Land Rover B1d1787 «Instant ✭»
The code B1D17-87 on a Land Rover is a specific diagnostic fault indicating a communication failure with the Battery Backed Up Siren (BBUS). This is part of the vehicle's anti-theft alarm system. 🛠️ Fault Overview: B1D17-87
Faulty BMS Sensor: The sensor itself may have failed internally, preventing it from broadcasting data to the vehicle's network. land rover b1d1787
Inspect Connections: Locate the battery-backed sounder (often found in the engine bay or behind the front fender liner). Unplug the connector and check for signs of moisture or corrosion. The code B1D17-87 on a Land Rover is
7. Post-Repair Validation
- Clear all DTCs.
- Cycle ignition OFF, lock vehicle, wait 2 minutes.
- Approach with fob – check driver door unlock via handle grab.
- Lock using driver handle sensor.
- Rescan to confirm B1D1787 does not return.