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Discussion Starter #1
Afternoon folks.

I've just put the engine back into my '97 Carvavelle post clutch and dmf change to resolve a leaking slave cylinder.

It refuses to fire!

I've research a lot of threads on here - most associate the problem with the glow plug light not coming on and a broken earth return from the ecu across the top of the engine & the infamous 109 relay starting problems (my black and white) wire has been spliced already lol!)

I've fairly much ruled that out - my glow plug lights up & and goes out again, but does flash after a minute or two with ign on - indicating a fauklt I understand.

I assume I've a broken wire in a loom somewhere or plug not quite home! pushed and pulled & disturbed a fair bit / most of the wiring :-(

VCDS lite wouldn't connect - but that was the same prior to the job. Generic Autel fault reader didn't show any issues.

I've got a proper ross tech cable and VCDS works fine???

Throws up the following faults - I know some of them are caused by cranking over, so more interested in thoughts about the N146 & the data wiring for the immobiliser?? Any advise or previous experience appreciated. I didn't touch the timing etc, both belts are intact - that's my next job - didn't want todo too much without a working vcds - which I now have.

VCDS Version: Release 15.7.4 Running on Windows 10 x64
Data version: 20160216
www.Ross-Tech.com

Friday,20,May,2016,13:44:06:53138

Chassis Type: 7D - VW Transporter/Multivan (1996 > 2004)
Scan: 01 02 03 08 15 17 18 19 22 25 35 37 56

-------------------------------------------------------------------------------
Address 01: Engine Labels: 074-906-021-ACV.lbl
Part No: 074 906 021 L
Component: 2,5l R5 EDC 00SG 1450
Coding: 00002


4 Faults Found:
01268 - Quantity Adjuster (N146)
35-00 - -
01268 - Quantity Adjuster (N146)
27-00 - Implausible Signal
00765 - Modulating Piston Movement Sensor (G149)
35-00 - -
01269 - Commencement of Injection Valve (N108)
31-10 - Open or Short to Ground - Intermittent
Readiness: N/A

-------------------------------------------------------------------------------
Address 25: Immobilizer Labels: 1H0-953-257.lbl
Part No: 1H0 953 257 B
Component: IMMO VWZ3Z0V5222191 V00


1 Fault Found:
00546 - Data wiring faulty
27-00 - Implausible Signal

Thanks in advance!!!!
 

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243 Posts
Air in system vacumm bleed return from pump and crank with good battery, all tdi,s report those faults after extended crank and no start.
 

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Premium Member
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48 Posts
Discussion Starter #3
Presume this will be in the fuel pump wiring loom / or a connector somewhere - anybody know the physical location so I can have a look?

ELSAWIN shows this in the wiring diagrams!

Oops won't let me add the file.
 

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90 Posts
Hi. Having the same problem with my 2.5 ACV engine after a diesel pump swap. All bled right up to the injectors. Tow started it and
i can get it to run above 2000 rpm but if it goes bellow it dies.
 

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Premium Member
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48 Posts
Discussion Starter #7
Update - It's running....

Bled the pump and filter / pipework as suggested no luck - fried the starter motor with excessive cranking I guess :-(

Trip to the local autosparks with the burnt up brush set and got a new one, 1/2 an hour later starter rebuilt and installed again!

Traced the wire / N146 sensor fault as unearthed by vcds with a bit of help from elswin wiring diagrams and text re diagnosis and found some broken wires on the big multiplug at the bottom front of the engine - a temp repair and it started within a second or two.

Wires are a bit brittle on one side of the plug so guess I'll source another bit of loom and splice it in nice.

:D
 
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