[davidb95]

HI GUYS,

i searched everywhere for a few months now and just can not find out what is going on.

i have a 2007 bmw 335i e92.

to start off, my ecu box under the hood got rain into it, and the DME went bad so the car would not start. i took it to the dealership and they put a brand new DME into the car with a brand new engine harness. they say that the car can not read or communicate with the new DME ? What can the problem be! arghhhhhh.

after this, just to see if maybe SOMETHING ELSE WILL WORK, i even went ahead and bought a used DME with CAS module and key FOB. i put it in and the car cranks but doesn't start. we tried to program the car but it WOULD NOT COMMUNICATE WITH DME. ERROR in INPA

we can code everything else in the car. everything works while using INPA. but when you try to code the DME itself an ERROR pops up.

[davidb95]

Also after this happened my ABS, DSC, and Fuel pump light went on, and maybe some other lights not sure. I was thinking it may be the BLUE RELAY right next to the DME, i bought it and will try in a few days.

[js335in54]

check the fuses.. fuses for obd port... etc.

[davidb95]

Originally Posted by js335in54

check the fuses.. fuses for obd port... etc.

all the fuses were checked and they are good.

[js335in54]

Originally Posted by davidb95

all the fuses were checked and they are good.

connect to another battery make sure you got enough pwr when trying to read the ecu module
sometimes when the battery has low volatge some modules cant be read...

[davidb95]

Originally Posted by js335in54

connect to another battery make sure you got enough pwr when trying to read the ecu module
sometimes when the battery has low volatge some modules cant be read...

when the dealership programs, they plug up an additional source of power to the cars terminals. and it still did not work. i can try with more power but that may not be until saturday

[Dtype]

Check DME relay...

[davidb95]

Originally Posted by Dtype

Check DME relay...

just bought a DME relay, hopefully that works. ill install it the beginning of next week.

[makkan00]

Originally Posted by davidb95

just bought a DME relay, hopefully that works. ill install it the beginning of next week.

Have you checked
- if you have any aftermarket module fitted. On e93 roof modules break the communication b/w dme and obd.
- ews manipulation / sync error
- battery safety terminal (rule out that as well)

[davidb95]

Originally Posted by makkan00

Have you checked
- if you have any aftermarket module fitted. On e93 roof modules break the communication b/w dme and obd.
- ews manipulation / sync error
- battery safety terminal (rule out that as well)

i do not have any aftermarket modules.

what is this, i heard of it but don't know enough about it--ews manipulation / sync error?

when we plugged up the code reader(BMWHAT) computer to the obi, we got a code for battery safety terminal. we tried to clear it but it would not clear. the bst cable did not explode, i checked its in great condition.

[Sensible_]

When you put in a used CAS / DME pair did you reprogram? Do you get any dash warnings when trying to start the vehicle?

How do you know the used modules you bought are not fried? Were they tested? Can you communicate with DME at all with any diagnostic tool? What is the exact error INPA gives you.

A user called ramspeed had a similar problem a couple of weeks ago. It turned out to be a severed ground from the engine block. He diagnosed this with a simple multimeter and some time

[davidb95]

Originally Posted by Sensible_

When you put in a used CAS / DME pair did you reprogram? Do you get any dash warnings when trying to start the vehicle?

How do you know the used modules you bought are not fried? Were they tested? Can you communicate with DME at all with any diagnostic tool? What is the exact error INPA gives you.

A user called ramspeed had a similar problem a couple of weeks ago. It turned out to be a severed ground from the engine block. He diagnosed this with a simple multimeter and some time

i cannot communicate with the dme at all because every time i try to get around it, it always pops out the the DME cannot respond or communicate.

i do not have any dash warning lights except like the abs,dsc, but never even a CEL.
the used DME and used CAS are both in working order. came off a vehicle that ran. also i know the CAS works because the car cranks when i push the button.

i can't tell you the exact code because i don't remember, i should've wrote it down, but ill see if i can get them next week.
how do i check if a ground is missing?? i want to try it

[Sensible_]

I'm on a mobile device so can't copy and past link. The thread is a couple of pages down in this forum. It's titled something like, "Help. Car won't start". Go straight to the end.

[alfonsec]

Originally Posted by Sensible_

I'm on a mobile device so can't copy and past link. The thread is a couple of pages down in this forum. It's titled something like, "Help. Car won't start". Go straight to the end.

Bringing this thread back from the grave as I have a similar issue and cannot find the referenced post. Any solution?

[Levanime]

Originally Posted by alfonsec

Bringing this thread back from the grave as I have a similar issue and cannot find the referenced post. Any solution?

give us all details,

what car, what model,
when it happened,
after what event,
do you have communication with DME? (how do you test)
whats battery voltage
etc
even small details can be important

[alfonsec]

Originally Posted by Levanime

give us all details,

what car, what model,
when it happened,
after what event,
do you have communication with DME? (how do you test)
whats battery voltage
etc
even small details can be important

2005 e90, happened after swapping the engine out for another one (same engine type), no communication with the dme. Swapped dme with one that was programmed to match security system and still no communication with dme according to ista. swapped the main relay still no luck.

[Levanime]

what engine? what DME?

[alfonsec]

Originally Posted by Levanime

what engine? what DME?

I swapped a m54 for another m54. The main ecu is the one which is showing no communication and also what was replaced but still shows the same things. CAS was matched to the DME and there aren't any errors related to it that are showing up

[Levanime]

As I remember there was no M54 in E90,
are you sure its M54? what model is DME? MS45.1? or MSD80

[alfonsec]

Originally Posted by BimmerGeeks

He's 335, I'm sure he means N54 not M54.

I'm sorry, had a brain fart. It's an e60 (2005 530i) so the engine is a m54

[Gcode]

Did you get this resolved?

I'm local and can help you.

Originally Posted by alfonsec

I'm sorry, had a brain fart. It's an e60 (2005 530i) so the engine is a m54

[alfonsec]

Originally Posted by eL fUcHiLa

Did you get this resolved?

I'm local and can help you.

I haven't messed with it but any help would be greatly appreciated