Thread: Fault Codes after ECU upgrade

Depends what fault codes.
The EGR valve stuck open ones and A/C fan open load etc etc aren't important, and can be thrown up due to the fact that some vehicles aren't configured for that setting etc.

The Ambient air sensor, MAF, Injector open circuit, Driver demand circuit error etc are important ones, and need to be investigated if it is YOUR vehicle that is causing them.

JC

Thanks for the input...

The codes are in a group of 8, repeated 4 times.

AC FAN DRV O/T (over temp)
FUEL PMP DV O/T
TACHO DV O/T
GEARBOX/ABS OUTOUT DV O/T
AC CLUTCH DV O/T
MIL LAMP DRV O/T
GLOWPLUG RELAY DRV O/T
GLOWPLUG LAMP DRV O/T

The first set is " logged"
Second time all the same but OPEN LOAD errors not over temp, and "logged"
Third time same as second, but "current"
Fourth time same errors as third set !!!

The groups of 8 have numbers 8,1 to 8,8...then 10,1 to 10,8...12,1 to 12,8...14,1 to 14,8

What the????

Has anyone else had this with late ECU and a TRS upgrade.

I had a clear code reading from the test prior to the ECM upgrade. It was done when I had the injector loom done as a precaution.

Any insight most welcome...thanks...

There are generaly 3 reasons fof these faults to be there.

1st the faults do actualy existin the ecu

2nd Or are part of the tipical TD5 ghost fault codes that do come and go as and when on some cars.

3rd and most likley IF they were not present before tuning, The mapping done to the ecu is WRONG for the ecu part number and a generic (one fits all) mapping had been done.
Its not a problem if the car is running good but in some cases the conversion of mapping does cause pages of faults like this.

Regards Pete

Originally Posted by B-A-S

There are generaly 3 reasons fof these faults to be there.

1st the faults do actualy existin the ecu

2nd Or are part of the tipical TD5 ghost fault codes that do come and go as and when on some cars.

3rd and most likley IF they were not present before tuning, The mapping done to the ecu is WRONG for the ecu part number and a generic (one fits all) mapping had been done.Its not a problem if the car is running good but in some cases the conversion of mapping does cause pages of faults like this.

Regards Pete

Thanks Pete, that explains the O/T errors, I haven't come across these before, only the A/C drive EGR ones etc.

JC

Your welcome.

When you get the means to ID or read the fule tune from the ecu with nanocom or simlar, give me a nod and refesh my memory and ill tell you if the correct mapping for the ecu type has been installed.


Regards Pete

Hey Guys

Sorry to hijack the thread, but is there anywhere that specifies the fault codes and gives some likely cause for that fault? I have the list of the codes, but would have no idea what causes them (mainly due to my lack of mechanic knowledge) but would be happy to investigate if I knew what I might need to look for...

Maybe this is something we could compile in a thread here?

Angus

Google is a good a place ans any for converting P codes into words.


Regards Pete

Thanks for the info... cheers B-A-S...

I cleaned the MAF,AAT, and plugs. No comtamination evident, but the MAP/IAT was covered in a black sooty film.

Car seemed a little better but may have been wishfull thinking.

Still not the power gains I, or the mech expected. He felt it was better than std , but not as good as others he had done.

The codes were not there before the tune. ECM was swapped for one off the shelf. Fits with your third hypothosis B-A-S....tried to get my ECM back but no luck.

What other things/sensors should I look at?

Can I test sensors for correct operation to ensure the ECM is not using a default value? I have a WSM with volt ranges in a table, is this the way?

Local suplier was out of Nanocoms... bugger... will read fuel mapping info when I can....


Thanks again...