Help please Flashing coil light and EML on. Multiple codes 31391 27202 8208 8216 8217 8338

[Westcoast888]

That's what I believe - sensor reference voltage A = D39.
Anyways, it's 5.00 Volts between D39 and earth. Thus also the same 5.00 Volts for each of the sensors along the D39


Should be 5.00 Volts

---

Based on the compiled list of sensors along D39 it seems we missed quite a few misreadings in the blockmap data


G40 was not reporting RPM at all in the blockmap (post 10)


Interestingly G247 was reporting a plausible value, however the raw voltage is not correct - should have been around 1 Volt for 382 bar. The 382 bar could be just ECU providing an estimate based on engine RPM.

View attachment 260565


Should have been at about 1000 mbar, voltage about 1 Volt

View attachment 260564


Was reporting plain zero engine running.

Thanks for your thoughts mmi, I’m going to delve a bit deeper in a couple of hours and hopefully get to the bottom of it!

 

[Westcoast888]

So I have tracked down what I think is the D39 joint. In the Ebox under the battery about 150mm from the ECU plug T60. It looks like this is where the cables split to all the different sensors. Now just to isolate the problem. I think I deserve a cuppa first thoSo this is how cables are joined these days! Is this called progress? If I found this in a house I’d call it a bodge!

 

[Westcoast888]

Ok so suitable refreshed with a pot noodle and a brew

I’ve cut the join


Then separated the cables and then tested the voltage coming from the ECU and we have 5v. I think this means the ECU is good. Further testing with the meter set to ohms revealed one of the cables has low resistance to the vans ground. I’m hoping this is the fault. So I guess it’s just a process of elimination now…

 

[Westcoast888]

The cable with the ‘fault’ is yellow and white so we can eliminate the following sensors with different colours

G235
G247
G447
G505

So next idea is to test continuity between the known faulty cable at the D39 connection point and the corresponding pin on each sensor with the white/yellow cable

Eliminated
G31 - easy to get to!

All the others are a little tricky so will report back once I’ve got my hands dirty

 

[Westcoast888]

Ok so I thought it might be easier to just connect the good wires together and then rescan to see what sensor(s) are missing. After clearing the faults I’m left with some new ones but the ABS faults seem to have cleared.

I’ll post the block data and the log and in the meantime I’ll try to decipher its contents but it does feel as we’re getting closer?

 

[Westcoast888]

Here are the new faults

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Address 01: Engine Labels: 04L-907-309-V2.clb
Control Module Part Number: 04L 906 056 LA HW: 04L 907 445 A
Component and/or Version: R4 2.0l BTD H03 3773
Software Coding: 00194014432401080000
Work Shop Code: WSC 02762 790 50316
ASAM Dataset: EV_ECM20BTD03004L906056LA 004004 (VN75)
ROD: EV_ECM20BTD03004L906056KS_004.rod
VCID: 77AC32629F49B2126E9-8022
2 Faults Found:

30542 - Throttle Position Sensor (G69)
P0122 00 [10100011] - Signal too Low
MIL ON - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Priority: 2
Fault Frequency: 1
Mileage: 61597 km
Date: 2075.01.08
Time: 00:06:38

Engine RPM: 0.00 /min
Normed load value: 0.0 %
Vehicle speed: 0 km/h
Coolant temperature: 13 °C
Intake air temperature: 17 °C
Ambient air pressure: 970 mbar
Voltage terminal 30: 12.437 V
Unlearning counter according OBD: 40
Mass airflow sensor 1 bank 1 airflow: raw value: 0.0 mg/stroke
Throttl.valve adapt. 1 bank 1: posit feedback - Specified value: 125.00 %
Throttl.valve adapt. 1 bank 1: posit feedback - Actual value: 100.00 %
Throttl.valve adapt. 1 bank 1: posit feedback - Offset closed: 0.27 %
Throttl.valve adapt. 1 bank 1: posit feedback - Raw voltage: 0.000 V

30546 - Turbocharger Boost Control Position Sensor Circuit
P2564 00 [10100011] - Signal too Low
MIL ON - Not Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Priority: 2
Fault Frequency: 1
Mileage: 61597 km
Date: 2075.01.08
Time: 00:06:38

Engine RPM: 0.00 /min
Normed load value: 0.0 %
Vehicle speed: 0 km/h
Coolant temperature: 13 °C
Intake air temperature: 17 °C
Ambient air pressure: 970 mbar
Voltage terminal 30: 12.437 V
Unlearning counter according OBD: 40
Turbine actuator 1 bank 1: posit.feedback - Specified value: 0.00 %
Turbine actuator 1 bank 1: posit.feedback - Actual value: 120.17 %
Turbine actuator 1 bank 1: posit.feedback - Offset closed: 0.11 %
Turbine actuator 1 bank 1: posit.feedback - Raw voltage: 0.000 V
Accelerator pedal travel: raw value: 0.00 %

So just to identify which sensors are missing the reference voltage cable from pin 51 (D39)

 

[Westcoast888]

So further progress

The ‘faulty’ cable is pretty much shorted to ground when using an ohmmeter. I have removed the charge cooler and checked continuity to G40 & GX3 and confirmed they are good and not connected to the faulty cable. This just leaves G581. I can’t seem to find it on the van. Any ideas please?

 

[mmi]

4 - Pressure canister
❑ With position sender for charge pressure positioner - G581-

 

[Westcoast888]

G581 is right behind the engine on top of the turbos

 

[Westcoast888]

4 - Pressure canister
❑ With position sender for charge pressure positioner - G581-


View attachment 260647

Just found it thanks buddy

 

[Westcoast888]

So with the G581 sensor connected I’m getting the faulty cable down to ground. With it disconnected the short has gone. Is this normal or is the sensor toast?

 

[mmi]

Sounds like it's the sensor? You get +5.00 Volts in the disconnected plug?

 

[Westcoast888]

Sounds like it's the sensor? You get +5.00 Volts in the disconnected plug?

It’s still disconnected but I’d imagine I would if I reconnected it as I’m not getting a short to ground when the sensor is unplugged. Does this mean we have found the problem? Fingers crossed! so any idea what the part number would be and the process involved in replacement. It looks pretty tricky!

 

[mmi]

Source: IFInterface
145-067

 

[mmi]

I’ll post the block data and the log and in the meantime I’ll try to decipher its contents but it does feel as we’re getting closer?

Yes, all the earlier mentioned data items are back to normal + quite a few others, e.g.

 

[Westcoast888]

Struggling to find an actuator with this part number “03n 198 716n” online. Is it a dealer only part? Doesn’t look too bad to swap if you have the hands of a 3yr old!

 

[mmi]

Hmmm... possibly it's a VW part but I do get a lot of hits by "03N198716N"

03N198716N at DuckDuckGo

DuckDuckGo. Privacy, Simplified.

duckduckgo.com

 

[Westcoast888]

Hmmm... possibly it's a VW part but I do get a lot of hits by "03N198716N"

03N198716N at DuckDuckGo

DuckDuckGo. Privacy, Simplified.

duckduckgo.com

I did try that and I can see one on eBay but it’s in Latvia and could be a month in the postie’s van. I’ll keep looking. Really excited at the prospect of driving my van again it’s been off the road since February

 

[Westcoast888]

Replacement actuator ordered direct with Sinclair VW just shy of £280 with starmers cut. Will be able to collect tomorrow which gives me enough time to practice dislocating my fingers in readiness for the swap!

Has anyone replaced one before? Any advice greatly appreciated!

 

[Westcoast888]

New part collected this afternoon. Now the fun starts!