seasider

Cheers. Is it the case then that the ECUs are the same for the 276 model, the 287 are the same, the 306 the same. So as long as it is from a 276 model it would be ok?

Does anyone know if an ECU from a 2005 350z would work fine in a 2004 (54) 350z? There was a model change in 2005 from the previous model with an increase in power etc.

Flirt I have pm'd you

Alex, apologies if I came across as not taking the advice on board. I definately did hence my confirmation with the garage on the unit being dead and the diagnostic procedure listed on an earlier page being followed. I am also in a poor mood at the moment because of the cost so that may have inadvertantly come across in my messages. I am very appreciative for the advice given on this thread. I was simply trying to explain that the unit had been confirmed as dead. I have the same cynicism with the ECU being the cause of the problem as Nissan also told the garage that they have never had to replace an 350z ECU for a manufacturing fault. However the ECU is now dead so my worry is that the ECU has been damaged by a jump start. If this is the case it was either the recovery guy or me that did it. There were no sparks when jumping so i guess all that could have happened is a voltage/ampage overload from the other car when jumping. Therefore there will be another fault once we fix the ECU. Thanks for all the advice and if it turns out I am the first person to have a genuinely failed ECU unit I will post on here to let people know.

ZMANALEX it is not a case of a second diagnosis anymore. I have been and seen the errors myself. The unit is definately dead. They have run all the diagnostics people have listed on here and more and they all indicate a dead ECU. It has been confirmed by Nissan central based on the information provided. Unless someone knows more than Nissan do about the 350z ECU. The only outstanding question is whether the ECU was dead before I came to start the car on Monday or the problem was something else and along the way the ECU was killed. The only way left to deduce this will be if when the new ECU is fitted if the car then works it indicates the ECU was dead before I came to start it and I have then have grounds with Nissan. If when the ECU is fitted it higlights another problem then the ECU has been killed through me/recovery guy trying to get the car started.

The plot thickens with this. Nissan have come back and said they will not pay anything towards the ECU as they have never had an ECU fail on a 350z and think it has been caused most probably by trying to jump start and there being a spark causing the unit to short out. The car was tried to be jump started a few times by myself and the recovery guy. I don't recall any sparks and it does seem over sensitive that this would cause the issue but c'est la vie. Therefore what is likely is that the ECU has failed on top of their being a lower level fault that we cannot find because of the failed ECU. Great.

When trying to resolve the problem yesterday we had the battery off for about 2 hours as initially I was confirming whether it was a flat battery. Then after reconnection we got the 0605 error code. The AA guy also got this after lots of experimenting (I was actually quite impressed with the AA guy which was surprising as for once he knew what he was doing) as did the Nissan garage. I am not sure if they tried the procedure below so will ask this. Thanks for all the advice though guys it has been really useful. I will be speaking with the garage later after they have discussed directly with Nissan. I will get the assurances but I cannot see another next step than a new ECU going in with an agreement that I am not paying for it if it does not fix it. If it does fix it then I am going to get heavily onto Nissan for some money back from them. All in all has put me off Nissan's for life which is a shame.

I am based in Manchester but cheers for the offer. I am waiting on Nissan coming back with hopefully an offer of reduction as this should (a) not be happening after 4 years on any car and ( not on a car serviced to the letter in one of their dealerships. A close relative also works for Nissan so we have a lot of the cars in the family so as valued customers for many years I would expect some goodwill and I will be taking it up in writing with Nissan directly should I need to. As for guarantees for the work then I will not be paying anything for an ECU if it proves not to be the problem. The old one will be swiftly put back in. This will definately be explained to the dealer. Let's see what tomorrow brings...sighs...good job I have already bought Christmas presents or christmas would be cancelled!

Easier said than done. I have a car that I cannot move stuck in the Nissan garage. To get in towed for another opinion is going to cost £100+ just for the tow.

Got a call from Nissan. New ECU needed. 1600 quid fully fitted. Trying Nissan to see if they will give a discount as a gesture of goodwill for full service history etc.

If it is a "goosed" ECU anybody any ideas on what they cost roughly?

I have just tried the manual reset myself whilst waiting for the pick up lorry and got all the right flashing lights but aftet the reset it is still doing the same and not starting. It gets so close to starting it is almost unbearable. It really is the last part of the ignition sequence that is not happening which I guess is where the ECU comes in.

Yeah he plugged in and scanned for OBD codes. The code was 'P0605 Internal Control Module ROM Error'. Which from what I can find is ECM/ECU related. He did a reset on the unit a couple of times and re-tried to start it and kept getting the same code. I guess the Nissan dealer may be able to take it another step further.

Hi, My 350z would not start this morning. It turns over but just does not seem to spark or fire. I have had the AA out and they think the ECU has gone as an internal error code is being reported by the engine and everything obvious like power to the ECU, power in the battery, fuses etc seem ok. Great news before Christmas if this is the case. Has anyone else had any similar problems? Also does anyone know what it costs to replace an ECU in a 350? I am bracing myself for it being expensive. Cheers, Glenn

Thanks. Will do in the morning or later this evening.