Hello
I have a 2004 Td6 and had a problem a few months ago when the brake lights and ignition were on when the key and igniton were in position 0. I replaced the ignition switch and it was sorted for a few months.
The problem has returned, I've cleaned the switch and checked the voltages, in position 0, the only wire apart from the live wires that has voltage is the green wire to the unloader relay terminal 15. it has around 2-3v.
I've checked the LCM, the Black 15 pin plug is giving 12v at pin 10, when the black plug is disconnected, the brakes lights are off.
It has no relation to the brake pedal, it is still on when the ABS plug is disconnected, when i remove fuse 4 for the lights, it turns off for a second and comes back on, no change with fuse 9. When the ignition is in position 1 onward, the brake lights behave as they should
I have checked all the fuses, what do you guys recon, are there any inputs to the LCM that i should check or do you think the LCM is faulty?
Thanks

Edit: I cant access the LCM using allcoms and the following faults are shown

Instrument Panel Module Fault Reading Complete...

0xEF 0x00EF No TXU1 received from Transfer Box ECU.
0xF4 0x00F4 CAN bus fault - No ID.
0xF6 0x00F6 CAN bus fault - No DMER1 received from EMS ECU.
0xF8 0x00F8 CAN busfault - No DMER4 received from EMS ECU.
0x8C 0x008C Auxiliary sense incorrect.

Body Control Module Fault Reading Complete...

0x4 0x0004 Auxiliary input fuse defective.
0xAA 0x00AA Driver door mirror horizontal motor: open circuit.

Anti-Lock Brake System Fault Reading Complete...

0x5A 0x005A Temporary system deactivation.

and a Can Bus error on the air suspension but that clears once the car has been driven

Last edited by Qahmed95 on 2nd Mar 2019 5:01pm. Edited 1 time in total

You sure it isn't a dodgy brake light switch under the pedal ? .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember
Volvo V70 P2 2006 2.4 Petrol 170bhp Estate SE
MG Midget Mk1 1962

Previous: L322 Range Rover TDV8 3.6 2008; L322 Range Rover TD6 3.0 2002; P38A Range Rover V8 1999

Just can back from a short drive, the air suspension lights and the cluster lights stay on after the key is removed showing the P light or a faint handbrake light. This is along with the brake lights on. I checked the resistance of the switch at the different positions and at 0, there is no contact between any two pins.
there is also no central locking, the fob is not working. ill get some more codes
Does anyone know about the green wire to the unloader relay, should it have any voltage on it.
Thanks

If it was to do with the brake light switch, would it not also play up when the car is started. once the ignition is at position 1, the brake lights are off and work as normal with the pedal.

It is a Range Rover, anything can happen

However, your issue does seem a little more involved.... .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember
Volvo V70 P2 2006 2.4 Petrol 170bhp Estate SE
MG Midget Mk1 1962

Previous: L322 Range Rover TDV8 3.6 2008; L322 Range Rover TD6 3.0 2002; P38A Range Rover V8 1999

It does feel as though things go wrong more often than not, when its working its absolutely beautiful and a pleasure to drive. However, when the issues do come, they all come at once.

I checked with Allcoms again and have the following code, if anyone can shed any light on the Auxiliary input fuse defective.

Anti-Lock Brake System Fault Reading Complete...

0x5A 0x005A Temporary system deactivation.
0x8B 0x008B Transfer gearbox CAN error.

Air Suspension System Fault Reading Complete...

0x32 0x0032 CAN bus Fault.


Body Control Module Fault Reading Complete...

0x1 0x0001 Rear windowlift fuse defective.
0x2 0x0002 Interior lights fuse defective.
0x38 0x0038 Open circuit activation SRA, DRM 2.
0x4 0x0004 Auxiliary input fuse defective.

Sending M57 Diesel Engine Module Communications.

0404 0404 Exhaust Gas Recirculation 2
1260 1260 Delivery Pump Control System
1613 1613 MAP Control
1DF5 1DF5 EWS – Timeout
1E00 1E00 CAN Communication to ASC
3505 3505 Glow Plug System

Instrument Panel Module Fault Reading Complete...

0xBD 0x00BD EBV function fault received from ABS ECU.
0xEF 0x00EF No TXU1 received from Transfer Box ECU.
0xF4 0x00F4 CAN bus fault - No ID.
0xF6 0x00F6 CAN bus fault - No DMER1 received from EMS ECU.
0x8C 0x008C Auxiliary sense incorrect.

Parking Assist Module Fault Reading Complete...

0xE 0x000E Switch LED off

Steering Column Interlock Module Fault Reading Complete...

0x11 0x0011 Magnet driver open circuit or short to ground.
0x1B 0x001B Securing magnet fault.
0x17 0x0017 Locking operation error.
0x45 0x0045 Rotation detection sensor short to battery.
0x47 0x0047 Auxiliary line fault.
0x7 0x0007 Coding checksum error.[\list]




After clearing this is what remained:


Body Control Module Fault Reading Complete...

0x4 0x0004 Auxiliary input fuse defective

Instrument Panel Module Fault Reading Complete...

0xEF 0x00EF No TXU1 received from Transfer Box ECU.
0xF4 0x00F4 CAN bus fault - No ID.
0xF5 0x00F5 CAN bus fault - No ASC1 received from ABS ECU.
0xF6 0x00F6 CAN bus fault - No DMER1 received from EMS ECU.
0x8C 0x008C Auxiliary sense incorrect


Steering Column Interlock Module Fault Reading Complete...

0x45 0x0045 Rotation detection sensor short to battery.
0x47 0x0047 Auxiliary line fault

Anti-Lock Brake System Fault Reading Complete...

0x5A 0x005A Temporary system deactivation

Air Suspension System Fault Reading Complete...

0x32 0x0032 CAN bus Fault

In days of slow speed electirckery, a dim light on when it shouldn't be could indicate a bad earth. Seem to have seen some such points on here. And, yep, there are lots on the FF, may be a place to consider. I've also had numerous faults come up on the IID when my battery began to fail, some having a resemblence to your list.

(coat prepared for leaving ) Cheers
Richard

(there are no such things as an ordinary FullFat, an ordinary cat or too many tools)
2011 TDV8 Vogue Santorini Black
Gap IIDBT

I've checked the ground points in both A pillars, I'm using the wiring diagrams for the X5 3.0D, it's shows its connected to the passenger side A pillar ground connector. There was no corrosion and both the connector and the grounding point were clean.
Currently the issues have gone away, another thing is that the alarm usually goes off whenever it starts playing up so at least I'll have some notice to disconnect the battery.

https://www.newtis.info/tisv2/a/en/e53-x5-3.0d-sav/cIx0EUw

I'll keep you updated

Just checked the codes again with Allcoms
these are the ones remaining, the air suspension code clears as soon as you start driving, the ABS temporary system deactivation has been there for a long time but has no effect on the ABS, the only thing I've noticed is the DSC switch doesn't work.

Body Control Module Fault Reading Complete..
0x4 0x0004 Auxiliary input fuse defective

Instrument Panel Module Fault Reading Complete...

0xBD 0x00BD EBV function fault received from ABS ECU.
0xF4 0x00F4 CAN bus fault - No ID.
0x8C 0x008C Auxiliary sense incorrect

Steering Column Interlock Module Fault Reading Complete...

0x45 0x0045 Rotation detection sensor short to battery.
0x47 0x0047 Auxiliary line fault.
0x7 0x0007 Coding checksum error

I'm going to check it in a little while to see if its still going to sleep

The lights are still illuminated, but in a stobe light fashion, on-off-on. The car does sleep and no lights are on the gear indicator.
No lights on the dash, just the brake lights now

So the brake lights have a signal from the HDC that is independent of the ignition, I'll have a look at voltages at the LCM and get back to you

Q

I think your fault finding is way ahead of mine. I'm following this with interest and would hope you can solve and post the solution.

Good luck Cheers
Richard

(there are no such things as an ordinary FullFat, an ordinary cat or too many tools)
2011 TDV8 Vogue Santorini Black
Gap IIDBT

It’s not by any chance a follow me home function is it? I’ve seen this on my IID where you can specify particular lights to come on for a set time after turning the car off.

They don't have any association with the follow me home lights.
So I removed each fuse one by one and had someone check the lights, Fuse 2 is the culprit.
With it removed, the brake lights are off, the air suspension lights are off and they all function again when the ignition is turned back on. I've tried looking in Rave for a fuse diagram but have had no luck, on the diagram in the car it shows it giving power to

Garage door opener
Heated rear window
Rear blower
Rear seat heating
Trailer socket

I'm going to run allcoms again and get some codes with the fuse out

Have a look at the ABS electrical connector under the bonnet, theses can get furred up and corroded and cause all sorts of apparently unrelated issues. Also the steering lock faults? What is the issue there? Again steering faults tend to daisy chain. And check your LCM for damp/corrosion. .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember
Volvo V70 P2 2006 2.4 Petrol 170bhp Estate SE
MG Midget Mk1 1962

Previous: L322 Range Rover TDV8 3.6 2008; L322 Range Rover TD6 3.0 2002; P38A Range Rover V8 1999

In regards to the steering lock, there are no issues with it and it works absolutely fine.
I've checked the ABS, there was no corrosion on the pins and the lights did not change with it disconnected.
The LCM did have some oxidation inside maybe due to humidity, not damp as the sunroof drains are clear, it was cleaned with contact cleaner, there was no corrosion on the connectors. There are no signs of overheating or any burnt components on the circuit board.
I disconnected the trailer module and reconnected, the brake lights went off. Just waiting to see if it is a permanent fix, I'll try to communicate with the LCM again and see how that goes.