Land Rover LR4 5.0 2012 No start / No Ignition

**munkss** · 13th June, 2022, 08:04 PM

Hello, so i've had the car sitting in a warm garage for about 1 month and yesterday when i was going to start it i got no response from the start button. I also noticed that the instrument cluster is all black and the ac unit is also dark. The mid touch screen works and the central locking works.

I checked the battery and it should have enough voltage to start the car, But i put the car with a charger over night and also tried jumping with another running car but no difference.

I only managed to read codes in bcm because i can't turn on the ignition to read the rest. I had lots of codes first scan but most where able to be deleted.

Anyone have experience with these cars and what i should check for?

Thanks in advance.

**pawl** · 13th June, 2022, 08:29 PM

good fuses?

**munkss** · 13th June, 2022, 08:46 PM

I've checked every fuse under the hood, and some on the bcm, fuse for instrument etc, all looked good.

**pawl** · 13th June, 2022, 09:13 PM

check the relay of the main ignition circuits in the k79-1 engine compartment box and the k79-2 passenger compartment I only have the discovery 5.0 diagram,

**munkss** · 14th June, 2022, 01:46 AM

Hmm not really sure which relays you're talking about. But i on the bcm there is only relay and it seems like it works fine, And i checked the power going to it showing only 9.1-9.2 volt not sure if this is normal. Battery showing 11.9.

**fuzz1** · 14th June, 2022, 03:33 AM

Hi
Why don't you change the battery? Does the remote work to open and close the car? Are the ground terminals corroded? The ones bolted to the car

**munkss** · 7th August, 2022, 03:29 PM

Originally Posted by fuzz1

Hi
Why don't you change the battery? Does the remote work to open and close the car? Are the ground terminals corroded? The ones bolted to the car

Late response, but yeah i swapped battery still same thing. The remote works fine on all doors. The radio also works, But the dash and AC is dark, Except when i lock the car i see the red lock flashing on dash so i know dash have power.
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**munkss** · 10th August, 2022, 11:08 PM

I suspect there might be some canbus issure.

If i measure at the obd im only getting 0.8 volt when car is "sleeping" and if i press the fob it jumps to 1.2 volt on both can low + can high. If i measure resistance between high and low im getting 61ohm so that seems fine.

**IanBMW** · 11th August, 2022, 11:02 AM

Screenshot (9).jpg check wiring loom near top air suspension for rubbing

**munkss** · 16th August, 2022, 01:59 AM

Originally Posted by IanBMW

Screenshot (9).jpg check wiring loom near top air suspension for rubbing

Thanks for your suggestion, i checked this and the main ground next to it but both looked fine. I still have a couple of modules i can try pulling to see if the car wakes up.