1998 Volvo S70 T5 ECU identification ?

pyp007 · Post by **pyp007** » 27 Jun 2012, 02:21

Hi All, How do i identify my ECU ? On the label there is a large number 3.2 on it. Any help please?

Post by **jimmy57** » 27 Jun 2012, 09:49

Bosch number is on that label under the word "BOSCH"
It will be something like "0 261 204 610" (that is for a low pressure turbo GLT ECM), the first digits on yours are likely the same and the last three are different.
Under the top left bar code will be the Volvo part number and will be something like " P09155785 " where the "P" and the "0" are dropped to get the Volvo part number 9155785. Again that part number is from an ECM I have here with me for the GLT.

What problems do you have that lead to ECM needing to be replaced?

pyp007 · Post by **pyp007** » 28 Jun 2012, 05:52

Thanks for the reply. My friend bought a 1998 V70 T5 that wont start. We tested Crank and cam sensor in my S70 and it worked. We tested the wiring to ecu and wiring from coil module. We tested his coil and module in my S70. We even put his immobiliser in my S70 and it started. His car dont get spark. I think his ecu dont give an output to the coil module. We also tried my ecu in his car but no starting.

pyp007 · Post by **pyp007** » 28 Jun 2012, 06:07

The owner of the V70 replaced the key antena and made a new key and had it programmed by volvo. He said the car start for 2 days and then lost programming. Will it help if I test my S70 ecu and immobiliser in his car and hold my key close to his key antena? Is there a way to bypass his immobiliser?

Andriusk · Post by **Andriusk** » 13 Jul 2022, 22:32

I am having now this same problem but I live in South America and local Volvo dealers just support 2010 and newer vehicles so going there Is not an option for me. How did your friend solve the problem?
My stock ecu is 0261204448
Engine crank but no spark, no Fuel pump and no pulse on injectors

Post by **Chuck W** » 03 Aug 2022, 20:54

Andriusk wrote: ↑13 Jul 2022, 22:32 I am having now this same problem but I live in South America and local Volvo dealers just support 2010 and newer vehicles so going there Is not an option for me. How did your friend solve the problem?
My stock ecu is 0261204448
Engine crank but no spark, no Fuel pump and no pulse on injectors

Did this just start happening?

Have you checked the main FP system relay that is located at the top of the radiator?