Land Rover B109c15 Extra Quality | Pro

Clear all DTCs. Perform the “window motor initialization” procedure (hold switch up for 10 seconds after full close, then down for 10 seconds). Cycle the ignition off for 60 seconds. Drive the vehicle over rough terrain (or use a shaker table if in a shop). Rescan after 50 miles. B109C15 should be .

The front puddle lights or interior courtesy lights fail to turn on. Intermittent Operation:

: Check for water ingress near the BCM (often located under the passenger seat or behind the glovebox depending on the model) which can cause spurious electrical codes. land rover b109c15 extra quality

In Land Rover diagnostics, the fault code typically points to an issue with the front interior light or front courtesy lamps . The "-15" sub-code specifically indicates a short circuit to the battery or an open circuit .

B 1 0 9 C 1 5 ┬ ┬ └──┬──┘ └──┬──┘ │ │ │ └─ Failure Type Byte (15 = Circuit Open or Short to Battery) │ │ └─ Core Component Identifier (Air Distribution / Blend Actuator Circuit) │ └─ 1 = Manufacturer Specific Code (Land Rover / Range Rover) └─ B = Body System Category (HVAC, Lighting, Airbags, Comfort) Clear all DTCs

[Vehicle Model/Year] – Diagnostic Code B109C-15: Front Courtesy Lamps Issue Vehicle Details: Model: (e.g., Discovery 4, Range Rover L405 Year: (e.g., 2016) Engine/Trim: (e.g., 3.0L TDV6) The Problem:

Measure the resistance of the actuator motor to determine if the sensor is permanently shorted or open. Fixing the B109C15 "Short to Battery" Issue Drive the vehicle over rough terrain (or use

For Land Rover owners and specialized technicians, dealing with complex Diagnostic Trouble Codes (DTCs) is a familiar part of maintaining these sophisticated vehicles. One code that frequently causes confusion due to its cryptic phrasing in certain aftermarket scan tools—often appended with descriptions like "Extra Quality" or "Circuit Short to Battery"—is .

Clear all DTCs. Perform the “window motor initialization” procedure (hold switch up for 10 seconds after full close, then down for 10 seconds). Cycle the ignition off for 60 seconds. Drive the vehicle over rough terrain (or use a shaker table if in a shop). Rescan after 50 miles. B109C15 should be .

The front puddle lights or interior courtesy lights fail to turn on. Intermittent Operation:

: Check for water ingress near the BCM (often located under the passenger seat or behind the glovebox depending on the model) which can cause spurious electrical codes.

In Land Rover diagnostics, the fault code typically points to an issue with the front interior light or front courtesy lamps . The "-15" sub-code specifically indicates a short circuit to the battery or an open circuit .

B 1 0 9 C 1 5 ┬ ┬ └──┬──┘ └──┬──┘ │ │ │ └─ Failure Type Byte (15 = Circuit Open or Short to Battery) │ │ └─ Core Component Identifier (Air Distribution / Blend Actuator Circuit) │ └─ 1 = Manufacturer Specific Code (Land Rover / Range Rover) └─ B = Body System Category (HVAC, Lighting, Airbags, Comfort)

[Vehicle Model/Year] – Diagnostic Code B109C-15: Front Courtesy Lamps Issue Vehicle Details: Model: (e.g., Discovery 4, Range Rover L405 Year: (e.g., 2016) Engine/Trim: (e.g., 3.0L TDV6) The Problem:

Measure the resistance of the actuator motor to determine if the sensor is permanently shorted or open. Fixing the B109C15 "Short to Battery" Issue

For Land Rover owners and specialized technicians, dealing with complex Diagnostic Trouble Codes (DTCs) is a familiar part of maintaining these sophisticated vehicles. One code that frequently causes confusion due to its cryptic phrasing in certain aftermarket scan tools—often appended with descriptions like "Extra Quality" or "Circuit Short to Battery"—is .