Won’t start [Resolved]

[Van Buddy]

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 replaced.
Any ideas before the spanners come out ?
Crank sensor ?

 

[Dellmassive]

what year?

scan data will show some direction.

scan for a RMP signal.

look for fuel rail pressure.

look for missing modules - possible blown fuses.


what you using to scan for codes?

 

[Van Buddy]

Thanks for your reply. Scan attached.

2017 model year

 

[Dellmassive]

ok so you have access to vcds.

lets look at the 01 - engine PIDS.

To see if anything is missing.

@mmi may have some input on the VCDS front.

https://www.ross-tech.com/vag-com/m_blocks/001-009.html

measuring block001 -

do you get a RPM reading when turning over?

do you get good voltage?

does the turning over sound right? - too fast/slow?

can you get a video clip (on phone) and post on youtube for us to see/hear?

 

[Van Buddy]

The measuring blocks are greyed out. I have found a screen that shows crank and camshaft signals along with fuel pressure.
Engine turns over at normal speed and sounds normal.
I’m quite new to vcds so will do some studying.

 

[Dellmassive]

have a quick look here re vcds:

VCDS / VagCom - How I Done It -

VCDS / VAGCOM - How I Done It - *********************************************** The current software version is : VCDS FULL Release V19.6 VCDS-Lite Release V1.2 VCDS-Beta V19.6.1 Click HERE for More Details Ross-Tech: VCDS: Downloads: Current Release and Manual...

www.t6forum.com

.

 

[Dellmassive]

 

[Dellmassive]

also what millage?

has it had a cam belt change yet?

are you thinking slipped cam belt?

 

[Dellmassive]

post a few pics of the engine bay. and that EGR pipe etc . . . . so we have something to go by.

 

[Van Buddy]

Timing belt was changed 4K ago, took cover off and all looks ok. Van on 54k now.
egr pipe was weeping water from around the crack, guessing that’s normal from burning hydro carbon. It’s leaking slightly where the pipe fits into the flange. I’ve taken some pictures of vcds before and whilst cranking. No injector value ?? Battery is ok, voltage low as been cranking a lot.

 

[Dellmassive]

fuel filling . . ?

injector start and duration . . . ?

that may be the issue? - no fuel?


......................


but rail pressure shows 40400kpa . . . so has fuel in rail.


.....................

 

[mmi]

Tick the following in VCDS Advanced Measuring Values,

IDE00021 Engine RPM​

IDE00347 Air mass: actual value:​

IDE00351 Main injection: start of activation​

IDE00352 Main injection: duration of activation​

IDE00407 Rail pressure regulation: status​

IDE00416 Starter control: terminal 50 feedback​

IDE00589 Fuel pressure​

IDE03767 Engine status​

IDE07757 Exhaust recirc.valve 1 bank 1: posit.feedback - Actual value​

IDE07771 Throttl.valve adapt. 1 bank 1: posit feedback - Actual value​

IDE07824 Tank-internal presupply pump 1 bank 1: activation​

​

Tick "Group UDS requests" - by 7.
Click Log - Start
Crank the engine - 3 seconds is enough.
Stop logging etc.
The logfile will be in folder ...VCDS\Logs
Please post the logfile.

---

EDIT: a snapshot of a successful engine start

 

[Dellmassive]

injectors are run from J623 Engine ECU . .

T6 - 2.0 Diesel EU6 Engine Wiring Diagram

2L Diesel Engine With Start/Stop Circuit Diagram Covers Euro 6 engines CXEB/CXEC Please check the history/updates tab, first release is for early T6s manufactured from June 2015 with CXEB engine, second release is for vehicles manufactured from...

www.t6forum.com

i think id be looking at checking EVERY FUSE, one at a time. . . . . to see if we have a blow fuse or open relay.

fuses look like they being fed from SA & SB engine bay fuse boxes.

T6 - VW T6 Relay Locations

Relay Chart/Listing For All Relay Locations - In Engine Compartment, Adjacent Fuseholder SA In Dashboard, Integral To Fuseholder SC Under Left/Right Seat, Integral To Fuseholder SH VIP Membership is required to download this document Below is...

www.t6forum.com

 

[Dellmassive]

T6 - Fuse Box layout map Box B

www.t6forum.com

T6 - VW T6 Fusebox - Fusebox/Fuse Chart SB - Engine Fusebox

Fuse Chart/Listing For Fuse Holder SB - Left Side Engine Compartment This fusebox contains the majority of engine circuits VIP Membership is required to download this document Below is a sample image of part of the document

www.t6forum.com

T6 - VW T6 Fusebox - Fusebox/Fuse Chart SA - Primary Battery Fusebox

Fuse Chart/Listing For Fuse Holder SA - Engine Compartment Located in 'E-Box' underneath battery, this fusebox contains the primary heavy duty feeds from the battery to main vehicle equipment VIP Membership is required to download this document...

www.t6forum.com

 

[Loz]

Did i see battery voltage at 9.6 volts?

 

[Dellmassive]

Did i see battery voltage at 9.6 volts?

that was while he was cranking . . .

 

[Van Buddy]

Thanks for your replies, awesome help.
MMI, I have attached the log but I can't open it.

 

[mmi]

Thanks for your replies, awesome help.
MMI, I have attached the log but I can't open it.

Thanks - strange indeed. As already seen on your screenshots - it seems that injectors do not open at all when they should (red in the picture), neither activity on timing (see picture in my post above).
There is airflow, fuel pressure, EGR turned off, throttle open,... but no fault code!

Forum compressed the picture - a better copy in PDF-format attached.

 

[mmi]

Certainly wouldn't hurt to get also full copy of engine's measurement values.

VCDS -> Applications -> Controller Channel Map ->


Tick/fill boxes as above and hit Go.
VCDS flashes screens for a moment (when finished hit "Done, Go Back") and there will be file blockmap-01-... in folder C:\Ross-Tech\VCDS\Logs\....

 

[Van Buddy]

Thanks for your input. I’ll do that tomorrow.