As it's a 1996 car the ECU giving the error code will be the GEMS ECU located next to the battery. There are many different "tunes" loaded depending the year of manufacture & destination market for the car when first shipped from factory. Read the attached Land Rover "GEMS Systems" document.
There are aftermarket companies that offer "security disable" ROM's for the ECU which bypass the security features. If your car has been modified or tampered with, then this is also a possibility.
Most likely is the EPROM has simply become corrupted (usually someone tampering), hence why you are getting the P0605 fault. This same code applies to lots of different engine ECU's across most manufacturers.
The easiest process is to read the existing ECU & note the values. Then try the same with the other ECU's you have. If you want to try starting the car with any of them, you will probably need to do the security re-learn.
This is how the BECM <--> GEMS security works. No need to mess with the BECM.
Another clue to modifiactions to the GEMS ECU is to ready the stored settings.
There are aftermarket companies that offer "security disable" ROM's for the ECU which bypass the security features. If your car has been modified or tampered with, then this is also a possibility.
Most likely is the EPROM has simply become corrupted (usually someone tampering), hence why you are getting the P0605 fault. This same code applies to lots of different engine ECU's across most manufacturers.
The easiest process is to read the existing ECU & note the values. Then try the same with the other ECU's you have. If you want to try starting the car with any of them, you will probably need to do the security re-learn.
This is how the BECM <--> GEMS security works. No need to mess with the BECM.
Another clue to modifiactions to the GEMS ECU is to ready the stored settings.
thanks everybody! Printer for that 4.6. I have to read carefully because my language skills are limited.(=bad) If I hadn't connected Icarsoft V2 to the obd port and read the fault codes, I wouldn't know anything about this fault. The fault light does not come on when running. Now it looks like I'll have to get myself an NCOM05. I don't think the current Icarsoft is enough for this.
However, I still check the ECM current and grounds. There's nothing wrong with them, of course?
However, I still check the ECM current and grounds. There's nothing wrong with them, of course?
Datatek
Well-Known Member
I was talking about the BECM I assumed ECM was your abbreviation. However, if you are talking about the engine control module, as pwood999 has explained above, you cannot just go swapping EPROM's around, because the code they contain (firmware) comes in many different versions. You also need the correct soldering equipment, a 240 volt iron may cause damage due to eddy currents at the tip and strictly speaking earthed wrist bands should be worn to avoid static damage to the chip.
Does the iCarsoft read all the settings, etc ? If it does then grounding must be ok, or it would not communicate.
Those memory chips are replaceable without soldering, that's where my idea of a possible replacement with a chip borrowed from another ECM came from. Why would you have bothered to do without a soldering iron...
When I solder semiconductors, I use a Weller TCP soldering iron.
Yeah, yes Icarsoft is communicating, but I'm not sure if it does what is needed.
When I solder semiconductors, I use a Weller TCP soldering iron.
Yeah, yes Icarsoft is communicating, but I'm not sure if it does what is needed.
Datatek
Well-Known Member
Plug in chips on the engine ECU? Never seen that unless modified chips have been fitted, normally soldered in. The Weller TCP is good.
Now that I've browsed the sites ECM (ECU) upgrade Chip Would this also seem to be an alternative solution to my problem? For example, Britpart publishes a 3-page guide to replacing chips. If my problem is precisely in those chips, would it go away if I install those chips, or is the fault written somewhere else inside the Ecm.. The price is of course high...
If it is your problem the Tornado chips would sort it I would think. Are they plug and play or do they need some setting up with diagnostics. I haven't looked at them for a long time.
If I remember they are about £500 +vat.
You may do better value for money and buy a Nanocom plus an old Gems ECU fit it change the settings.
Or at least, you have a Nano to check in deeper first.
J
If I remember they are about £500 +vat.
You may do better value for money and buy a Nanocom plus an old Gems ECU fit it change the settings.
Or at least, you have a Nano to check in deeper first.
J
You best open up the ECU's you have and check if they have the EPROM in a socket or soldered to the PCB.
Plug & Play is not quite true, unless they have also disabled the security code exchange with the BECM. This is generally used when installing the ECU in a non-P38 car such as old Morgan, etc. As I said above, if the security modes are still enabled, then you will need Nanocom to re-learn the codes.
Try reading the ECU using your iCar****, and see what data is there ?
Plug & Play is not quite true, unless they have also disabled the security code exchange with the BECM. This is generally used when installing the ECU in a non-P38 car such as old Morgan, etc. As I said above, if the security modes are still enabled, then you will need Nanocom to re-learn the codes.
Try reading the ECU using your iCar****, and see what data is there ?
I had the ECM open a while ago. Under the plastic protective cases they are indeed on stands, not soldered, also this ERR-5760 which is from my car. There is also a third chip, which is just pressed into its slot, exactly square, the size of a sugar cube, with a small tape on it that says: Warranty void if removed.
You must be right, I need to get NCOM05 and learn how to use it for this case. I have read what I have found in the ECM box. It apparently has two sides A and B. I have a problem with the A section. It may well still be that there is no more serious damage. Now it's cold outside, it's a few degrees below freezing and windy here, snow is coming, next week it will be warmer, I'll measure the currents and grounds of the box and do the first simple test I got on 16.4. from this site.
Can anyone sell me an NCOM05??
You must be right, I need to get NCOM05 and learn how to use it for this case. I have read what I have found in the ECM box. It apparently has two sides A and B. I have a problem with the A section. It may well still be that there is no more serious damage. Now it's cold outside, it's a few degrees below freezing and windy here, snow is coming, next week it will be warmer, I'll measure the currents and grounds of the box and do the first simple test I got on 16.4. from this site.
Can anyone sell me an NCOM05??
Datatek
Well-Known Member
He said Finland but in his profile would be helpful.
I thought I saw that but it’s a PITA to keep going back.
Finland ,Greece eu postage and customs don’t seem an issue to me?
J
