Engine cut out and wont start now.

[rudeboyraz]

There was a code
03156 - Sensor for Anti-Theft System (G578)
No signal communication 004
Could that be stopping it from starting?

 

[rudeboyraz]

Hi so my T6 died on me whilst driving it. No prior warning, just konked out after the coil light flashed a couple of times and message to start manually on instrument cluster and now won't start I've posted the fault codes that come up after I've cleared the historical ones.

View attachment 201591

Could these codes be stopping it from starting? By the way I really appreciate all the help

 

[rudeboyraz]

What does VCDS report for
IDE00182 Camshaft adaptation intake bank 1: phase position ?

I didn't mange to do it on the VCDS but on autel it was 2.5

 

[mmi]

I didn't mange to do it on the VCDS but on autel it was 2.5
View attachment 202433

Ok - not the culprit then I guess.

There was a code
03156 - Sensor for Anti-Theft System (G578)
No signal communication 004
Could that be stopping it from starting?

No - it does not prevent starting.

there was no fuel pressure - ECU did not even to try to fire the injectors (Main injection: duration of activation = 0).

Need to sort out why there is no fuel pressure build up during the cranking - the engine can't start without fuel.



The IDE00589 Fuel pressure should climb up above 30000 kPa instantly (something like in 0.3 seconds when cranking).
See an example in the linked post below

Won’t start [Resolved]

T6 204 diesel. Van was used on a long drive and then a trip to the shops. It was left 5 mins and then wouldn’t start. Turns over but doesn’t fire. no fault codes. There was a slight burning smell when I parked up and it looks as if the front egr pipe has a crack, rear one has already been...

www.t6forum.com

 

[rudeboyraz]

Hpfp? Can I test it using VCDS?

PO69000 passive/sporadic ECM/PCM Power Relay Sense Circuit high

P24D000 passive/sporadic
Particulate Matter Sensor supply
voltage,Circuit Low

P208C00 passive/sporadic
Reductant Pump 'A' Control Circuit
Low

Could these codes be clue into not starting?

 

[n10n]

Hpfp?

Lift pump or the pressure sensor also comes to mind. Just guessing though.

 

[mmi]

Hpfp? Can I test it using VCDS?

No, not really.
However, the control signals were correct for both fuel pressure controller and lift pump - in your logs - of course they do not guarantee that actual operation is correct.



Fuel lift pump can be run by VCDS -
VCDS > Engine > Output test > Fuel pump electronics
During the test the pump makes a distinctive sound (on left side of vehicle).

Some more details here:

Start up fault

Really happy with the help so far - have never received any remotely useful input from the dealership. But in there defence they never observed it faulting first hand only my videos. VCDS has been fantastic so far - only my inexperience limiting it. Reading the comments on the time stamps does...

www.t6forum.com

PO69000 passive/sporadic ECM/PCM Power Relay Sense Circuit high

Do you still get this??
It was not present in your scan of Wednesday, 17:20.
Would be a candidate if present.

P24D000 passive/sporadic
Particulate Matter Sensor supply
voltage,Circuit Low

P208C00 passive/sporadic
Reductant Pump 'A' Control Circuit
Low

No - they do not affect starting.

 

[rudeboyraz]

No, not really.
However, the control signals were correct for both fuel pressure controller and lift pump - in your logs - of course they do not guarantee that actual operation is correct.

View attachment 202456

Fuel lift pump can be run by VCDS -
VCDS > Engine > Output test > Fuel pump electronics
During the test the pump makes a distinctive sound (on left side of vehicle).

Some more details here:

Start up fault

Really happy with the help so far - have never received any remotely useful input from the dealership. But in there defence they never observed it faulting first hand only my videos. VCDS has been fantastic so far - only my inexperience limiting it. Reading the comments on the time stamps does...

www.t6forum.com

Do you still get this??
It was not present in your scan of Wednesday, 17:20.
Would be a candidate if present.


No - they do not affect starting.

P069000 was there after it stopped running but hasn't been back since clearing

 

[rudeboyraz]

Any suggestions as where to go from here?

 

[mmi]

P069000 was there after it stopped running but hasn't been back since clearing

So no codes in engine now?

Any suggestions as where to go from here?

Did you run the fuel lift pump - does it make audible sound?
VCDS > Engine > Output test > Fuel pump electronics

I guess next would be to check that lift pump actually works - by checking fuel flow at fuel filter outlet.

---

T6 & T6.1 - Diesel Fuel Supply System Workshop Manual

Workshop manual covering fuel supply system for all diesel engined vehicles This document covers removal/installation of system components like tank/pump/filters etc and also covers misfuelling procedures VIP Membership is required to download...

www.t6forum.com

 

[rudeboyraz]

There's fuel to the fuel filter and I can hear the pump.

 

[mmi]

There's fuel to the fuel filter and I can hear the pump.

That's good... hmmm... does this mean the high pressure pump needs to have a closer look???

---

Just tested on mine that actually (surprisingly) pressure produced by fuel lift pump can be seen at fuel high pressure sensor (in fuel rail).

Lift pump can be kept on by VCDS > Engine > Basic Settings > Test of Transfer Fuel Pump. Eventually the pressure "leaks" through high pressure pump and is (barely) detected by fuel pressure sensor.

Below the green is lift pump activation. Light blue sensor raw data (barely at low end resolution/sensitivity). Dark/thick blue calculated sliding average of sensor data.



If you want to try the same I can prepare a how-to?

---

EDIT:

[T6_measured] 01-Engine - Built-in test for Transfer fuel pump

A quick DIY way to test fuel lift pump's basic functionality. The test takes advantage of engine's fuel high pressure sensor (in fuel rail). Running the lift pump continuosly makes the pressure eventually "leak" through high pressure pump and can be detected by fuel pressure sensor. As a side...

www.t6forum.com

 

[n10n]

That's good... hmmm... does this mean the high pressure pump needs to have a closer look???

---

Just tested on mine that actually (surprisingly) pressure produced by fuel lift pump can be seen at fuel high pressure sensor (in fuel rail).

Lift pump can be kept on by VCDS > Engine > Basic Settings > Test of Transfer Fuel Pump. Eventually the pressure "leaks" through high pressure pump and is (barely) detected by fuel pressure sensor.

Below the green is lift pump activation. Light blue sensor raw data (barely at low end resolution/sensitivity). Dark/thick blue calculated sliding average os sensor data.

View attachment 202508

If you want to try the same I can prepare a how-to?

I’m mindblown, this is really good stuff!

 

[rudeboyraz]

I will need to get hols of VCDS as the last time I paid someone to come over and run it for me. I will try to get hold of a lead and software. Am right in thinking the hpfp runs off the timing belt.

P.s really appreciate the help mate.

 

[mmi]

Am right in thinking the hpfp runs off the timing belt.

Correct. However, it's not picky with timing.

I will need to get hols of VCDS

I'm confident that you wouldn't regret even owning a one - just make sure to get genuine HEX-V2 (or HEX-NET) - the older ones do not work very well with
T6 or newer.

 

[rudeboyraz]

Anybody know how I'd go about hiring one or anyone in and around Birmingham want help me out?

 

[Bigsidavies]

Have a look on the vcds map for someone near you. I thought you were in Macc so was going to volunteer.

 

[Phil_j89]

For what it takes, time wise.. I'd be taking the valve off the front of the pump (that the union is screwed onto, that goes to the fuel rail) and checking the spring isn't snapped, or that the lobe inside the pump isn't damaged / scored. You will have to a roller / follower once the valve is removed to see the lobe.

We've had a good number of running faults / no pre warning cut outs, that have been caused by HPFP failure.

 

[rudeboyraz]

Here is where we are at for some reason we can not clear the fault code

P056200 System Voltage Low Voltage
all the feeds to the ECU are showing 13.8 even with a direct feed the error code is still showing. Relays have been check and bypassed still no luck.
Couuld this be the reason why it's not starting, that the ECU is not getting enough power or thinks its not getting enough voltage even though it is.

 

[rudeboyraz]

It's weird because these are the values that are being read