Thread: Discovery 3 electrical gremlins

Hi all,

I know these posts circulate most forms (as I've tried to read through most) however like most, realise there is some slight iteration which does not specifically apply to mine but if this has been mentioned prior please forgive!

I own a 2008 Discovery 3 HS which I've had for about 6 months which has plagued me with reliability issues (should have hadthe vehicle inspected before purchase I know). Anyways, I do love the Disco with my parents owning one when they first came out and never seemed to have any issues which is why I took the plunge although its been a love/hate relationship to say the least.

Current issue I am having is to do with the suspension.. I think. Ever since I went for 3-hour drive to the Otway’s national park the Disco has developed a suspension/transmission warning issue. The three amigos will appear with the standard transmission/park brake fault, I switch the car off and back on and everything will clear. I'm not sure if maybe the twists and turns of the National Park has done something to the leveling sensors however did recall the back left not sitting aligned with the rest ofthe wheels. On the 3-hour drive back it only faulted twice however now that I'mback in Melbourne it seems to be faulting much more frequently i.e. once every 20 minute drive.

When the faults appear, I pull over as the car begins to lower to access height and turn off. I then turn the car back on and it appears the car has selected off-road height on the selector however not on the cluster. I have to then raise the vehicle into off-road height and then lower it back to normal drive height and then drive off.

I purchased a code reader and have the below current faults

Fault	Description
U0132	Lost communication with ride level control module
P0000	NO DTC DESCRIPTION
U0101	Lost communication with transmission control module
U0100	Lost communication with engine control module/powertrain control module
U0402	Invalid data received from transmission control module
U0416	Invalid data received from vehicle dynamics control module
U0421	Invalid data received from ride level control module
U0401	Invalid data received from engine control module/powertrain control module
U0155	Lost communication with instrument cluster control module
C1A96	Brake light switch circuit
P0504	Brake switch a/b correlation

Note: - I have already changed the brake switch.
- Air compressor can sometime be heard for 30 seconds when starting
- No sagging is apparent when leaving the car for multiple days

I know this is a long-winded story which has been posted various times over however with all the money I've already sunken into this car I need to diagnose these problems myself is possible. I'm not expecting a silver bullet fix but any suggestions, troubleshooting or similar experiences would be greatly appreciated!

My inexperienced theory is something to do with the levelling sensors.

IMG-3032.jpg

Cheers
Conah

Sorry also forgot to mention the battery has been replaced as I've seen on the threads they are very sensitive to voltage fluctuations