Land Rover - B109c15 Extra Quality Hot!

Modern Land Rovers use a LIN bus (Local Interconnect Network) to control blower motor speed. The B109C15 code often points to a short to battery in the blower motor control circuit. The transistor inside the blower motor resistor pack fails, causing the fan to go into “self-destruct mode” (full speed).

Land Rovers are notorious for throwing unrelated electrical codes if the battery voltage is low. land rover b109c15 extra quality

Performance and mechanical upgrades

Has anyone found a common "rub point" in the door wiring harness that causes this short? Modern Land Rovers use a LIN bus (Local