Member Since: 22 Apr 2012
Location: Rome
Posts: 2312
Hi, mine has similar problem on transmission fault, using my iidtool and only reading the " non confirmed faults" it says this:
Transmission
P0783-23 (27) 3-4 shift - General signal failure - signal stays low
Somebody from ZF told me that is a typical advisory when it's time to have a transmission flush because the very small metallic parts inside the transmission oil have a magnetic effect on the mechatronic unit and cause an electric trigger on the 3rd to 4th gear control switch.
It's curious that this happen only in "low gear"
I'll have an hard flush next month and i will check again- Easy-Lift suspension module 4.0
- GoodWinch 9500 lb
- Full underbody protections
- Tree/Rock sidebars
- Prospeed roofrack & ladder
- Compressor guard
- Raised Air Intake
- Driving lights (2+4)
- 50 mm Waffle boards
- Altox Heater control
- Overland Rooftop Tent
- Rear seats entertainment
- Front & Rear camera
- GVIF
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- Cubby box fridge
- BFG KO2 265/65R17
- iidTool BT
22nd Nov 2015 6:47 pm
lanend
Member Since: 06 Jul 2014
Location: Berkshire
Posts: 17
Lost for Words wrote:
Hi Bryn,
What mileage are you at - sorry, this was what I meant when I asked before (Bryn sent me a PM, BTW, for any confused onlookers!)?
What voltage is the alternator outputting?
I'm afraid a genuine gearbox issue (of some kind) is now looking probable. Have you had any judder at all?
Hi Olly
The Alternator output is 15.1 volts, and I have been reading some of the threads on this subject. (Hopefully not a problem) I left Mike with some codes, speaking to Mark my nephew who connected the Diagnosis machine to the disco, who said he cleared the codes initially re ran the software and the only code that came up was n/s EGR valve I did locate a new one and spent almost 2 days fitting it, It would appear at the minute that everything is running ok now, we shall have to wait and see.
best regards
Bryn is1994 300TDI Disco1 manual (hers)
1998 300TDI Disco1 Auto (mine)
2006 Disco 3 commercial Auto (mine)
29th Nov 2015 12:14 am
lanend
Member Since: 06 Jul 2014
Location: Berkshire
Posts: 17
Olly
sorry about the 'is' after my name, probably tired, forgot to answer another of your questions, there is no judder at present.
Bryn1994 300TDI Disco1 manual (hers)
1998 300TDI Disco1 Auto (mine)
2006 Disco 3 commercial Auto (mine)
29th Nov 2015 12:35 am
lanend
Member Since: 06 Jul 2014
Location: Berkshire
Posts: 17
Sidestick wrote:
Hi, mine has similar problem on transmission fault, using my iidtool and only reading the " non confirmed faults" it says this:
Transmission
P0783-23 (27) 3-4 shift - General signal failure - signal stays low
Somebody from ZF told me that is a typical advisory when it's time to have a transmission flush because the very small metallic parts inside the transmission oil have a magnetic effect on the mechatronic unit and cause an electric trigger on the 3rd to 4th gear control switch.
It's curious that this happen only in "low gear"
I'll have an hard flush next month and i will check again
Hi Sidestick
Please let me know what difference the hard flush makes mate and what procedure it was done in. I mean how they did the actual procedure and what it feels like afterwards and a rough idea how much it cost.
best regards
Bryn1994 300TDI Disco1 manual (hers)
1998 300TDI Disco1 Auto (mine)
2006 Disco 3 commercial Auto (mine)
With 141k on the clock, and I'm assuming you've never had a flush/fluid change, then gearbox problems are also not unlikely.
Gearbox flushing is done via the oil cooler, and costs around £250-300. If you catch it very soon, it can save a failing torque converter, but primarily is of use as a prevenitive measure. Flushing a high mileage box carries the risk that it will cause other (existing) gearbox issues to show themselves, due to the removal of contaminants - in short, if your gearbox has issues, it may well make them worse.
15.1V is at the high end of accpetable - You may want to investigate your battery.
I would recommend you blank your EGRs - simple and cheap for an 06MY.
3...2...1...Here comes DDDad!Current: Discovery 3 06MY (55 reg) HSE Auto Zambezi Silver Allisport Fast Road Intercooler, V8 Brakes, Silicone IC Hoses, EGRs Blanked, Remapped, De-Cat pipe, FBHIC
Freelander 2 2007 HSE Manual Tambora Flame
Previous: FL2 56 reg SE Manual Black (written off )
Disco 3 06 reg B7S Manual Rimini Red
Disco 2 TD5 Y reg ES Manual Blue - Chipped
Several Discovery 300 TDis
29th Nov 2015 11:26 am
lanend
Member Since: 06 Jul 2014
Location: Berkshire
Posts: 17
Hi Olly
You guys are real diamonds I mentioned to Mike earlier in the thread that the EGR's were already blanked off, it appears that the electrical side stilll works as such, my nephew was saying that unless it is programmed out it will still believe it's operational and will cause all sorts of problems. At the minute it is running nice and changing up and down ok, no surging etc, these electronics!! why are they so complex? I am not going to flush at all unless something happens mate.
I am going to get the battery checked next, reading some of the threads on the forum it doesn't necessarily mean alternator with that 15.1 charging, also it seems like it is a special battery as well, is that right? It's never had a gbox flush Olly
Appreciative of all the help you are giving
Bryn1994 300TDI Disco1 manual (hers)
1998 300TDI Disco1 Auto (mine)
2006 Disco 3 commercial Auto (mine)
Blanking EGRs only needs the software modification on EU4 vehicles (07MY onwards), so if yours is 06MY you don't need this. Current: Discovery 3 06MY (55 reg) HSE Auto Zambezi Silver Allisport Fast Road Intercooler, V8 Brakes, Silicone IC Hoses, EGRs Blanked, Remapped, De-Cat pipe, FBHIC
Freelander 2 2007 HSE Manual Tambora Flame
Previous: FL2 56 reg SE Manual Black (written off )
Disco 3 06 reg B7S Manual Rimini Red
Disco 2 TD5 Y reg ES Manual Blue - Chipped
Several Discovery 300 TDis
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Allisport Fast Road Intercooler, V8 Brakes, Silicone IC Hoses, EGRs Blanked, Remapped, De-Cat pipe, FBHIC
I mentioned to Mike earlier in the thread that the EGR's were already blanked off, it appears that the electrical side stilll works as such, my nephew was saying that unless it is programmed out it will still believe it's operational and will cause all sorts of problems. At the minute it is running nice and changing up and down ok, no surging etc, these electronics!! why are they so complex? I am not going to flush at all unless something happens mate.
