'HDi's for Dummies' diagrams?

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old'uns
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Re: 'HDi's for Dummies' diagrams?

Post by old'uns »

so the next installment....
out this morning, stripped off the gubbins again and found an open ended fitting on the vac reservoir
Image
pipe connected to it and tee'd in to the pipe from the vac pump and to the solenoid on AC, seemed the most logical way the way the plastic pipes sat?

out for test, still the same , flat as....no boost
this was on the faults log from drive
Image

actuator tests...
fuel flow reg...OK
fuel press reg...OK
EGR valve ...clicks
EGR electrovalve...not at first but faintly when pipes to Vac res were swapped, low vac pressure?
inlet air heater throttle electro...OK
Turbo pressure...not at first, again better when vac res pipes swapped

live data screenshots, stationary...excuse the quality, phone got a bit grubby
Image
Image
Image
Image

off out to lunch later and then a sit down in a dark room and a sob in the corner :)

i'm reluctant to take off EGR at moment, no time and may not achieve anything
currently '06 C5 2.0 HDi auto estate Tip run and France trekker - well should be!! occupied currently by '10 Superb DSG 170 elegance- whistles and bells that work
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Re: 'HDi's for Dummies' diagrams?

Post by GiveMeABreak »

Here's the data on those codes:

Engine ECU SIEMENS SID803

P0102
Fault CodeP0102
After Sales Description of the Fault CodeFlowmeter Signal: Measured Flow Less Than the Minimum Flow
Description of the DiagnosticsThe Signal issued From the Sensor is Outside the Electrical Tolerance (Frequency too High)
Conditions of Activation of the DiagnosticsBattery Voltage More Than 7,45 V
Conditions of Disappearance of the FaultIgnition On
Down-Grade Modes If Fault PresentThe Engine ECU No Longer Regulates the EGR Valve
Switching On of the Warning Lamp and /or Warning MessageWarning Lamp MIL
Main Customer Complaints LikelyLack of Power
Suspect AreasAir Flow Meter
Electrical Harness

P2562
Fault CodeP2562
After Sales Description of the Fault CodeTurbo Position Copy Signal Fault: Positive Gap Between the Reference Turbo Position And the Position Measured
Description of the Diagnosticsthe Fault is Forwarded If the Difference Between the Reference Value is Above 30% at the Actual Position (For at Least 8 Seconds)
Conditions of Activation of the DiagnosticsEngine Speed Above 1500 RPM
Engine Torque Higher Than 120Nm
Conditions of Disappearance of the FaultDriving For 5 Minutes
Down-Grade Modes If Fault PresentInhibition of the Flowmeter Plausibility Faults
Torque Limitation For Traction Control
Deactivation of Forced Regeneration of the Particle Filter By the Diagnostic Tool
Switching On of the Warning Lamp And/Or Warning Message
Main Customer Complaints LikelyLack of Power
Noise
Smoke From the Exhaust
Suspect AreasTurbocharger Position Copy Sensor
Electrical Harness
Connector
Vacuum Problem
The Variable Geometry of the Turbocharger is Locked
Particle Filter
Air Metering Valve

P0299
Fault CodeP0299
After Sales Description of the Fault CodeTurbocharger Pressure Signal: Pressure Too Low In Relation To the Reference Value
Description of the DiagnosticsDifference Negative For 10 Seconds, Between the Turbo Pressure Reference and the Measured Turbo Pressure: the Turbocharger Pressure is Below 800 Mbars at the Reference Point, For An External Temperature of 20 °C And at An Altitude of 0 M
Conditions of Activation of the DiagnosticsEngine Speed Above 1000 RPM
The Actual Engine Torque is Higher Than 70 Nm
Conditions of Disappearance of the FaultDriving For 5 Minutes
Down-Grade Modes If Fault PresentDowngrade ASR Mode (Torque Limitation For Traction Control)
Deactivation of the ASR (Wheel Anti-Skid )
Deactivation Speed Limiter Until the Next Time the Ignition is Switched On
Deactivation of the Speed Limiter
Deactivation of the Cruise Control
Deactivation Cruise Control Until the Next Time the Ignition is Switched On
Closing of the EGR (Exhaust Gas Recycling) Valve
Switching On of the Warning Lamp and / or Warning Message
Main Customer Complaints LikelyLack of Power
Noise
Smoke From the Exhaust
Suspect AreasAir Meter Restricted
Clogged Air Filter
Obstacle Obstructing the Air Passage
Air Lock Between Compressor And Engine
Turbocharging Pressure Sensor
Turbocharger Position Copy Sensor
Vacuum Problem
Turbocharger
Please Don't PM Me For Technical Help

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Re: 'HDi's for Dummies' diagrams?

Post by EDC5 »

I think your car would benefit from an overhaul of the vacuum actuation system.

I'm sure getting hold of thin bore rigid pipe wouldn't be too hard and then you could replace all of the questionable tube.
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Re: 'HDi's for Dummies' diagrams?

Post by old'uns »

thanks all so far....

so could still be anything at moment although most likely EGR / Turbo press sensor or vacuum
any easy checks to check for vac pressure/pump?
EGR needs cleaning that's probably a given but not able to do immediately.
P0299 code doesn't affect the Cruise, that still works surprisingly, the X7 before was very fickle on that
would benefit from a new temp sensor in inlet/doser maybe?
turbo copy position / pressure sensor as well

i'm slowly getting to the tipping point of money vs common sense
currently '06 C5 2.0 HDi auto estate Tip run and France trekker - well should be!! occupied currently by '10 Superb DSG 170 elegance- whistles and bells that work
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Re: 'HDi's for Dummies' diagrams?

Post by EDC5 »

I think the pressure sensor in your inlet manifold would benefit from being changed myself. It's probably full of that carbon gunk, possibly clogging the diaphragm.

Also, you may need a new MAF (that includes a temp sensor) as the inlet temp of -49 wont be helping things.

The main issue seems to be the vacuum system that actuates the turbo, if there are no vac leaks then I'd suspect the solenoid valve.
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Re: 'HDi's for Dummies' diagrams?

Post by old'uns »

the temp sensor i cleaned with cleaner as per a MAF
the MAF is new, i may try the old one again just in case
the pressure sensor i'm assuming is the one that is a small short stub with a hole in it next to the Temp one?
i've tried to eyeball the vac pipes as much as possible, nothing obvious stands out
currently '06 C5 2.0 HDi auto estate Tip run and France trekker - well should be!! occupied currently by '10 Superb DSG 170 elegance- whistles and bells that work
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Re: 'HDi's for Dummies' diagrams?

Post by EDC5 »

That's odd, there must be another reason for the erroneous freezing cold temp reading then.

Yes, that's the one, its short stub sticks into the doser housing so it can sense the pressure. Is it blocked up perhaps?

If the piping is all ok, then there may be a physical reason why the vanes on the turbo won't move. I'd be tempted to try this 'easier' step first:

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Re: 'HDi's for Dummies' diagrams?

Post by old'uns »

the reality is at the moment it was bought as a cheap runaround :roll:

so as it stands it has little value to anyone else and i dont particularly want to PX and spend an half decent amount out, so in for a penny....

MAP sensor and Intake temperature sensor ordered for collection Tuesday, ECP £48 with their currrent discount, eBay etc was at least £55+ and no guarantee of delivery dates, at least on Tue evening i can simply unplug / unscrew and try.
i'll look at that video later, if time on Tue i'll try that as well.

IF i get to Turbo replacement territory i may regret the 2nd sentence :(
currently '06 C5 2.0 HDi auto estate Tip run and France trekker - well should be!! occupied currently by '10 Superb DSG 170 elegance- whistles and bells that work
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Re: 'HDi's for Dummies' diagrams?

Post by MikeT »

I don't think there's anything wrong with the MAF.
Cleaning the doser press sensors is worth doing.
Check the turbo is getting proper vacuum (if you haven't done so). If you can reach the turbo actuator rod, push it in and release, it should return under firm spring pressure. Have someone start the engine and you should see it get pulled into the diaphragm by about 12mm.
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Re: 'HDi's for Dummies' diagrams?

Post by Simple76 »

If you rev the vehicle when stationary does the rubber turbo pipe from inter cooler expand . If so turbo working . Simple test to try. I would be taking EGR valve off and checking. Egr valve will cause many of the faults listed. They are not as difficult to change as appears.
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Re: 'HDi's for Dummies' diagrams?

Post by old'uns »

x fingers i can get something done tomorrow evening, plenty to go at thanks all.
strangely enough today and tomorrow, working at a well known engine specialists in Northampton, some blokes called Costin and Duckworth started it 60 yrs ago although i fear even they may not be able to help me, too low tech i think :-D
currently '06 C5 2.0 HDi auto estate Tip run and France trekker - well should be!! occupied currently by '10 Superb DSG 170 elegance- whistles and bells that work
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Re: 'HDi's for Dummies' diagrams?

Post by MikeT »

You can test the whole vacuum system with a low-tech vacuum kit.
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Re: 'HDi's for Dummies' diagrams?

Post by Paul-R »

old'uns wrote: 17 Sep 2018, 21:31 ... some blokes called Costin and Duckworth started it 60 yrs ago although ...
Sadly no longer with us unless you can communicate by Ouija board.

A couple of great engineers. Thanks for the reminder.
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old'uns
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Re: 'HDi's for Dummies' diagrams?

Post by old'uns »

Mike Costin is still about, sure someone mentioned he was 89?, apparently going in on Thursday for a look around and to sign the frosted door panels that bear his name
currently '06 C5 2.0 HDi auto estate Tip run and France trekker - well should be!! occupied currently by '10 Superb DSG 170 elegance- whistles and bells that work
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Re: 'HDi's for Dummies' diagrams?

Post by Paul-R »

Quite right. My addled brain was thinking of his brother Frank Costin (the cos in Marcos). Apologies.
As I get older I think a lot about the hereafter - I go into a room and then wonder what I'm here after.

Inside every old person is a young person wondering what the hell happened.

"Trying is the first step towards failure" ~ Homer J Simpson​
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