The anti-theft will not disarm?

TYSONSTALLER

MEMBER
2021 LAND ROVER DISCOVERY 2
4.0L
V8
4WD
AUTOMATIC
170,000 MILES

The anti-theft won't disarm causing the motor to crank no start. We have tried all the reset suggestions from land Rover and other web pages. Not getting power to fuel injector or fuel pump or coil, no fire no spark.

Friday, August 26th, 2022 AT 3:08 PM

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
43,033 POSTS

It sounds like the main relay stopped working but we should check the fuses #1, #2 #13 and #12 first. Here is a guide to help and the location of the main relay just in case. Check the fuses with the key on, engine not running.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Also, you can try a hard reboot which is done by removing the negative side of the battery, with the cable loose from the negative side of the battery, hold it to the positive terminal for 1 minute this will discharge the memory capacitors in the BCM and PCM allowing the system to reboot.

Check out this guide as well:

https://www.2carpros.com/articles/how-to-reset-a-security-system

Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.

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