C5 Eolys Question.

[NewcastleFalcon]

Should I really have bought this car

Peter

it is not physically measured. You will need to rest the counter when you top it up using Diagbox.

I find this "you have to tell the car you have topped up the fluid" a bit unbelievable. What next...you need to tell the car you have put more petrol in/topped up the coolant or put air in your tyres.

Did the manufacturers forget on purpose to do a little bit of "programming"/sensor installation to make this as easy as filling up your fuel tank.

REgards Neil

[GiveMeABreak]

If you don’t reset the additive counter, the system will not know you have filled the additive tank (as it is not physically measured) and at sometime soon after the warning, it will go into reduced engine power mode as it will not operate the additive pump and will not regenerate, leading to a blocked particle filter.

To be honest Peter, if you don’t want the faff of crawling under, filling th tank and resetting it, just get the dealer to do it. They’ll probably do it for just over £200, and you won’t have to worry about it again for another 75-80k miles at which time the particle filter will need cleaning or replacing by then.

[GiveMeABreak]

Should I really have bought this car

Peter

it is not physically measured. You will need to rest the counter when you top it up using Diagbox.

I find this "you have to tell the car you have topped up the fluid" a bit unbelievable. What next...you need to tell the car you have put more petrol in/topped up the coolant or put air in your tyres.

Did the manufacturers forget on purpose to do a little bit of "programming"/sensor installation to make this as easy as filling up your fuel tank.

REgards Neil

On the earlier models, they did have a separate additive ECU, and these did have a measuring function. There was a float measuring system in the additive tank. However because of ongoing problems they soon disabled the measuring function from the additive ECU.

Because they had so many problems with having to replace the actual additive ECU, they’ve now done away with that altogether and transferred the function to the engine management ECU. I guess they think they can perform the same function with less additionality. At the end of the day you really only need to perform this operation once or twice over the life of the vehicle.

[Harlequin]

i had a mk 1 2.2 HDi with DPF, and the ECU in teh OS sill. There was no float in the tank.

[Peter.N.]

I think I will need a code reader of some sort. I have two Lexias but neither work, is the old lexia equiped to deal with the X7?

Peter

[GiveMeABreak]

i had a mk 1 2.2 HDi with DPF, and the ECU in teh OS sill. There was no float in the tank.

Actually there is a level sensor in the additive tank on your 2.2 (C5 MK I DW12TED4) Simon. I'm not in the habit of making it up, but it may not be what you might suspect of an arm and float, but there is a sensor there.

The tanks additive tanks were still shipped with the hardware in, but the measuring function was disabled and removed from the additive ECU software. It is just not used as I said previously.

If it's necessary to prove it - item 40 on the Diagram:
Click Diagram to Zoom

Ref	Designation	Ref	Designation
1	Additional heater control relay	39	Additive tank
2	additional heating (electrical resistors (2a) or heater (2b)) (*)	40	Low additive level sensor
3	Variable geometry turbocharger	41	Additive injection pump
4	Air flow meter Air temperature sensor	42	Fuel tank
5	Air cleaner	43	Additive injector
6	catalytic converter	44	Booster pump (low pressure)
7	Particle filter	45	Electric fuel heater
8	Exhaust gas temperature sensor (downstream of the catalytic converter)	46	engine coolant temperature sensor
9	Differential pressure sensor	47	Plug (overflow)
10	Exhaust gas temperature sensor (upstream of the catalytic converter)	48	Safety valve
11	Turbocharging pressure regulation solenoid valve	49	Fuel tank cap presence sensor (*)
12	Recycling regulation electrovalve (EGR)	50	Centralised diagnostic socket
13	Finned diffuser piston control pneumatic capsule	51	Battery
14	Exhaust gas recycling valve (EGR)	52	Injection double relay (engine relay unit)
15	Water-to-air heat exchanger (inlet air heating)	53	Vehicle speed sensor
16	Exhaust gas/water exchanger (EGR)	54	Accelerator pedal position sensor
17	Inlet air heater throttle control electrovalve	55	Clutch pedal switch
18	atmospheric pressure sensor (integrated in the injection ECU)	56	Brake pedal switch
19	injection ECU	57	Pre-post heat box
20	Heated rear screen	58	Fuel cooler
21	Stability control ECU (*)	59	Fuel filter
22	Automatic gearbox ECU (*)	60	Engine speed sensor
23	Trip computer (*)	61	Camshaft position sensor
24	Electronic tachometer	62	Pre-heater plugs
25	Service LED	63	Fuel high pressure common injection rail
26	Pre-heating warning light	64	High pressure fuel sensor
27	Diagnostic warning lamp	65	Fuel temperature sensor
28	Fuel level indicator	66	High pressure fuel regulator
29	Fan	67	high pressure fuel pump
30	air conditioning compressor	68	3rd piston deactivator on the high pressure fuel pump
31	Engine coolant temperature warning light	69	Diesel injectors
32	Engine coolant temperature gauge	70	"Swirl" control electrovalve
33	Built-in systems interface	71	"Swirl" control diaphragm
34	Cruise control switch	72	Inlet air heater throttle
35	Cruise control safety contact	73	Throttle butterfly housing (EGR)
36	Cruise control switch	74	air/air heat exchanger
37	Switch module (at the steering wheel)	75	Throttle housing control electrovalve (EGR)
38	Fuel additive ECU	76	Inlet manifold pressure sensor

[Harlequin]

And yet when my own car had the eolys tank replaced it was simply that - a tank, with nothing in it. The additive injection pump is located next to the fuel tank pump

[GiveMeABreak]

The injector pump (43) is in the fuel tank (42) but the additive injection pump (41) is inside the additive tank. The level sensor is probably incorporated into that.

[bobins]

I think I will need a code reader of some sort. I have two Lexias but neither work, is the old lexia equiped to deal with the X7?

Peter

Depends on what you mean by 'old Lexia' ? Mine dates from (at a guess) 2013-ish. I got it from EasyDiagnostics and it works well. I've updated it successfully to a decent and stable version (x.57 ????). The OBD port for the X7 is located in the base of the centre armrest. You open the lid and pull up the rubber mat on the bottom.

[Peter.N.]

One I have had for 10 years or more but I bought another probably 3 or 4 years ago. I will try and get one hooked up and se if at least it displays the X7 on the list. What do I have to enter to get it to connect?

Peter

[moizeau]

Is there anyone close to you that can swap interfaces, 'puters, try yours with theirs etc?

[GiveMeABreak]

If it's older than 10 years is will likely be an older Revision 'B' interface and you will need a CAN version for the X7 or it wither won't recognise some or all of the ECUs. This all depends on what hardware is inside the VCI of course. These clones are not all made equal, but no harm in trying.

[admiral51]

Should I really have bought this car

Peter

Ah well that is a question that only you can answer, but maybe it is a question you have asked yourself before

If you can get your head around the complexities of XM hydraulics and wiring then the C5 X7 will be a walk in the park for you, trouble is now you have to talk to the car first to find out what it says is wrong with it before you then talk to the uninterested parts person who has no idea what is wrong and has no intention of believing what you say is wrong even though you know what you need to sort the issue out

So the only real difference is now when you talk to the car it actually talks back, you just need to a computer to talk to it and understand the reply

[admiral51]

I find this "you have to tell the car you have topped up the fluid" a bit unbelievable. What next...you need to tell the car you have put more petrol in/topped up the coolant or put air in your tyres.

Did the manufacturers forget on purpose to do a little bit of "programming"/sensor installation to make this as easy as filling up your fuel tank.

REgards Neil

I hate to burst the bubble but for a good few years a certain German HGV manufacturer has had a BSI system where by that it tells you the brake pads are low, you can replace them yourself and the BSI will acknowledge the new pads thickness,the dash will show new pad thickness, but you will need a dealership machine ( Lexia as example) to tell the BSI that they have been changed to remove the low brake pad warning lamp. It can even pass a full manual MOT brake test,no issue with braking pressures etc but will fail as a warning is showing on the dash

Yes they did forget on purpose

[NewcastleFalcon]

Its the same when I read about the "battery disconnect dance". How much extra "programming" would be required to simply invoke a "safely remove hardware" procedure by clicking on an option "safely disconnect battery", or even old school pressing a button which performs the dance for you without you having to remember the steps!

Silly me...its always payday for the Dealer Service Centres when the poor punter screws something up by forgetting a step and the windows dont work any more, or worse still the car wont start!

REgards Neil