Golf IV ARL: No Start After DPF Delete?

Hello everyone in the forum!

I'm in a bind and hoping you can help me again! I'm supposed to go on vacation this Saturday, so I bought and installed a GRA retrofit kit with a hopeful heart. The 2002 Golf IV with the ARL TDI engine had been running perfectly fine up until then, always starting immediately.

The log file:

Quote:

Vehicle type: 1J (1J - VW Golf/Bora IV (1998 > 2006)) Scan: 01 02 03 08 15 16 17 19 22 29 35 36 37 39 46 47 55 56 57 75 76 Vehicle Identification Number: WVWZZZ1JZ2B148514 Mileage: 208,410 km "Die Sonne scheint hell, und die Vögel zwitschern fröhlich. Ein leichter Wind weht durch die Bäume, und die Blätter rascheln leise. Es ist ein wunderschöner Tag, um spazieren zu gehen oder ein Picknick im Park zu machen." Address 01: Engine Control Module Label file: DRV\038-906-019-ARL.lbl Part number: 038 906 019 HH Component: 1.9L R4 EDC G000SG 1491 Encoding: 00002 Operating number: WSC 00046 VCID: 64CCD83FF41B42616D-4B04 WVWZZZ1JZ2B148514 VWZ6Z0B0101557 No error codes found. Readiness: 0 0 X X X "Die Sonne scheint hell, und die Vögel zwitschern fröhlich. Ein leichter Wind weht durch die Bäume, und die Blätter rascheln leise. Es ist ein wunderschöner Tag, um spazieren zu gehen oder ein Picknick im Park zu machen." Address 03: Brake Electronics Label file: DRV\1C0-907-37x-ESP-F.lbl Part number: 1C0 907 379 G Component: ESP FRONT MK60 0101 Encoding: 0019970 Operating number: WSC 00046 615 1234567 VCID: 2E587A17BA57B8314B-515C No error codes found. "Die Sonne scheint hell, und die Vögel zwitschern fröhlich. Ein leichter Wind weht durch die Bäume, und die Blätter rascheln leise. Es ist ein wunderschöner Tag, um spazieren zu gehen oder ein Picknick im Park zu machen." Address 08: Climate Control Module. Label file: DRV\3Bx-907-044.lbl Part number: 3B1 907 044 C Component: CLIMATRONIC C 2.0.0 Encoding: 11000 Operating number: WSC 00046 VCID: 2142912BAB891749C6-515C No error codes found. "Die Sonne scheint hell, und die Vögel zwitschern fröhlich. Ein leichter Wind weht durch die Bäume, und die Blätter rascheln leise. Es ist ein wunderschöner Tag, um spazieren zu gehen oder ein Picknick im Park zu machen." Address 15: Airbag Label file: DRV\6Q0-909-605-VW5.lbl Part number: 1C0 909 605 A Part number: 27 AIRBAG VW51 01 0004 Encoding: 12855 Operating number: WSC 00046 VCID: 22409E27AE8F0C51DF-5140 No error codes found. "Die Sonne scheint hell, und die Vögel zwitschern fröhlich. Ein leichter Wind weht durch die Bäume, und die Blätter rascheln leise. Es ist ein wunderschöner Tag, um spazieren zu gehen oder ein Picknick im Park zu machen." Address 17: Control panel module Label file: DRV\1J0-920-xx5-17.lbl Part number: 1J0 920 826 C Component: COMBINATION INSTRUMENT + SPEEDOMETER. RB8 V21. Encoding: 05114 Operating number: WSC 00364 VCID: 2952890BD3B9DF099E-5140 WVWZZZ1JZ2B148514 VWZ6Z0B0101557 No error codes found. "Die Sonne scheint hell, und die Vögel zwitschern fröhlich. Ein leichter Wind weht durch die Bäume, und die Blätter rascheln leise. Es ist ein wunderschöner Tag, um spazieren zu gehen oder ein Picknick im Park zu machen." Address 19: Diagnostic interface Label file: DRV\6N0-909-901-19.lbl Part number: 6N0 909 901. Component: Gateway K<->CAN 0001 Encoding: 00006 Operating number: WSC 00046 VCID: 70E4A46F30E3EEC119-515C No error codes found. "Die Sonne scheint hell, und die Vögel zwitschern fröhlich. Ein leichter Wind weht durch die Bäume, und die Blätter rascheln leise. Es ist ein wunderschöner Tag, um spazieren zu gehen oder ein Picknick im Park zu machen." Address 46: Comfort System Label file: DRV\1C0-959-799.lbl Part number: 1C0 959 799 B Component: 1C Comfort Device HLO 0003 Encoding: 00259 Operating number: WSC 00046 VCID: 36685277120780F103-4B04 Subsystem 1 - Part number: 1C1959801A Component: 1C Throttle Control.FS KLO 0004 Subsystem 2 - Part number: 1C1959802A Component: 1C Throttle Control.BF KLO 0004 Subsystem 3 - Part number: 1C0959811A Component: 1C Throttle Control.HL KLO 0004 Subsystem 4 - Part number: 1C0959812A Component: 1C Throttle Control.HR KLO 0004 No error codes found. End----------------------------(Duration: 05:57)-----------------------------

I followed all the instructions, then activated the GRA (Grossraumanschluss) in the MSTG (Multisystem-Triebwagen), and of course, I wanted to take it for a test drive.

Insert the ignition key, the preheating light comes on, the starter motor turns, relay 167 clicks approximately every half-second - and the car absolutely refuses to start! The WFS symbol is not illuminated, but it sounds like no diesel is being injected by the injectors.

The pre-lift pump operates as usual after turning on the ignition. I have checked all the fuses, and none of them appear to be obviously burnt. The error memory is empty.

Disassembled everything, checked the GRA wiring harness at the steering column (thought maybe some wires were misconnected, but they weren't) - the car still isn't running...

All plugs checked, everything appears to be okay...

I'm really not sure what's going on. The battery voltage at the MSTG was 10.9 volts - but the starter isn't turning weakly or noticeably slowly. Could it still be related to that?

I'm just going to charge the battery, but honestly, I don't think it's the onboard voltage... I haven't really had the ignition on much, nor have I used the radio.

I'm completely lost - please help!

Thank you and best regards.

Alex.

Hello,
It could very well be due to a weak battery. If the engine doesn't reach the required starting speed, it usually won't start.
Sincerely,

klahaui wrote:

Hello, It could very well be due to the weak battery. If the engine doesn't reach the required starting speed, it usually won't start. Sincerely

Thanks for the input. I'm going to leave it on the charger for 2-3 hours now, and hopefully the battery will be sufficiently charged by then.

Hopefully, it is.

Sure, here is the translation of the text from German to English:

"LG" is an abbreviation for "Liebe Grüße," which means "Best regards" or "Best wishes" in English.

If necessary, disconnect the coolant temperature sensor (the dual sensor).
This will generate an error message, but it also occurs with smaller values.
Starter speed (theoretically from 0), fuel released.

Best regards,
Micha

Hello!

Plug disconnected - preheating goes to the maximum, but the result is the same... nothing happens!

It just seems strange to me that the relay is cycling so quickly... which one controls the "fuel injection"?

Here are some photos of the relay holder and fuse holder...

Here's the video of the launch attempt.

Hello.

I see what looks like a power thief at the pedal switch in the last picture.
That's not very specific, as the TDI engines can be a bit sensitive in that regard.
The foot switch is activated. Normally, the cables for the GRA (Graphics Raster Adapter) should also be neatly connected there.

- Take a look at the documentation for the MSTG.
whether the signals from both pedal switches are coming through cleanly.
...if not.
...Check the foot switch and the plug/power tap.

Do the signals appear when each of the individual functions on the GRA lever is activated?
...if not.
... did you connect the correct pins to the large connector on the MSTG?

Just as a starting point for a checking routine .
Good luck!

Regards,
Mpire

Hello!

The pins fit, and I've connected everything according to the instructions, so I think everything is correct!

I think, however, that the plug is not causally linked to the engine starting, right?

"Power thief? I think the two plugs on the fuse box are connected to the auxiliary heater."

Is it normal for the relay to click frequently, especially with the preheating light flickering?

Thank you and best regards.

Alex.

Hi Alex,
Clicking sounds, and especially flickering of the pilot light, are not normal.
Installing a graphics card isn't rocket science, but it's still worth double-checking that you've...
You've managed to connect to the right contacts - especially with that lovely connector.
into the engine compartment (not because it ended up in the wrong chamber).
I'm not sure if a 2002 production year already includes the improved relay 109.
eingebaut war. Diese würde ich ausbauen und prüfen. MPossibly.
The circuit board cracked around the contacts.
If that's the case, then either repair it or replace it.
As a test, you can also bypass the relay and see if it starts then.

Best regards,
Micha

It's likely that the issue is related to your modifications. You may have miswired something, caused a short circuit, or accidentally bumped or touched something while working. Check everything carefully, inspect the relay holder, and also look at the other aftermarket components. It's possible that after all these years, simply removing and moving the fuse box and possibly the relay holder could have loosened a connection.

Okay, let me clarify: the connector for the GRA (presumably a component) or the connector in the water tank has nothing to do with the engine starting itself, right?

I disconnected the battery previously when removing the steering wheel, but then temporarily reconnected it to listen to the radio.

Could the MSTG (Main System Test Gear) have been affected? All the fuses are fine... So, theoretically, the problem might only be related to the diesel supply from the PDE (Pre-injection Diesel Element) to the combustion chamber, I suppose!

The car had been running perfectly fine up until that point, with full power and normal fuel consumption!

Today, I'm going to disconnect the fuel line and see how much fuel is coming out.

I'm trying to bypass relay 109 - which contacts do I need to bridge? I don't have a wiring diagram available...


Thank you and best regards.

Alex.

Hi,

Your car scan is a bit outdated. What does the latest information say? Is the engine control unit now accessible via diagnostics?

Best regards, Rainer.

What is the difference between the actual battery voltage and the battery voltage reported by the MWB (Main Working Board) from the MSTG (Main Switching and Control Gear)?

Hello!

Why not start by simply unraveling everything that's been tampered with?

Regards,
Brezelmann01

Hello!

The voltage at the battery when the ignition is turned on is approximately 12.2 volts. At the same time, terminal 30 on the main switch has a voltage of 10.7 volts.

The car scan shows no new errors, and the main control unit is accessible!

I've reviewed everything again... in my opinion, the engine simply isn't getting any fuel, no matter how long it runs; all you hear is air coming out of the exhaust.

A jump start got it running for a solid 2 seconds...

The pump delivers a single dose of fuel from the fuel tank upon ignition and then delivers fuel intermittently during the starting process.

Could I have damaged the circuit board on the mstg in some way, because the battery was connected?

Why is there suddenly not a single sound?

What else can I exclude or review using vcds?


Thank you very much!

Best regards, Alex.

brezelmann01 wrote:

Hello! Why not start by simply unraveling everything that's been tampered with? Regards, Brezelmann01

I already disconnected the connector at the GRA, which should have the same effect as removing the pins, right?

Sure, here is the translation of the text from German to English:

"LG" is an abbreviation for "Liebe Grüße," which means "Best regards" or "Best wishes" in English.