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albertocsm

Member Since: 14 Mar 2023
Location: Aveiro
Posts: 8

2011 Range Rover Vogue 4.4 V8 Zambezi Silver

ABS fuse keeps blowing up

Hi all,
My 2011 4.4 TDV8 has started acting up - Christmas tree style.
I grabbed the faults with IID, and this is what came up:

Quote:

ADCM-Active Damping
U0121-00 (AF) Lost communication with ABS control module ( on 28-08-2023 19:52:33 at 144156 km )

ATCM-Terrain Response
U0121-00 (2F) Lost communication with ABS control module ( on 28-08-2023 19:52:33 at 144156 km )

BCM-Body Control
U0121-00 (2F) Lost communication with ABS control module ( on 28-08-2023 19:52:34 at 144156 km )
CCM-Cruise Control
U0121-00 (AF) Lost communication with ABS control module ( on 17-07-2027 18:24:38 at 0 km )

IPC-Instrument Pack
U0121-00 (2F) Lost communication with ABS control module ( on 28-08-2023 19:52:36 at 144156 km )

PBM-Parking Brake
U0121-00 (2B) Lost communication with ABS control module ( on 28-08-2023 19:52:38 at 144156 km )

PCM-Engine TDV8 4.4L
U0416-68 (2F) Invalid data received from vehicle dynamics control module - Algorithm based failure - event information
( on 28-08-2023 19:52:38 at 144156 km )
U0415-68 (2F) Invalid data received from ABS control module - Algorithm based failure - event information
( on 28-08-2023 19:52:38 at 144156 km )
P0700-00 (2A) Transmission control system (malfunction indicator lamp request) ( on 28-08-2023 19:52:38 at 144156 km )
U0121-00 (2F) Lost communication with ABS control module
( on 28-08-2023 19:52:38 at 144156 km )

RCM-Airbag
U0121-00 (AA) Lost communication with ABS control module ( on 28-08-2023 19:52:39 at 144156 km )

RDCM-Rear Differential
U0121-00 (7F) Lost communication with ABS control module
( on 28-08-2023 19:52:39 at 144156 km )
U0415-68 (7F) Invalid data received from ABS control module - Algorithm based failure - event information
( on 28-08-2023 19:52:39 at 144156 km )

RLM-Suspension
U0122-00 (AF) Lost communication with vehicle dynamics control module ( on 28-08-2023 19:52:40 at 144156 km )

TCCM-Transfer Case
U0121-00 (2F) Lost communication with ABS control module ( on 28-08-2023 19:52:43 at 144156 km )

TCM-Transmission 6spd
U0121-63 (27) Lost communication with ABS control module - Algorithm based failure - circuit/component protection time out
( on 28-08-2023 19:52:44 at 144156 km )
P279D-02 (2F) Four wheel drive range signal circuit - General failure information - general signal failure
( on 28-08-2023 19:52:44 at 144156 km )

After looking around on the forum, I found a post that mentions a similar set of faults. Some fellows pointed to a possible corrosion issue on the ABS module ground wire. I gave it a good brush, but it didn't help.
I also completely disconnected the ABS module, looking for any issues with the connector. There was no corrosion or dirt whatsoever in there.

After some more digging, I found that fuse FA4 (10A) in the engine compartment fuse box was blown. I replaced it and all the faults went away.

The car idles just fine, and the fuse holds up. I can enable special driving programs, HDC and change the suspension hight.
However, as soon as the car starts moving, the fuse blows again. I'm talking about a distance of maybe 10 meters at most.

Do you have any ideas on where I should look next?

Possibly relevant information:
1) Although I'm not able to reproduce it at this point, I tested driving it with the ABS module connector unplugged, and the fuse still blew up. I could swear I saw it happen twice, but I might be getting a bit paranoid/confused at this point.
2) This issue happened immediately after I power washed the vehicle (though not the engine bay).
3) A couple of weeks ago, the vehicle's gearbox was serviced by a professional. Changed the gearbox oi, filter, etc. I've done over 1000 km after this maintenance was done with no issues at all.

31st Aug 2023 12:31am

Phoenix

Member Since: 16 May 2022
Location: Gone
Posts: 1631

Then it will be a component connected to the same circuit and in the same group - yaw rate or steering angle sensor for instance. Check the wiring diagram to see what else the fuse also supplies.

31st Aug 2023 7:14am

GraemeS

Member Since: 07 Mar 2015
Location: Wagga area
Posts: 2664

According to the wiring schematic that fuse only supplies the ABS module. I would look for chaffed wires between the aux fuse box and the ABS module on a loom section that can move. The bundle is 1.5M long.

PS. I recently found that the cause of intermittent park brake errors, initially after driving through puddles but then even when dry that started a couple of years ago was a wire near the park brake module had rubbed and worn through the insulation. I hadn't properly secured the harness when I retro-fitted an e-diff about 6 years ago.

31st Aug 2023 8:10am

albertocsm

Member Since: 14 Mar 2023
Location: Aveiro
Posts: 8

can you please point me to the wiring schematics?
the one i’ve found doesn’t seem to include the engine bay fuse box or this particular ABS fuse (FA4/10A)…

31st Aug 2023 10:48am

GraemeS

Member Since: 07 Mar 2015
Location: Wagga area
Posts: 2664

I don't recall from where I got my diagrams but here's the auxilliary engine junction box.
https://www.fullfatrr.com/gallery/albums/u...0box~0.pdf
[/url]

31st Aug 2023 11:25am

albertocsm

Member Since: 14 Mar 2023
Location: Aveiro
Posts: 8

Quote:

I don't recall from where I got my diagrams but here's the auxilliary engine junction box.
https://www.fullfatrr.com/gallery/albums/u...0box~0.pdf

👍👍👍

31st Aug 2023 12:22pm

albertocsm

Member Since: 14 Mar 2023
Location: Aveiro
Posts: 8

GraemeS, do you know if there is a relay for the ABS module?
if so, where is it located?
i can see one in this[1] diagram, but im not sure where this is or even if this applies to this specific vehicle model (2011 TDV8).

[1]
https://www.fullfatrr.com/gallery/albums/u...0box~1.pdf

31st Aug 2023 1:35pm

GraemeS

Member Since: 07 Mar 2015
Location: Wagga area
Posts: 2664

The wiring schematic doesn't show any relays between the fuse and the ABS module.

You stated that FA4 was blowing as soon as the vehicle moves but not before it moves, even with the ABS connector unplugged. As the wire only goes to the ABS unit, the only possible cause is a short circuit in the wiring harness between the fuse and the ABS connector.

You will need to trace the harness looking for anywhere it can rub, probably best starting at the ABS end.

31st Aug 2023 10:52pm

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