Discovery 3 CAN Bus NIGHTMARE!
Amazon link to NOCO GENIUS 10 : https://amzn.to/4brSuI3 Electrical tester used: https://amzn.to/4uvCOw6 Is your Land Rover Discovery 3 completely dead with an immobiliser fault? In this video, I track down a "permanent" electrical failure that almost sent this Disco to the scrapyard. From Nanocom diagnostics to tracing a broken CAN bus wire, here is how I got it running again. The Land Rover Discovery 3 (L319) is famous for electrical gremlins, but a total immobiliser lockout is the ultimate nightmare. After swapping the ECU, BCM (Body Control Module), and Instrument Cluster (clocks) with no luck, I realized the issue wasn't the modules—it was the wiring. In this video, we cover: Nanocom Evolution Updates: How to handle mismatched VINs. CAN Bus Troubleshooting: Diagnosing a break in the Medium Speed (MS) CAN bus network. Immobiliser Reset: Why the car wouldn't read the key and how the BCM "wakes up." Wiring Repair: Tracing the fault through the bulkhead to the fuel-burning heater splice. Key Programming: Using the Nanocom for Land Rover key learning and transponder syncing. If your Discovery 3 or LR3 has flashing hazard lights, an unresponsive dash, or won't crank, this CAN bus wiring fix might be the solution you're looking for! 00:00 Intro: Can this scrapped Discovery 3 be saved? 01:36 Updating the Nanocom: Dealing with mismatched VINs and modules 03:30 Troubleshooting common Discovery 3 immobilizer & BCM issues 07:33 Discovery 3 Fuse Box Diagram & Ignition Switch power feed 08:07 CAN bus Diagnostics: Testing resistance between BCM and OBD port 11:14 Identifying Medium Speed CAN bus network faults (Yellow/Blue wire) 12:03 Reading Land Rover Wiring Diagrams: Understanding connectors & split joints 15:05 Chasing the CAN bus signal to the Climate Control & TPMS 19:03 FIRST START: Hearing the Discovery 3 engine run! 20:41 Bypassing the faulty wire behind the dashboard 21:36 First test drive (and discovering suspension & traction control issues) 22:37 Programming a new Discovery 3 key with Nanocom 25:16 Summary: How one tiny wire scrapped a whole car 26:04 Using a NOCO Genius 10 as a 12V power supply
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