Merchy wrote:

Apparently there is an earthing point near the fuse box in passenger footwell.

The below is the only other thing I have found relating to L405 earths, I do not know if this applies to your car.

https://www.google.com/url?esrc=s&q=&a...ehptmmBqXm

Hopefully someone should be able to point you in the right direction soon

just a thought have you checked to see if all your belts are intact and tight?

Just back from holiday and scanned ECUS with IID Tool, here’s the results. Some of the faults have cleared but still 16 present! Anybody see any clues amongst all this! Thanks in advance….

L405 - Range Rover 2013
Vehicle scanned on 09-07-2022 12:22
Using IIDTool BT V4.0 B2691

ACM-Audio System

U2005-62 (2C) Vehicle speed - Algorithm based failure - signal compare failure
ATCM-Terrain Response

U0121-00 (2F) Lost communication with ABS control module
( on 09-07-2022 12:18:04 at 182959 km )
U3003-62 (2F) Battery voltage - Algorithm based failure - signal compare failure
( on 09-07-2022 12:18:04 at 182959 km )
BCM-Body Control

B123B-15 (6C) Front right turn signal - General electrical failure - circuit short to battery or open
( on 02-07-2022 10:40:42 at 182959 km )
U0121-00 (2F) Lost communication with ABS control module
( on 02-07-2022 10:31:31 at 182959 km )
B1C99-15 (6C) Right corner lamp circuit - General electrical failure - circuit short to battery or open
( on 02-07-2022 10:31:31 at 182959 km )
CCM-Cruise Control

U0121-00 (AF) Lost communication with ABS control module
( on 02-07-2022 10:31:31 at 182959 km )
U3003-16 (2E) Battery voltage - General electrical failure - circuit voltage below threshold
( on 09-07-2022 12:18:19 at 182959 km )
CHCMB-Chassis Control

U300A-64 (2C) Ignition switch - Algorithm based failure - signal plausibility failure
( on 02-07-2022 10:32:52 at 182959 km )
U300A-62 (2C) Ignition switch - Algorithm based failure - signal compare failure
( on 02-07-2022 10:32:52 at 182959 km )
U0100-00 (2C) Lost communication with engine control module/powertrain control module 'A'
( on 02-07-2022 10:33:02 at 182959 km )
U0101-00 (2C) Lost communication with transmission control module
( on 02-07-2022 10:33:02 at 182959 km )
U0121-00 (AF) Lost communication with ABS control module
( on 02-07-2022 10:31:31 at 182959 km )
CHCM-Chassis Control

U0121-00 (AF) Lost communication with ABS control module
( on 02-07-2022 10:31:31 at 182959 km )
HCM-Headlamp

B1D65-87 (AF) Motor operation malfunction of right actuator - Bus signal/message failure - missing a message
( on 02-07-2022 10:31:35 at 182959 km )
U0121-00 (AF) Lost communication with ABS control module
( on 02-07-2022 10:31:34 at 182959 km )
HVAC-Ventilation

B105A-97 (2 Cabin temperature sensor fan - Component failure - component or system operation obstructed or blocked
( on 24-06-2022 11:24:06 at 182819 km )
B12B9-16 (2C) Auxiliary heater control module - General electrical failure - circuit voltage below threshold
( on 03-07-2022 14:05:17 at 182959 km )
IPC-Instrument Pack

U0121-00 (2F) Lost communication with ABS control module
( on 02-07-2022 10:34:23 at 182959 km )
IPMB-Camera

B12C0-19 (2F) Left mirror camera - General electrical failure - circuit current above threshold
( on 24-06-2022 12:14:07 at 182819 km )
B12C0-31 (6 Left mirror camera - Frequency modulation/pulse width modulation failure - no signal
( on 26-06-2022 15:19:00 at 182908 km )
B12C0-49 (2 Left mirror camera - System internal failure - internal electronic failure
( on 24-06-2022 11:24:01 at 182819 km )
U201A-51 (2 Control module main calibration data - System programming failure - not programmed
( on 11-11-2026 09:41:58 at 0 km )
PAM-Parking Aid

U0121-87 (6C) Lost communication with ABS control module - Bus signal/message failure - missing a message
( on 02-07-2022 10:39:27 at 182959 km )
U0415-86 (6C) Invalid data received from ABS control module - Bus signal/message failure - signal is invalid
( on 02-07-2022 10:39:27 at 182959 km )
PBM-Parking Brake

U0121-00 (AF) Lost communication with ABS control module
( on 02-07-2022 12:49:37 at 182959 km )
U3006-16 (2C) Control module input power A - General electrical failure - circuit voltage below threshold
( on 03-07-2022 14:38:00 at 182959 km )
PCM-Engine TDV8

U0416-68 (2F) Invalid data received from vehicle dynamics control module - Algorithm based failure - event information
( on 02-07-2022 10:31:31 at 182959 km )
P040D-00 (2F) Exhaust gas recirculation temperature sensor A - circuit high
( on 24-06-2022 11:24:02 at 182819 km )
U0415-68 (2F) Invalid data received from ABS control module - Algorithm based failure - event information
( on 02-07-2022 10:31:31 at 182959 km )
P0700-00 (2F) Transmission control system (malfunction indicator lamp request)
( on 02-07-2022 10:33:05 at 182959 km )
U0121-00 (2F) Lost communication with ABS control module
( on 02-07-2022 10:31:31 at 182959 km )
PSCM-Power Steering

B1304-16 (2E) Electronic power assisted steering system - General electrical failure - circuit voltage below threshold
( on 09-07-2022 12:18:19 at 182959 km )
U0121-31 (2F) Lost communication with ABS control module - Frequency modulation/pulse width modulation failure - no signal
( on 02-07-2022 10:31:31 at 182959 km )
U3001-00 (2F) Control module improper shutdown
RCM-Airbag

U0121-00 (2B) Lost communication with ABS control module
( on 02-07-2022 10:31:31 at 182959 km )
SODL-Left Side Object

U0415-68 (2F) Invalid data received from ABS control module - Algorithm based failure - event information
( on 02-07-2022 10:31:33 at 182959 km )
U3003-62 (2 Battery voltage - Algorithm based failure - signal compare failure
( on 25-06-2022 08:41:33 at 182879 km )
SODR-Right Side Object

U0415-68 (2F) Invalid data received from ABS control module - Algorithm based failure - event information
( on 02-07-2022 10:31:33 at 182959 km )
U3003-62 (2 Battery voltage - Algorithm based failure - signal compare failure
( on 25-06-2022 08:41:33 at 182879 km )
SPMA-RH Seatbelt Pretens

U0001-87 (2F) High speed CAN communication bus - Bus signal/message failure - missing a message
( on 02-07-2022 10:31:33 at 182959 km )
SPMB-LH Seatbelt Pretens

U0001-87 (2F) High speed CAN communication bus - Bus signal/message failure - missing a message
( on 02-07-2022 10:31:33 at 182959 km )
TCCM-Transfer Case

U3003-16 (2E) Battery voltage - General electrical failure - circuit voltage below threshold
( on 09-07-2022 12:18:20 at 182959 km )
U0001-87 (2F) High speed CAN communication bus - Bus signal/message failure - missing a message
( on 02-07-2022 10:31:31 at 182959 km )
TCM-Transmission

U0121-63 (AF) Lost communication with ABS control module - Algorithm based failure - circuit/component protection time out
( on 02-07-2022 10:31:31 at 182959 km )
P279D-02 (2F) Four wheel drive range signal circuit - General failure information - general signal failure
( on 02-07-2022 10:31:31 at 182959 km )
TVM-Television

U3000-49 (2 Control module - System internal failure - internal electronic failure

Does anybody know if I can get into the boot area - the button and remote are not opening it. It has executive seating so climbing into the boot appears to be impossible! Can the IID Tool open the tailgate? Thanks in advance….

I am assuming that you were on your hols when this all started -

Unless you have some serious wiring damage somewhere or water ingress, which seems unlikely, then all this still points to battery / earth wires and other wires to the battery / connections / alternator & connections etc.etc.
You would have to get further advice about a hard reset on an L405 from someone else with more knowledge than me, but could be a plan, and will cost nothing but a little time.

I would start with all that or go to a reputable Indy / auto electrical oufit, or similar and get them to test the battery / systems, because there are so many completely unrelated faults that there must be a common cause for all these faults.

Just to indicate these types of problems, read the current thread 'Car just died, any ideas?' initially it seemed to be
a horrendous problem and turned out to be a battery cable problem, that affected everything.

Just had a thought, in addition to my above waffle, as you have not reported any other faults with the car, are most of these systems actually working ? If so then the above is most likely to be your problem. Hope this helps.

Thanks again Merchy, fault code U0121-00 (abs module) appears in a lot of the list of faults. The biggest issue I have at the moment is getting into the boot area as it’s electric and won’t open, made worse as I can’t climb in (see above post)…I’m hoping the IID Tool can open it!

Have you checked the earth's in the front arch, as previously advised?

Mikey's idea would be a good place to start - also if you want to charge the battery from under the bonnet, check the below thread, including pics. As before on the screen on the L322 you can get the battery charging voltage on the display, I would think this SHOULD be possible on yours, but don't take this as gospel.

https://www.fullfatrr.com/forum/topic58249.html

Mikey wrote:

Have you checked the earth's in the front arch, as previously advised?

Hi Mikey, I’m just back from holiday today and ordered an IID Tool whiltst I was away. I haven’t checked the earthing points as the supplying garage has told me this afternoon to take it to a main dealer to have it repaired, at their expense…..many thanks for your guidance and I’ll let the forum know the outcome…..the unlocking tailgate is a mystery in all this. Thanks again

Ps. I intend to come to you guys for my 120 month service…my mother lives in Crail, Fife so you’re not too far away

See the thread -

https://www.fullfatrr.com/forum/topic62384.html

As Mikey suggested, this could well be the problem, at least point the dealer in that direction, as some main dealer staff are not the best at fault diagnosis. Not all, but seems to be pot luck from comments on here.
At least you will not be paying for the work.

Thanks again Merchy, I’ve just read that thread - pretty much identical IID Tool fault list I have (with the exception of the tailgate which won’t open)…I’m sure the earth connection/s will be the cause. I’ll give the dealer the IID faults list and Mikey’s suggestion. Next thing is to arrange for a recovery truck to take it there on Monday - 160 mile round trip!

Well, it got worse (flat battery) then it got better (after jump start the tailgate came back to life). I think I’m going to have a look at the earth connection in the o/s/f wing tomorrow.

Mikey, is if correct to say that it’s just the front part of the underwing that has to be removed (5 or 6 screws)?

Thank you

Correct, just the front part

Well done Mikey! Exactly as you diagnosed - earth connection under o/s front wing…..well done!

I ended up having it recovered to dealer by the AA as warranty is covering costs…..£350 + vat😮

Definitely worth checking this as it cripples the 405!

Thanks again Mikey!

Quite common, you see

Easy to diagnose, easy to repair