet done a continuity test between the ICM to ECM data link cable. Do you know which pin it is on the ECM?
I think it's Pin 13 of E61 but not 100% certain.

thanks jon

[elecautocr]

very useful post, thanks

[jlangmead]

Hi Kd1
I removed the chip in the ECU to disable the immo and am now getting error 81 (ECU\ICM code not matched). The car wouldn't start but the battery was a little flat and so that may be the reason. I've put the battery on charge now.
When you did this yourself did you experience any new DTC codes (specfically code 81), the 83 code has now gone but this may be because code 81 is overiding the 83 code.

thanks
Jon

[jlangmead]

Hi
just to conclude this. I managed to get hold of another ECU IMMO and ignition lock\key and played around a bit more. These weren't paired and so I was expecting error codes showing that pairing was required - and I did get these. However, I soon discovered that the new IMMO worked with the old ECU (the one with the chip removed) and either one of the ignition keys (original and\or new). So I guess removing the chip in the ECU does indeed disable the immobdiliser but i must have had a dodgey IMMO which is why it didn't fix the problem by simply removing the chip from the original ECU.

Happy days!

[Diita]

Had the same problem, thx kd1. In my case i remove the TC97101P and with immo connected the car was not going to start. I removed the immo and dtc cleared and the engine starts with no problem.

[pajo]

i am remove tc97101p and immo box and car starts without problem

[Rhinoman01]

That looks to be different from the earlier Vitara with the Mitsubishi ECU but I will try it.
The Mitsu ECU seems to test the link between the micro and SEEPROM by reading 5AA5 from the SEEPROM and and then fail if thats not returned. The 00s seem to be just blank addresses, the ECU can store four key codes and doesn't use all the addresses.

[mcab]

CORRECT TITLE

Suzuki Grand vitara with denso ECU finaly started by removing chip from ECU.....

Just to summerise what we had done:

We were getting error code 83 which indicates a fault in communication between ecu and immobilizer and the grand vitara is a year 2000 tdi with a denso immobilizer.

We checked all the wiring twice over and was ok.

We thought the immo maybee faulty so we
kept the same ecu in the suzuki (picture enclosed) and put an identical immo bought into the car and swapped the chips shown in the picture of immo enclosed, from the original immo to new to hopefuly sync them up (ecu to new immo).
This did not work

We then thought the ecu could possibly be faulty so kept the original immo and changed the ecu for an identical one we bought but swapped the chip containing the pairing immo info from original ecu into new ecu. (top left 8 pin chip TC97101P) This did not work.

In the end what did start the car was removing and leaving the TC97101P chip of stangely enough.

Removing this chip allowed the new and old ecu units to work with either of the two immos (using the correct key for the immos of corse).

Maybee the ecu chip with the correct info was corrupt in both ecus so was not allowing the ecu and immo to sync with the correct pairing code in ecu? And without this chip in the ecu it was seeing either immo as the correct one as it did not have a code to compare either immo info as wrong against?

I have added the reading from both ecu chips (TC97101P)
to see if they look correct or corrupt, not sure if the parts of the reading in 00s indicate this.

We have been trying to get this car to work for a while and were told the only way to pair the immo to ecu were a ?2000 tech 2, now we are trying to figure why the car has now started ? If anyone has any idea or knows why this has worked would be very interested to hear?


Hope this helps anyone else who have had problems with this car started.

Thanks kd1

Thank you Kd1 worked a treat for me ! removed chip from ECU & removed immo box turned on ignition & cranked no start . disconnected battery for 2/3 min reconnected battery and started first time! Thanks again.

[Stufan24]

Thanks. Great work

[Tdmice]

So this works ok and isn't too difficult?

[darrenhyland]

I can confirm removing the eeprom and disconnecting silver mitsubishi labeled immo box located above accelerator pedal works 1000%!!!!!!!!!!!