Fault Description: BMW FRM ECU Light Control Module Failure
Fault Codes: The following fault codes may be logged in the FRM ECU:
1. 30BA – FRM: Footwell Module, Internal Fault
2. 30BB – FRM: Footwell Module, Supply Voltage
3. 9315 – FRM: Internal Communication Error
Affected Vehicles and Production Years: The FRM (Footwell Module) ECU is commonly fitted to various BMW models, including, but not limited to:
1. BMW 1 Series (E81, E82, E87, E88) – Production years: 2004-2013
2. BMW 3 Series (E90, E91, E92, E93) – Production years: 2005-2013
3. BMW 5 Series (E60, E61) – Production years: 2003-2010
4. BMW X1 (E84) – Production years: 2009-2015
5. BMW X3 (E83) – Production years: 2004-2010
6. BMW X5 (E70) – Production years: 2006-2013
7. BMW Z4 (E89) – Production years: 2009-2016
Description:
The FRM (Footwell Module) ECU is an essential component in modern BMW vehicles that controls various lighting functions, such as interior and exterior lights, as well as power windows, mirrors, and other related features. It acts as a gateway for communication between different vehicle systems and the lighting control circuitry.
One common fault that can occur with the FRM ECU is a failure in the light control module. This fault can lead to a variety of symptoms, such as malfunctioning lights (interior or exterior), unresponsive power windows, or issues with central locking.
When the FRM ECU detects a fault within its circuitry, it may log one or more of the above-mentioned fault codes to indicate the specific issue. The fault codes “30BA” and “30BB” typically indicate internal faults or supply voltage problems within the FRM module. The “9315” code suggests an internal communication error, which can affect the proper functioning of lighting and other features controlled by the FRM.
Part numbers of affected FRM modules include:
61359390491 / 61359383050 / 61359340339 / 61359308371 / 61359286887 / 61359263803 / 61359249086 / 61359240533 / 61359241008 / 61359230445 / 61359224598 / 61359220137 / 61359204536 / 61359187559 / 61359166708 / 61359159808 / 61359153779 / 61359146058 / 61359128184 / 61356987999 / 61356977724 / 61356961134 / 61356961625 / 61356956587 / 61356955487 / 61356953436 / 61356952837 / 61356950429 / 61353457597 / 61353457588 / 61353457529 / 61353457430 / 61353457404 / 61353457391 / 61353457033 / 61353456988 / 61353456953 / 61353456586 / 61353456393