Hi all, I bought the vehicle from Copart. It was showing some faults, one of which was "SOS limited functionality". My research showed the batteries in the TCU are flat. I bought the batteries from LR. My research showed several locations for the TCU module. Its not in the boot, nor is it behind the rear passenger or drivers side door. I've also had a quick look around the steering column, I removed the side panel and the lower panel by the pedals and can't see it there, I have not removed the panel at the steering column yet. I spoke to a breakers and he told me it was in the middle of the dash, but the part he had listed was metal and not the same as the module that takes the batteries, as it did not have the flap/cover you remove to replace the batteries. This is the link he sent: ebay item eBay Item No. 276906728784. This is what my research came up with: ebay item eBay Item No. 276815252126 I don't want to be buying any parts until I'm 100% sure mine is missing or in a completely different location. Can anyone help please?

First link is the bluetooth module, second link is correct, on 2014-2016 builds it is directly below the steering wheel mounted on the horizontal dash support bar - you'll need to remove the dash centre section below the steering wheel to get access to it (centre console right hand side trim needs to also be removed as the centre section pegs into this).

If the batteries are flat you'll also need to tell the tcu the battery has been replaced, GAP tool can't do it, but SDD will, not sure about other diag tools.

The battery pack consists of 2 batteries, a lithium non-rechargeable and a rechargeable NiMh, if it's stood for extended periods the NiMh will go flat and then it reverts to the Li battery and when this goes flat it's game over.

Brilliant, thx for the info. I'll get up there tomorrow and remove those panels, find the module and replace the batteries which I have bought from Hatfield's. I have Icarsoft Max diagnostics so should be able to program them in. Then all that's left to do is the DPF, oil cooler gaskets, fresh coolant, brake fluid and oil and filter. Thx again, much appreciated. I'm quite enjoying working on and learning about Land/Range Rovers. Nearly every garage I approached pulled a funny face and refused to look at it haha.

2 RRS wrote:

First link is the bluetooth module, second link is correct, on 2014-2016 builds it is directly below the steering wheel mounted on the horizontal dash support bar - you'll need to remove the dash centre section below the steering wheel to get access to it (centre console right hand side trim needs to also be removed as the centre section pegs into this).

If the batteries are flat you'll also need to tell the tcu the battery has been replaced, GAP tool can't do it, but SDD will, not sure about other diag tools.

The battery pack consists of 2 batteries, a lithium non-rechargeable and a rechargeable NiMh, if it's stood for extended periods the NiMh will go flat and then it reverts to the Li battery and when this goes flat it's game over.

Have you done as i said and told the tcu it has a new battery installed, no dice until you do that!

I tried to using icarsoft max. I couldn't find how to tell it I installed a new battery. I cleared the code but it came back. I'm going to research the 4 code faults it gave me. I'm new to all this, esp electronics.

Thx

Scott

2 RRS wrote:

Have you done as i said and told the tcu it has a new battery installed, no dice until you do that!

Saw you posted on an old thread of mine over on ffrr.com, I've got an L405 too and use 4RRS over there.

I think once you tell it the battery has been replaced, the rest of the dtc's will go away, certainly the thing to do first anyway. Haven't seen the option on my v3 IID, tool although someone posted over on the ff forum it's included for later model years, have to see if there is an update available for mine.

With regards to the tcu being loosely bolted in, what's the history on the car, was it marked as stolen and recovered by Copart? Could well be someone has had a go at it already? You'd need to interrogate the tcu and see if the vin matches up if this is the case.

It was listed as Cat N. It had no body damage, just a snapped control arm. Its a bit scruffy but will clean up nice. I'm documenting the work I do and get done. I've done air, pollen and fuel filter, full set of drilled/grooved discs and pads and the main and aux batteries and an ign module and new key and fob. Once this TCU is done, I'm doing the oil cooler, and while I'm there I'll replace that O ring that leaks coolant between the V. A stud snapped front left hub so that needs doing, Fresh oil/filter, coolant and brake fluid, serpentine belt and tensioners, mot, drive it for a few months to see and iron out any issues, then detail it, sort out the minor scuffs, get the wheels refurbed and sell it. Hopefully I'll make a worthwhile profit.

2 RRS wrote:

Saw you posted on an old thread of mine over on ffrr.com, I've got an L405 too and use 4RRS over there.

I think once you tell it the battery has been replaced, the rest of the dtc's will go away, certainly the thing to do first anyway. Haven't seen the option on my v3 IID, tool although someone posted over on the ff forum it's included for later model years, have to see if there is an update available for mine.

With regards to the tcu being loosely bolted in, what's the history on the car, was it marked as stolen and recovered by Copart? Could well be someone has had a go at it already? You'd need to interrogate the tcu and see if the vin matches up if this is the case.