coltron1 · Mar 5, 2023

Nodge68 said:
Glad it seems sorted.
From memory, you need to have the turbo actuator limit positions programmed into the ECM, or it can cause early failure of the actuator.

Thanks Nodge,

luckily the actuator fitted today is original to the car. The actuator I removed came with the replacement engine and was simply shinier too, (but possibly broken)... at the time I thought it would last longer, not cause problems haha, every day's a school day.

Am I right in thinking the ECU will try to adapt new components over a period of time? (assuming someone hasn't got the programming software)

Nodge68 · Mar 5, 2023

coltron1 said:
luckily the actuator fitted today is original to the car. The actuator I removed came with the replacement engine and was simply shinier too

In that case, it might be close enough not to cause long term issues.

coltron1 said:
Am I right in thinking the ECU will try to adapt new components over a period of time

The ECM will learn fueling and emissions characteristics over time, but it can't learn turbo actuator, throttle valve positions or injector compensation values.
These items need programming into the ECM for optimum performance or component life.
However I expect loads are replaced without programming, probably with only minor performance losses.

coltron1 · Mar 5, 2023

Programming wise the lr2 scan tool can recode ECM for replacement injectors and do a new battery reset, I'm not aware of much else?

Nodge68 · Mar 5, 2023

coltron1 said:
Programming wise the lr2 scan tool can recode ECM for replacement injectors and do a new battery reset, I'm not aware of much else?

I'm not sure what non LR diagnostic equipment can do it, as I've not checked.
JLR SDD can do everything, and isn't that hard to get or difficult to use.

coltron1 · Mar 6, 2023

Good to know. I was surprised to find nothing relating to the turbo actuator on the iscan LR2
v2...but maybe the actuator wasn't visible to the system because it was duff?….I will have a nother scan to check that.. cheers

coltron1 · Mar 7, 2023

Couldn,t find any reference to the Turbo actuator on the iscan LR2..but everything appears to be working apart from throttle body, which has lost its position signal..so I fitted another (off spare engine) and no more engine codes for now...HDC fault has popped up, which appears to be front left tone wheel playing up... I've got 2 new wheel bearings to fit so with any luck the drone and the ABS fault will be sorted in a one,er

coltron1 · Mar 25, 2023

Front end drone and HDC fault have gone since fitting new front bearing/hubs..The abs reluctor is actually part of the wheel bearing itself...Car still running ok and not cutting out..though sometimes, at standstill, the idle revs will slowly drop to near stalling, then suddenly jump back to 750rpm (normal idle revs?) ....no engine fault codes, but live O2 sensor readings arn,t correct on my scanner...anyone had the same issue?

Nodge68 · Mar 25, 2023

coltron1 said:
will slowly drop to near stalling, then suddenly jump back to 750rpm (normal idle revs?)

Idle speed is normally set it 750 + or - 5 RPM. There is the facility using SDD to alter it between 725 and 775 RPM, to eliminate a particular resonance should one occur on the vehicle.

For idle speed instability, monitor EGR percentage and throttle valve percentage, as a change in either outside of EGR control will upset running.

coltron1 · Mar 25, 2023

Nodge68 said:
Idle speed is normally set it 750 + or - 5 RPM. There is the facility using SDD to alter it between 725 and 775 RPM, to eliminate a particular resonance should one occur on the vehicle.

For idle speed instability, monitor EGR percentage and throttle valve percentage, as a change in either outside of EGR control will upset running.

Thanks Nodge, will check those out.

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