Member Since: 24 Sep 2023
Location: Highlands
Posts: 270
I'm sure it has no bearing on your problems with this car, but you might want to take the red transit plug out of the battery breather and connect the breather hose to it, especially if you are charging it overnight. Both are visible in the picture that you posted of the battery.Previously:
2010 FL2 TD4e GS
‘93 Defender 110 200TDi CSW - still got this, non-runner on SORN.
‘87 Defender 90 4 cyl Petrol
‘83 110 CSW V8 - best ever!
Range Rover 2-door V8 (not sure of year - 4-speed box and vacuum diff switch)
Series III SWB Diesel
24th Apr 2024 8:47 pm
fogaff
Member Since: 21 Jul 2020
Location: Essex
Posts: 32
Thanks. That is the spare battery that was thrown in there in case mine was duff. The other end is vented.
Usually my proper battery has the tube connected 👍2005 Disco 3 TDV6 SE Auto Bonatti Grey
185k and counting
24th Apr 2024 8:56 pm
Nc1989
Member Since: 28 Apr 2015
Location: Doncaster
Posts: 203
Is the picture of the clocks yours? Temp gauge at max points at canbus issues/comms issues with engine ecu surely? I’d be popping the plugs off the engine ecu and transfer case ecu behind the battery and checking for corrosion, failing that I’d be looking at sending off the clocks for checking/repair.
24th Apr 2024 10:26 pm
fogaff
Member Since: 21 Jul 2020
Location: Essex
Posts: 32
Ok thanks. Yes that is my car.
The engine ECU is the one behind the battery, right?
Where is the transfer case one?
The temp gauge has always worked fine. I did notice that it was at the top but wasn't sure if it usually goes back down to the bottom once the engine starts?2005 Disco 3 TDV6 SE Auto Bonatti Grey
185k and counting
25th Apr 2024 7:36 am
fogaff
Member Since: 21 Jul 2020
Location: Essex
Posts: 32
Hi again,
I have removed the transfer case module and all the connectors seem pretty clean. There was a tiny bit of corrosion on one side which I've cleaned up. This has made no difference.
I've also removed the 3 big plugs on the main ECU and all looks ok.
I found a different menu on my IID tool where I can access each module. For example, the parking brake one allows me to operate the unjam procedure.
All the modules I go into have a list of things I can do except for the PCM. That has no list at all. Is that because it can't communicate with it? Now, is the PCM the one behind the TCM behind the battery, or is it a different one? If so, where the heck is it???
Also, as an aside, when I unplugged the TCM there was another pair of wires hanging down that weren't connected to anything. I found what they were me to be plugged into and thought that it must have fallen out and there was the solution. It wasn't 😔 Photo of these wires attached.
So, where is this pesky PCM located?
Thanks!
Click image to enlarge
2005 Disco 3 TDV6 SE Auto Bonatti Grey
185k and counting
26th Apr 2024 1:49 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13670
Plse have a look at the ECM as there is an internal cooling fan inside so that might be for that , if not will be the transport connector
Last edited by gstuart on 26th Apr 2024 2:22 pm. Edited 1 time in total
26th Apr 2024 2:13 pm
fogaff
Member Since: 21 Jul 2020
Location: Essex
Posts: 32
Cheers, I found it. It was quite obvious.
My main query is where is the PCM. Can you tell me? 👍2005 Disco 3 TDV6 SE Auto Bonatti Grey
185k and counting
26th Apr 2024 2:15 pm
fogaff
Member Since: 21 Jul 2020
Location: Essex
Posts: 32
Cheers, I found it. It was quite obvious.
My main query is where is the PCM. Can you tell me? 👍2005 Disco 3 TDV6 SE Auto Bonatti Grey
185k and counting
26th Apr 2024 2:15 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13670
Only if u say pretty plse
PCM , aka powertrain control module sits behind the TCM module
Hope that helps
Last edited by gstuart on 26th Apr 2024 2:54 pm. Edited 1 time in total
26th Apr 2024 2:46 pm
fogaff
Member Since: 21 Jul 2020
Location: Essex
Posts: 32
🤣 ok thanks, I thought as much. The one with the 3 big connectors on top
All connections seem clean and I can't see any damaged wires
Do you think the fact that my IID tool can't seem to communicate with it points to it being damaged? Please see the attached screenshot. Pretty please!2005 Disco 3 TDV6 SE Auto Bonatti Grey
185k and counting
26th Apr 2024 2:52 pm
fogaff
Member Since: 21 Jul 2020
Location: Essex
Posts: 32
Click image to enlarge
Or maybe it's because you have to have the Pro version of GAP IID Tool to access the PCM? Quite sensible that I don't have access to a pro version. Beginning to feel quite out of my depth.2005 Disco 3 TDV6 SE Auto Bonatti Grey
185k and counting
26th Apr 2024 2:59 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13670
No probs and happy to help , to be honest I can’t 100% remember with relation to PCM module
Just looked back after u done the canbus test and as there both reading around 60ohms that would indicate to me the circuit is ok, but of course that’s just on the canbus wires and not the rest so to speak
The Vdc on the second lot seem low as I was always to understand they should also read around 2.5vdc which would indicate a bad earth
Of course the more knowledgeable members would be able to confirm if that’s correct please
There are some earths that sit behind the front passengers side wheel arch liner , these earths are used by the PCM, TCM and suspension so would at least be worth giving them a clean as I had issues with not getting a 5vdc reference voltage onto my pcm, after cleaning it resolved it
I used a dremel with a wire brush to clean the terminals and post , then reinstalled them with some copperslip
Enclosed some more pics of other earths that I cleaned around the vehicle
Also strange the temp sensor is reading max like that , would at least double check the connection to ensure the wires and pins are ok
Plus of course the battery is very important with these as should read around a min of 12.6 Vdc with the engine off
Last picture where the blue bit is , that’s where the large earth connection is
Hope this may help u
Click image to enlarge
Click image to enlarge
Click image to enlarge
Click image to enlarge
26th Apr 2024 3:17 pm
gstuart
Member Since: 21 Oct 2016
Location: kent
Posts: 13670
Another thought seeing there’s a lot of FBH fault codes, wonder if it’s worth unplugging it plse , clear the codes and rescan, just to take it out of the equation so to speak
Would also get a BM2 battery monitor , ur then be able to see what the standing and crank voltage are
I’m still wondering because the landy was jump started with a very low battery if it’s spiked a module , but would assume a fuse would blow but see you’ve tested al, of them
Know it’s easy to go down a rabbit hole but hopefully working through it step by step we can try and find the answer , plus of course need to get that red light out
Just hope this is also useful to u
Picture of that battery monitor
Click image to enlarge
26th Apr 2024 3:30 pm
fogaff
Member Since: 21 Jul 2020
Location: Essex
Posts: 32
Thanks again
I have cleaned up the ground post in the wheel arch and the one forward of the battery. I'll look for the others.
Also, I have found on my IID tool that I can select the faults I'm being shown. The last readings have reported back Confirmed and Test Not Completed faults. I removed the Test Not Completed faults out of interest and was able to clear a lot of those.
B1B93-3A - Seat recline motor speed/position sensor - Frequency modulation/pulse width modulation failure - incorrect, has too many pulses (2B)
( on 25-05-2028 07:59:10 at 197297 mi )
Instrument Pack
U0100-87 - Lost communication with engine control module/powertrain control module 'A' - Bus signal/message failure - missing a message (2F)
( on 03-01-2042 07:49:57 at 197301 mi )
B1A87-68 - Battery disconnection/electronic control unit reset - Algorithm based failure - event information (2F)
( on 03-01-2042 07:34:57 at 197301 mi )
Parking Aid
B1B57-11 - Front sensors power circuit - General electrical failure - circuit short to ground (2B)
B1B58-11 - Rear sensors power circuit - General electrical failure - circuit short to ground (2B)
Parking Brake
U0100-87 - Lost communication with engine control module/powertrain control module 'A' - Bus signal/message failure - missing a message (FB)
( at 197301 mi )
Terrain Response
U0100-87 - Lost communication with engine control module/powertrain control module 'A' - Bus signal/message failure - missing a message (2B)
( on 25-05-2028 08:00:20 at 197301 mi )
Transmission
U0100-87 - Lost communication with engine control module/powertrain control module 'A' - Bus signal/message failure - missing a message (AB)
( on 25-05-2028 08:00:48 at 197301 mi )
Not sure what to do next. I'll look into that battery monitor, thanks, but it's beginning to feel like I have to get it to the independent garage £££££2005 Disco 3 TDV6 SE Auto Bonatti Grey
185k and counting
26th Apr 2024 4:20 pm
fogaff
Member Since: 21 Jul 2020
Location: Essex
Posts: 32
Oh dear. Now I think I've knackered the IID Tool. I unplugged the FBH but the tool was still plugged in. I scanned for faults and the app crashed. Now I can't seem to connect to the tool 🤬2005 Disco 3 TDV6 SE Auto Bonatti Grey
185k and counting
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🤣 ok thanks, I thought as much. The one with the 3 big connectors on top
