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Disco 4 3.0 2016 induction woes
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Schooner0
 


Member Since: 02 Nov 2020
Location: Somerset
Posts: 5

United Kingdom 
Disco 4 3.0 2016 induction woes


Hi, so anyone want to join me in a journey?

3.0 Gen 2 goes in to limo with the following codes....

P004D Turbocharger / Supercharger Boost Control (Solenoid B) Circuit High
P004B - 77 Turbocharger / Supercharger Boost Control (Solenoid B) Command position not reached
P00BF-07 Mass or Volume Air Flow B Circuit Range/Performance - Air Flow Too High

Checked the inlet valve, later type with a new actuator in it, checked the shut off valve, all the boost vacum pipes are ok, smoked tested inlet and found no leaks, swapped control solenoids and map sensors.

The only thing is the map sensor connected to the secondary turbo reads 0, swapped it still reads 0, check the supply and grounds, 5.02v and 0.15 (but it’s trough ecu) so ok and the Vout is continuous from sensor to ecu, although it appears to take its Vcc from the same line as the left/primary turbos actuator. Back probed with ign on I can make the Vcc fluctuate with a bit of positive/negative pressure, just reads 0.00Kpa engine off or at idle.

When I compare this to another both map sensors read 0.99Kpa, so.....

Before I play pick a turbo any turbo, anyone want to wade in?
 

Last edited by Schooner0 on 2nd Nov 2020 7:58 pm. Edited 1 time in total 
Post #21841782nd Nov 2020 7:33 pm
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NJSS
 


Member Since: 06 May 2009
Location: Catherington, Hampshire.
Posts: 10464

United Kingdom 2016 Discovery 4 3.0 SDV6 Landmark LE Auto Waitomo GreyDiscovery 4

Welcome Schooner0 - please complete your profile.

Quote:
Disco 4 3.0 2019 induction woes



A 2019 Discovery 4 Question Exclamation

I thought mine, built in 2016 was part of the final production run.

What please is the VIN ?

NJSS
 Am I Gammon or Woke ? - I neither know nor care.

2016 Discovery 4 Landmark
2011 Mercedes Benz SL350 (R230)
1973 MG B GT V8 - 3.9L John Eales engine, 5 speed R380 gearbox, since 1975.
1959 MGA roadster - 1.9L Peter Burgess Engine - 5 speed gearbox
Past LRs - Multiple FFRs, Discos & a Series I - some petrol, some diesel,
none Electric or H2 fuel cell - yet.
There are 10 types of people in this world: Those who understand binary, and those who don’t. 
 
Post #21841802nd Nov 2020 7:42 pm
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Disco_Mikey
 


Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20713

Scotland 2005 Discovery 3 TDV6 HSE Auto Cairns BlueDiscovery 3

GA chassis number, its a 2016 Thumbs Up
 My D3 Build Thread

TDV8 Retrofit Build Thread 
 
Post #21841822nd Nov 2020 7:50 pm
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gstuart
 


Member Since: 21 Oct 2016
Location: kent
Posts: 13576

United Kingdom 2005 Discovery 3 TDV6 Base 7 Seat Auto Java BlackDiscovery 3

It’s part of the special tardis range Laughing
   
Post #21841832nd Nov 2020 7:50 pm
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Schooner0
 


Member Since: 02 Nov 2020
Location: Somerset
Posts: 5

United Kingdom 

NJSS wrote:
Welcome Schooner0 - please complete your profile.

Quote:
Disco 4 3.0 2019 induction woes



A 2019 Discovery 4 Question Exclamation

I thought mine, built in 2016 was part of the final production run.

What please is the VIN ?

NJSS



Apologies, long day 2016......🤪
  
Post #21841892nd Nov 2020 7:58 pm
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Schooner0
 


Member Since: 02 Nov 2020
Location: Somerset
Posts: 5

United Kingdom 

gstuart wrote:
It’s part of the special tardis range Laughing


Rolling with laughter It’s the right colour blue!
  
Post #21841902nd Nov 2020 8:00 pm
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gstuart
 


Member Since: 21 Oct 2016
Location: kent
Posts: 13576

United Kingdom 2005 Discovery 3 TDV6 Base 7 Seat Auto Java BlackDiscovery 3

Rolling with laughter , couldn’t resist

Fingers crossed will be a simple, fix Thumbs Up
   
Post #21841912nd Nov 2020 8:03 pm
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NJSS
 


Member Since: 06 May 2009
Location: Catherington, Hampshire.
Posts: 10464

United Kingdom 2016 Discovery 4 3.0 SDV6 Landmark LE Auto Waitomo GreyDiscovery 4

...Long Day... understood.

I've had no hot water or heating for 18 out of the last 24 hours Big Cry It's surprising hot cold it gets!

All fixed now, a corroded pipe & bu***ered O rings in the boiler caused leaks.

NJSS
 Am I Gammon or Woke ? - I neither know nor care.

2016 Discovery 4 Landmark
2011 Mercedes Benz SL350 (R230)
1973 MG B GT V8 - 3.9L John Eales engine, 5 speed R380 gearbox, since 1975.
1959 MGA roadster - 1.9L Peter Burgess Engine - 5 speed gearbox
Past LRs - Multiple FFRs, Discos & a Series I - some petrol, some diesel,
none Electric or H2 fuel cell - yet.
There are 10 types of people in this world: Those who understand binary, and those who don’t. 
 
Post #21841932nd Nov 2020 8:21 pm
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OvalAutos
 


Member Since: 28 Dec 2018
Location: Cradley Heath
Posts: 382

United Kingdom 

Fine looking diagnostic tool you have there. Maybe give them a call with the codes.

Failing that, you could look at getting one of these to test the electronic actuator in situ.

 Joe  
Post #21842183rd Nov 2020 7:30 am
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Schooner0
 


Member Since: 02 Nov 2020
Location: Somerset
Posts: 5

United Kingdom 

So... that is a lovely actuator test tool, side note I wonder where I could have a demo of one...

However the pain continues... even with a shiny new primary turbo!

Wiring to the secondary map good, 5v supply, 1.40 +\- signal back to ecu still not reading ign on eng off or driving, as it’s a Gen 2.0 it’s a different wiring to the Gen 1, mainly from what I can see the power comes of the primary turbo, but ground and signal go to ecu, so the data still is as pics...

Working donor (for values)...



Our broken one...



Just looking for confirmation of these values on a 3.0 Gen 2 anyone else with ignition on and engine off have a zero reading, instead of what I think should be there ie .98 or atmospheric?
  
Post #219408315th Dec 2020 5:26 pm
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Schooner0
 


Member Since: 02 Nov 2020
Location: Somerset
Posts: 5

United Kingdom 

Just to say thanks to anyone who reads this post and to those who contributed.

Vehicle now fixed, engine loom was at fault for primary turbo and a blocked dpf.
  
Post #221349124th Feb 2021 6:33 pm
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johnhorgan
 


Member Since: 23 Sep 2019
Location: Richmond
Posts: 117

New Zealand 2006 Discovery 3 TDV6 Base 7 Seat Auto Siberian SilverDiscovery 3

Which wires were at fault ? Have you got any pictures ?
  
Post #231999425th Dec 2022 12:57 am
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