BMW FRM MODULE REPAIR

Repair service for a bmw footwell  module  (FRM3) that is unresponsive to Diagnostic tools.  The main reason why a FRM3 module goes into this condition is due to the low and or unstable voltage supply. There may well be other causes for module failure including during unsuccessful software updates and coding. A failed FRM3 will result in the software being corrupted, usually blocking any further communication between the FRM3 and a OBD diagnostic. The FRM3 module must be removed in order to fix the corrupt software which will allow the normal operation of the FRM3 module, and enable all the functions to work again. Vehicle programming data that is lost when the module crashes can be restored to original operational status and recoded to your vehicle. (This means coding is included in the repair service, for free!) All you need to do is send the broken FRM3 module & the VIN number of your vehicle and I will return the ready to plug & play unit. You will receive your restored module which will be specifically coded to your vehicle without you having to physically present your vehicle! The repair & return of the module is normally over night. So next day would be dispatched. 
In most cases the FRM3 modules failure is repairable, however we need to test the module to what is the real problem.
Just in case light module is not fixable we can advise or supply the replacement one with the coding to the car at the end.

Failure of FRM module

  1. Power windows failure
  2. Lights stopped working or permanently in ON positon
  3. Electric wings mirror stopped working
  4. Indicators not working
  5. No diagnostic communication to the module 
FRM Repair Form
 

Bmw Footwell module description

System functions

  • The following functions are executed by the footwell module:

  • Gateway between LIN bus and K‐CAN

  • Waking by means of various signals

  • Storing vehicle order

 

Other functions

Gateway between LIN bus and K‐CAN

The footwell module (FRM) enables communication to take place between the LIN bus and the K‐CAN.

The footwell module transfers the messages to the relevant recipient bus.

Components on the LIN bus:

  • Special equipment exterior mirrors

  • Switch block in driver's door, High variant

  • 2 stepper motor controllers for the adaptive headlight stepper motors

  • 2 belt feeder controllers (only E92)

Walking by means of various of signals

The footwell module (FRM) can be wakened via the following signals:

  • K-CAN active

  • Terminal 15 ON

  • Hazard-warning switch ON

  • Change in status of door contacts

  • Anti-theft alarm system triggered

Storing vehicle order

The vehicle order is stored in the footwell module (FRM). For the order to be stored, terminal 15 must be ON and the vehicle must be travelling at a road speed of less than 5 km/h.

The vehicle order enables the vehicle to be identified. Besides the type code number, the vehicle order contains all important equipment features on the vehicle.

Other functions

The footwell module (FRM) influences various functions in the vehicle. The following components are controlled by the footwell module:

  • Exterior mirrors

  • Exterior lighting

  • Interior lighting

  • Central locking system

  • Power window regulator

 

Exterior mirrors

There are 2 versions of the switch block in the driver's door:

Switch block in the driver's door, basic variant

The switch block sends its signals directly to the footwell module (FRM).

Switch block in driver's door, High variant

The switch block is connected to the LIN bus. The requests to adjust the mirror are sent via the LIN bus. The footwell module (FRM) receives and processes the signals via the LIN bus. Every 20 milliseconds, the footwell module queries whether there are requests from the switch block. In the Sleep mode, the power supply is switched off. The outside mirrors cannot be actuated. The mirror heating is controlled by the footwell module. The corresponding information is forwarded to the evaluation electronics in the mirror via the LIN bus.

If a mirror memory is installed, the footwell module saves the memory position of the mirrors. [more ...]

 

Exterior Lights

The lighting function are integrated in the footwell module (FRM). These lighting function are:
  • Parking lamps

  • High-beam headlight

  • Headlamp flasher

  • Turn indicator

  • Hazard warning flashers

  • Brake light

  • Low-beam headlights

  • Reversing lights

  • Fog lights

  • Rear fog light

  • Parking lamps

Besides the lighting functions, other exterior lighting functions are also integrated in the footwell module:
  • Lighting system monitoring

  • Headlamp range control

  • Emergency operating mode if the footwell module fails

  • Lamp replacement

    (important lighting functions are substituted by other lights being actuated in the event of individual lights failing.)

  • "Follow-me-home" lighting

  • Visual alarm after anti-theft alarm has been triggered

    (the visual alarm is given as per encoding with hazard warning lights, turn signals with dipped headlights or turn signals with main-beam headlights.)

  • Actuation of bi-xenon headlamps

  • Activation of the step motor controller for the adaptive headlights

  • Cornering light

    The cornering light is coupled to the Adaptive Headlight.

 

All lighting functions except the additional brake light are supplied with a pulse-modulated signal by the footwell module (FRM). This PWM signal enables a uniform brightness of the exterior lights.

Interior lights

On vehicles without roof function centre (FZD), the footwell module actuates the interior lighting in the roof area directly.

All footwell module outputs for interior lighting are pulse-width modulated. This ensures that the interior lighting maintains constant brightness despite voltage fluctuations.

With standard equipment, the interior lighting comprises the following components:

  • Front interior light

  • Luggage compartment lights

  • Glove compartment lighting

  • Footwell lighting

The following components can also be installed as special equipment for the interior lights:

  • Rear interior light

  • Ground lights

Central locking system

The footwell module evaluates the status of the Hall effect sensors in the door contacts.

When the vehicle is locked or unlocked with the mechanical key element, the footwell module will recognise this request. The footwell module transmits a message on the K‐CAN to the CAS (Comfort Access System):

[for more information, please refer to SI Technology (SBT) 61 01 04 072]

Power window regulator 

The footwell module (FRM) and the junction box electronics (JBE) control the power window drives.

The relays for the front power windows motors are located in the footwell module. The relays for the rear power window drives are fitted in the junction box electronics.

[more ...]

Switch on condition

The footwell module (FRM) receives a large number of input signals that switch on the interior lighting. The input signals are directly read into the footwell module or are received via the K‐CAN.

The following signals switch the interior lighting ON:

  • Interior lighting button pressed

  • Door opened

  • Unlocking the driver's door with the door lock

  • Unlocking using remote control

  • Terminal R OFF, if terminal 58g was ON no more than 2 minutes earlier

  • Crash signal present

  • Lock button on remote control pressed when central locking system has been in central double-locking for at least 10 seconds

The interior lighting is switched off under the following preconditions:

  • Central locking system set to thiefproof mode, all doors and the tailgate closed

  • Interior lighting button pressed for longer than 3 seconds

  • Terminal 58g ON and terminal R OFF

  • Terminal R ON with doors closed

  • The vehicle is unlocked with the remote control and no door is opened with the space of 20 seconds

  • Terminal R OFF and a car door left open for longer than 1 minute

  • Via diagnosis ”Power Down”

  • 8 minutes after terminal R OFF

FRM hardware available parts numbers

3455163 A E , 3455576 3 E , 3455818 4 E , 3455896 4 E , 3455616 A E , 3456051 4 E , 3455707A E , 3456073A E , 3456248A E , 3456395A E , 34564098 E , 34565887 E , 34564149 E , 34568237 E , 3456848A E , 3456952A E , 3456987A F , 3457031A F , 3457158A F , 3457389A F , 3457402A F , 3457428A F , 3457480A F , 3457499A F , 3457527A F , 3457486A F , 3457521A F , 3457563A F , 3457573A F , 3457586A F , 3457592A F , 3457596A F , 6827072A F ;
3455162 A E , 3455575 3 E , 3455817 4 E , 3455895 4 E , 3455615 A E , 3456034 4 E , 3455706A E , 3456074A E , 3456249A E , 3456394A E , 34564108 E , 34565877 E , 34564139 E , 34568227 E , 3456847A E , 3456951A E , 3456986A F , 3457012A F , 3457029A F , 3457156A F , 3457387A F , 3457400A F , 3457426A F , 3457478A F , 3457497A F , 3457525A F , 3457484A F , 3457519A F , 3457561A F , 3457571A F , 3457584A F , 3457591A F , 3457595A F ;
9215666 A G , 9220137 A G , 9221442 A G , 9224598 A G , 9223946 A G , 9227149 A G , 9230445A G , 9241008A G , 9240533A G , 9244241A G , 9249086A G , 9253537A G , 9263803A G , 9269828A G , 9281080A G , 9286887A E , 9295033A E , 9308371A F , 9340339A E , 9383050A E , 9390491A E , 6827064A F ;
9215667 A G , 9220138 A G , 9221443 A G , 9224599 A G , 9223947 A G , 9227148 A G , 9230444A G , 9240534A G , 9244242A G , 9249087A G , 9251497A G , 9253538A G , 9263804A G , 9269830A E , 9308364A F , 9340331A E , 9383042A E , 9390483A E , 6827065A F ;
3454178 A E , 3455705 A E , 3456072 A E , 3456247 A E , 3456393 A E , 3456408 8 E , 34565867 E , 34564159 E , 3456824A E , 3456849A E , 3456953A E , 3456988A F , 3457033A F , 3457160A F , 3457391A F , 3457404A F , 3457430A F , 3457482A F , 3457501A F , 3457529A F , 3457488A F , 3457523A F , 3457565A F , 3457575A F , 3457588A F , 3457593A F , 3457597A F , 6827073A F ;
9206240 A G , 9209003 A G , 9215659 A G , 9220130 A G , 9221435 A G , 9224591 A G , 9223939A G , 9227156A G , 9230452A G , 9240526A G , 9244234A G , 9249079A G , 9251489A G , 9253530A G , 9263796A G , 9269817A E , 9308363A F , 9340330A E , 9383041A E , 9390482A F ;
9206242 A G , 9209005 A G , 9215661 A G , 9220132 A G , 9221437 A G , 9224593 A G , 9223941A G , 9227154A G , 9230450A G , 9241003A G , 9240528A G , 9244236A G , 9249081A G , 9253532A G , 9263798A G , 9269819A G , 9281075A G , 9286882A E , 9295029A E , 9308366A F , 9340334A E , 9383045A E , 9390486A F ;
9206238 A G , 9209001 A G , 9215657 A G , 9220128 A G , 9221433 A G , 9224589 A G , 9223937A G , 9227158A G , 9230454A G , 9240524A G , 9244232A G , 9249077A G , 9251487A G , 9253528A G , 9263794A G , 9269815A E , 9308361A F , 9340328A E , 9383039A E , 9390480A F ;
3457032 A F , 3457159 A F , 3457390 A F , 3457403 A F , 3457429 A E , 3457423 A F , 3457481A F , 3457500A F , 3457528A F , 3457487A F , 3457522A F , 3457564A F , 3457574A F , 3457587A F , 9813864A F , 9813878A F , 6827070A F ;
3457030 A F , 3457157 A F , 3457388 A F , 3457401 A F , 3457427 A E , 3457421 A F , 3457479A F , 3457498A F , 3457526A F , 3457485A F , 3457520A F , 3457562A F , 3457572A F , 3457585A F , 9813863A F , 9813877A F ;
3457034 A F , 3457161 A F , 3457392 A F , 3457405 A F , 3457431 A E , 3457425 A F , 3457483A F , 3457502A F , 3457530A F , 3457489A F , 3457524A F , 3457566A F , 3457576A F , 3457589A F , 9813865A F , 9813879A F , 6827071A F ;
9206231 A G , 9210712 A G , 9215651 A G , 9220151 A G , 9221450 A G , 9224616 A G , 9223958A G , 9227135A G , 9230431A G , 9240544A G , 9242521A G , 9244227A G , 9249072A G , 9253396A G , 9263789A G , 9277783A G , 9269838A G , 9284426A G , 9286152A G , 9287249A E , 9308372A E , 9342894A E , 6801291A F ;
9206233 A G , 9210714 A G , 9215653 A G , 9220153 A G , 9221452 A G , 9224618 A G , 9223960A G , 9227137A G , 9230433A G , 9240546A G , 9242523A G , 9244229A G , 9249074A G , 9253398A G , 9263791A G , 9277785A G , 9269840A G , 9284428A G , 9286154A G , 9287251A E , 9308374A E , 9342896A F , 6801293A F ;
9206232 A G , 9210713 A G , 9215652 A G , 9220152 A G , 9221451 A G , 9224617 A G , 9223959A G , 9227136A G , 9230432A G , 9240545A G , 9242522A G , 9244228A G , 9249073A G , 9253397A G , 9263790A G , 9277784A G , 9269839A G , 9284427A G , 9286153A G , 9287250A E , 9308373A E , 9342895A F , 6801292A F ;
9206234 A G , 9210715 A G , 9215654 A G , 9220154 A G , 9221453 A G , 9224619 A G , 9223961A G , 9227138A G , 9230434A G , 9240547A G , 9242524A G , 9244230A G , 9249075A G , 9253399A G , 9263792A G , 9277786A G , 9269841A G , 9284429A G , 9286155A G , 9287252A E , 9308375A E , 9342897A F , 6801294A E , 6827063A F ;
9340333 A E , 9383044 A E , 9390485 A F ;
9206241 A G , 9209004 A G , 9215660 A G , 9220131 A G , 9221436 A G , 9224592 A G , 9223940A G , 9227155A G , 9230451A G , 9241002A G , 9240527A G , 9244235A G , 9249080A G , 9253531A G , 9263797A G , 9269818A G , 9281074A G , 9286881A E , 9295027A E , 9308365A F , 9340332A E , 9383043A E , 9390484A F ;
9206237 A G , 9209000 A G , 9215656 A G , 9220127 A G , 9221432 A G , 9224588 A G , 9223936A G , 9227159A G , 9230455A G , 9240523A G , 9244231A G , 9249076A G , 9251486A G , 9253527A G , 9263793A G , 9269810A E , 9308360A F , 9340327A E , 9383038A E , 9390479A F ;
9206244 A G , 9209007 A G , 9215663 A G , 9216422 A G , 9220134 A G , 9221251 A G , 9221439A G , 9221444A G , 9224595A G , 9224600A G , 9224606A G , 9223943A G , 9223954A G , 9223948A G , 9227141A G , 9227152A G , 9227147A G , 9230437A E , 9230448A G , 9230443A G , 9241005A G , 9241016A E , 9241010A G , 9240530A G , 9240541A E , 9240535A G , 9244238A G , 9244243A G , 9249083A G , 9249088A G , 9253534A G , 9253539A G , 9263800A G , 9263805A E , 9269822A G , 9269832A G , 9281077A G , 9281083A G , 9286889A E , 9286884A E , 9295034A E , 9295030A E , 9308368A F , 9340336A E , 9383047A E , 9390488A F ;
9206246 A G , 9209009 A G , 9215665 A G , 9216567 A G , 9220136 A G , 9221255 A G , 9221441A G , 9221448A G , 9224597A G , 9224608A G , 9224604A G , 9223956A G , 9223945A G , 9223952A G , 9227139A G , 9227150A G , 9227143A G , 9230435A E , 9230446A G , 9230439A G , 9241018A E , 9241007A G , 9241014A G , 9240532A G , 9240543A E , 9240539A G , 9244240A G , 9244247A G , 9249092A G , 9249085A G , 9253543A G , 9253536A G , 9263809A E , 9263802A G , 9269836A G , 9269826A G , 9281087A G , 9281079A G , 9286893A E , 9286886A E , 9295038A E , 9295032A E , 9308370A F , 9340338A E , 9383049A E , 9390490A F ;
9206245 A G , 9209008 A G , 9216424 A G , 9215664 A G , 9221253 A G , 9220135 A G , 9221446A G , 9221440A G , 9224602A G , 9224607A G , 9224596A G , 9223950A G , 9223944A G , 9223955A G , 9227145A G , 9227151A G , 9227140A G , 9230441A G , 9230447A G , 9230436A E , 9241012A G , 9241006A G , 9241017A E , 9240537A G , 9240531A G , 9240542A E , 9244245A G , 9244239A G , 9249090A G , 9249084A G , 9253541A G , 9253535A G , 9263807A E , 9263801A G , 9269834A G , 9269824A G , 9281085A G , 9281078A G , 9286891A E , 9286885A E , 9295036A E , 9295031A E , 9308369A F , 9340337A E , 9383048A E , 9390489A F ;
9206239 A G , 9209002 A G , 9215658 A G , 9220129 A G , 9221434 A G , 9224590 A G , 9223938A G , 9227157A G , 9230453A G , 9240525A G , 9244233A G , 9249078A G , 9251488A G , 9253529A G , 9263795A G , 9269816A E , 9308362A F , 9340329A E , 9383040A E , 9390481A F ;
9206243 A G , 9209006 A G , 9215662 A G , 9220133 A G , 9221438 A G , 9224594 A G , 9223942A G , 9227153A G , 9230449A G , 9241004A G , 9240529A G , 9244237A G , 9249082A G , 9253533A G , 9263799A G , 9269820A G , 9281076A G , 9286883A E , 9295028A E , 9308367A F , 9340335A E , 9383046A E , 9390487A F ;

Example of FRM software repair

Footwell module repair

Intermittent fault on the FRM3 module from  Mini R56 - lights stays on all the time one window on the driver side not working.

After replacement faulty processor 3M25J everything back to normal. Software update and the new coding at the end as well

Footwell module quick fix

Bmw FRM update and coding

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