Thread: Help needed to understand Nanocom EVO Codes from my D2 Td5

Hi Chris

That's a mighty ugly looking MAP sensor.

I'm not familiar with those codes, but I'm sure Offtrack will wander past soon with some solid advice Is the P code off the transmission? I don't recall the Td5 ecu logging P prefix codes.

Posting the nanocom log file will certainly help.

In the meantime, if you haven't already done so, it certainly wouldn't hurt checking the red ECU plug for the ole oil in wiring loom and also the MAF wiring back to the ecu. The insulation will get brittle in old age due to the heat of the engine bay.

Cheers

Steve

I'll start by saying I'm not up on what the codes relate to
But for the sake of starting the conversation...

The serge at 40Km/H is typical of oil in the ECU having oil across the contacts at the red plug.
Keep cleaning it as you have the new loom it may just be what was left in the main loom.
It is exactly what mine did.

The M &S lights without the transmission shifter light is a hint at low battery voltage.
They often go away a second start as the battery then has a surface charge.
Check the battery connections ect and get it tested.

Driver demand may be related to the above also.
I also have been told but not confirmed that shifting from Rev to Drive while rolling may bring this on to(can anyone confirm this?).

The MAP sensor is not unusual as oil fumes from the rocker cover are "vented" through the intake system.
Once hot with the assistance of a leaky/working EGR valve it turns to near on tar
This is one reason some fit a Provent system, I haven't because I like the oil lubricating things a little.

Cheers, Kyle.

Unless you had the whole harness replaced, oil will continue to migrate down to the red plug for a while.
Just have to keep checking and cleaning it.
Second what alien said about M/S lights and batteries.

Originally Posted by Rok_Dr

Is the P code off the transmission? I don't recall the Td5 ecu logging P prefix codes.

Thanks for the responses guys.Yes that P code was from the transmission.I'll check the oil in the loom again tomorrow.I only checked and cleaned it 2 weeks ago I'll also post the nanocom log file.I've got no idea how to read it and what it means though

Originally Posted by SPROVER

Lately it has had the M and S and engine light come on and then throttle cuts out completely.It has had the injector loom changed about 5,000km ago but when I checked the ECU there were traces of oil there.Cleaned it all up and used contact cleaner on the AFM and it would run fine for a week or 2 before the same codes popped up.

Opps had my"red wine before dinner blinkers" firmly applied ignore my ecu comment.

X3 a weak battery.

Here is the file I recorded on a short run.Hope it works.Regarding the battery issues, when checked on the Nanocom its reading a steady 14.3 volts and around there.

The P1884 codes relate to CANBUS communication between the Td5 ECU and the autobox ecu. In this case it's reporting that the Td5 ECU has a Throttle position fault logged. The Autobox uses throttle position information to help determine shift and TC lockup points so logs a fault if this data isn't available. The troubleshooting procedure for this is to check the Engine ECU for throttle related faults and rectify.

The driver demand faults are normally related to throttle position sensor.

So you have three faults pointing to the TPS, which is going to be your prime suspect. The recording doesn't show any sign of the TPS fault but as it sounds like the fault occurs intermittently that isn't especially surprising. I'd suggest that you check the wiring harness between the ECU and TPS for damage - there may be a rubbed section.

It would also be worth recording the fuelling inputs with the ignition on but engine not running and repeatedly push the throttle pedal through full travel for a few minutes. What you are looking for is evidence to support the theory the TPS is stuffed.

It's likely that the TPS needs to be replaced, but you should eliminate other causes before you break out the credit card.

cheers
Paul

minus eleventybazillion a weak battery...

Originally Posted by OffTrack

The driver demand faults are normally related to throttle position sensor.

So you have three faults pointing to the TPS, which is going to be your prime suspect. The recording doesn't show any sign of the TPS fault but as it sounds like the fault occurs intermittently that isn't especially surprising. I'd suggest that you check the wiring harness between the ECU and TPS for damage - there may be a rubbed section.

It would also be worth recording the fuelling inputs with the ignition on but engine not running and repeatedly push the throttle pedal through full travel for a few minutes. What you are looking for is evidence to support the theory the TPS is stuffed.

minus eleventybazillion a weak battery...

Ok thanks for that Paul.I'll check it out today and get back with anything I find.Also what would the (3,7) AIR FLOW CIRCUIT relate to?
Cheers
Chris