Ok lads I’m not electrically minded in the slightest, so I’m taking it that the 6 wires from the throttle valve go back to the pcm, please see pics, so I’m thinking if I isolate the 6 wires at the pcm and check continuity of each that will rule out a break in the wire ?? 
 

That's a fuse box. PCM under the wing left side. Wheel off, wheel arch off. Drill the temperproof screws out In a plastic box, PCM inside. It's 2 connectors on it with nearly 200 wires in total running to it.

Also worth noting continuity won't necessarily show you a poor connection.  If the wire is still holding on by one strand or even a broken wire touching when you test, that will pass the continuity test.

Why do you think there is something wrong with the Throttle Valve, and what does Live Monitoring with FORScan say.

I thought you said before it was doing what I said it would at Engine switch off.

if you look at the RPM when the code is activated, its only on shutdown, i have changed the TV and still the same 

8 hours ago, Phantom76 said:

thanks @ssmith93 i take it that this is where your on about ?

 

Yep that's it, will have a code in the format XXXX-XXXXXX-XXX.

so i was talking to a m8 of mine that suggested making a TEMP loom of 6 mires and bypassing the wiring thats there already to see if it makes a difference, the only problem is i need to know where they end is it the fuse board or straight to the pcm under the wheel arch @Zen23@TomsFocus@Tizer would this be a viable option ?

It goes directly to pcm. It will be easier to check the wiring and load test it then run separate wires due to size of the plug. If it's delphi dcm6.1 then pin out diagram was in one my posts. When you will get to PCM you will see what I mean. 

@ssmith93 took pictures of pcm , it's the same location on focus. Check the wiring colour code of throttle body it might match might not.

 

i bit the bullet this morning and rang and auto electrician, waiting on him to ring me back with an appointment, this is gone over my pay grade and the wife is doing my nut in lol

ill update on the outcome 

update 

no joy with the electrics, auto electricion said all was ok with the wiring, he pointed towards the maf sensor but i have my doubts im totally at a loss now 😞  

what did he test and How did he test it?

Did he take pcm off and check the wiring from pcm?

Here is a video,  might be educational for some people. It shows where PCM and testing some of the wiring and the point of potential problem where wiring clipped to gearbox as you mentioned in some of the post.

 

update

still having the same issue at shut down. got another auto election to have a look from the pcm and found no wiring issues. so i let it go until i started noticing a humming noise coming and going like something was trying to a cycle. i think it might be coming from the egr cooler actuator (now this could be pie in the sky ) i disconnected the vacuum pipe from the air-filter housing and blocked it to see if it was pulling a vacuum from it.yep it was but the actuator did nothing so my thinking is that if the cooler bypass stayed open this would overheat the intake making the car run on and would it throw up that code ? 

TIA Phantom

can anyone please tell me which pid is used to see the throttle plate position in forscan please i thought it was TAC_PAC% but when i push the plate live data stays at 100%

TIA Phantom

 

1 hour ago, Phantom76 said:

can anyone please tell me which pid is used to see the throttle plate position in forscan please i thought it was TAC_PAC% but when i push the plate live data stays at 100%

TIA Phantom

 

I'm not sure for that Engine but try a search for Throttle Valve or TV. 

In the 1.6 TDCI it was actually called EGR_TV (Throttle Valve), which put a lot of people off because it only has a loose connection with the working of the EGR and no physical connection whatsoever.

Finally found it 🙂 FYI it comes under pcm.tp(%) on the 1.5 diesel 

so on forscan its i can see the results of the throttle body 

if i move the plate manually you can see the values change accordingly 
also you can see that the car on shut down sends the command to close the throttle body but that dont happen 
as you can see by the graphs 
3rd pic is with the throttle valve disconnected

any ideas ???  

















 

8 hours ago, Phantom76 said:

Finally found it 🙂 FYI it comes under pcm.tp(%) on the 1.5 diesel 

so on forscan its i can see the results of the throttle body 

if i move the plate manually you can see the values change accordingly 
also you can see that the car on shut down sends the command to close the throttle body but that dont happen 
as you can see by the graphs 
3rd pic is with the throttle valve disconnected

I've lost track of what the original problem was and if it is still the same now.

I don't have much knowledge of the 1.5 Engine fitted to your car but normally the Throttle Valve on Diesels part closes when a DPF Regeneration is happening and if it doesn't move then the DPF soon gets full and/or a Fault Code comes up.

The other thing that it normally does on a Diesel Car is to part close on the overrun for a few seconds, such as when changing Gear to draw more EGR into the Cylinders. This can easily be Live Monitored with FORScan and the car moving.

If you are certain that it is not moving and it is not faulty then checking the continuity back to the PCM would be wise.

I remember reading on this Forum of someone having the same problem with a Mk2 and his Wiring was broken because it ran under the Battery and some Battery Acid  must have leaked onto the wiring. In that case it was only visible after removing the outer sleaving from that part of the Loom.

10 minutes ago, Tizer said:

I've lost track of what the original problem was and if it is still the same now.

I don't have much knowledge of the 1.5 Engine fitted to your car but normally the Throttle Valve on Diesels part closes when a DPF Regeneration is happening and if it doesn't move then the DPF soon gets full and/or a Fault Code comes up.

The other thing that it normally does on a Diesel Car is to part close on the overrun for a few seconds, such as when changing Gear to draw more EGR into the Cylinders. This can easily be Live Monitored with FORScan and the car moving.

If you are certain that it is not moving and it is not faulty then checking the continuity back to the PCM would be wise.

I remember reading on this Forum of someone having the same problem with a Mk2 and his Wiring was broken because it ran under the Battery and some Battery Acid  must have leaked onto the wiring. In that case it was only visible after removing the outer sleaving from that part of the Loom.

still the same issue 

i was just looking that the post your on about and somebody posted a pic where the break in the wires was but i cant make if it was looking from underneath or from the top down. i have 5v going to the motor and im assuming the ground is ok because when i flick the ignition on i can feel the throttle plate tighten up. 

anybody that's had this problem able to just point to a general area where they found break in the wires ?? seems the 2 plonkers i gave the car to are twats and there is defo an earth wire broken 
please and thanks 

so after more investigations ive found that the wiring is intact as far back as the earth cable joins the harnes. so now im suspecting that the pcm is bad. is there anyway way to do a diagnostic check on it with forscan ? i have done key on and off test but after that im lost. 

question 2 if he pcm is bad what info do i need and when would be the best place to source 1 ? or is repair even worth it 

so i have a constant earth when the car is asleep but when car woken from slumber it has a bad earth. PCM gone ?? it also dose it to the TMAP sensor earth as well

 

1 hour ago, Phantom76 said:

so i have a constant earth when the car is asleep but when car woken from slumber it has a bad earth. PCM gone ?? it also dose it to the TMAP sensor earth as well

 

A PCM often switches circuits by having a constant Positive supply and completing the Earth circuit rather than the other way around. I don't know for sure if that is the case with your car or not but I would think there is a good chance that it is.

Normally only Turbo charged Petrol cars have two MAP Sensors, one before and one after the Throttle Plate, and it is a true Throttle in a Petrol car, and one of them has a Temperature Sensor, hence the name TMAP.

In the event that your car did have two then FORScan would almost certainly be able to read Live Data from them both, one may be called Boost and its readings would not be exactly the same as the MAP readings.

my map sensor has a boost temp sensor in it thats why i called it tmap sry my bad only 1 sensor on my yoke not 2 😞 

this has my head fried