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Repairing FRM & FRM2 2nd Generation if a short circuit occur
30-07-2015, 01:01 AM,
Post: #1
XZBMW  Repairing FRM & FRM2 2nd Generation if a short circuit occur
Repairing FRM & FRM2 2nd Generation if a short circuit occur

   
Note:

The lighting functions, part of the closing functions as well as power window and mirror functions are integrated in the footwell module.

A total of 4 short circuit faults can be stored in the control unit.
Designation:
If a short circuit is detected in a circuit, the circuit is switched off after one minute. This circuit remains switched off until there has been a terminal change (terminal 15 > terminal 30 > terminal 15).
A renewed attempt to switch on is only made after a terminal change.
After a total of 50 terminal changes have occurred in a vehicle while one circuit has a short circuit, the corresponding output from the footwell module is switched off permanently. This is the case if the fault entry can no longer be deleted even though the short circuit has been repaired.
In this case, the footwell module must be replaced.
Note: A short circuit can also be entered during poor ground connection to the bulb holder. If no short circuit is found during repair, the contacts and ground connections must also be checked.

FRM2 2nd Generation if a short circuit occur


Dealing with short circuits in the footwell module depends on the production date of the footwell module. Differences result for the production date 09/2007 and 09/2009.
Description of dealing with short circuits up to 09/2007:
If a short circuit is detected in a circuit, the circuit is switched off after one minute. This circuit remains switched off until there has been a terminal change (terminal 15 > terminal 30 ‐> terminal 15).
A renewed attempt to switch on is only made after a terminal change. After a total of 50 terminal changes have occurred in a vehicle while the circuit had a short circuit, the corresponding output from the footwell module will be switched off permanently. This is the case if the fault entry can no longer be deleted even though the short circuit has been repaired. Exception: xenon bulbs: If the short circuit was present in the circuit of a xenon bulb, the output will be switched off permanently after 20 terminal changes. In this case, the footwell module must be replaced.
Description of dealing with short circuits as of 09/2007:
If a short circuit is detected in a circuit, the circuit is switched off after one minute. This circuit remains switched off until there has been a terminal change (terminal 15 > terminal 30 ‐> terminal 15).
A renewed attempt to switch on is only made after a terminal change. The control unit permanently switches off the corresponding output if a total of 10 terminal changes have taken place while there is a short circuit in a circuit. After repairing the short circuit, the output is reactivated using a diagnosis command in the testing procedure.
If the short circuit is still present, the output will be switched off again after 1 minute and permanently switched off again after another 10 terminal changes. Exception: xenon bulbs: If the short circuit is still present in the circuit of a xenon bulb, the output will be switched off again after 1 minute and permanently switched off again after another 4 terminal changes.
An output can be reactivated 5 times by a diagnosis command in the testing procedure. The footwell module permanently switches off the corresponding output if a total of 60 terminal changes have taken place while there is a short circuit in the circuit. Exception: xenon lamps: A xenon output can be reactivated 5 times by a diagnosis command in the testing procedure. The footwell module permanently switches off the corresponding output if a total of 24 terminal changes have taken place while there is a short circuit in the circuit.
The output cannot be reactivated, even with the diagnostic command, and the fault entry can no longer be deleted. In this case, the footwell module must be replaced.
Description of dealing with short circuits as of 09/2009:
If a short circuit is detected in a circuit, the circuit is switched off after ten seconds. This circuit remains switched off until there has been a terminal change (terminal 15 > terminal 30 ‐> terminal 15).
A renewed attempt to switch on is only made after a terminal change. The control unit permanently switches off the corresponding output if a total of 10 terminal changes have taken place while there is a short circuit in a circuit. After repairing the short circuit, the output is reactivated using a diagnosis command in the testing procedure.
If the short circuit is still present, the output will be switched off again after 10 seconds and permanently switched off again after another 10 terminal changes. Exception: xenon bulbs: If the short circuit is still present in the circuit of a xenon bulb, the output will be switched off again after 10 seconds and permanently switched off again after another 4 terminal changes.
An output can be reactivated 5 times by a diagnosis command in the testing procedure. The footwell module permanently switches off the corresponding output if a total of 60 terminal changes have taken place while there is a short circuit in the circuit. Exception: xenon lamps: A xenon output can be reactivated 5 times by a diagnosis command in the testing procedure. The footwell module permanently switches off the corresponding output if a total of 24 terminal changes have taken place while there is a short circuit in the circuit.
The output cannot be reactivated, even with the diagnostic command, and the fault entry can no longer be deleted. In this case, the footwell module must be replaced.
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[+] 6 users say Thank You to Yhwsha for this post
30-07-2015, 06:12 AM,
Post: #2
XZBMW  RE: Repairing FRM & FRM2 2nd Generation if a short circuit occur
Thanks for this (official BMW) info.
Unfortunately it is not correct pertaining the information to "Description of dealing with short circuits up to 09/2007"

On FRM1 it is also possible to reset short circuit/blocked output, the FRM does NOT need to be replaced (contrary to what's written here and what BMW dealerships tell customers)
To reset use tool32:
*load FRM87.prg (for FRM1)
*execute job STATUS_LAMPEN_KURZSCHLUSS_COUNTER
this will show a result window, outputs with counter >=50 are blocked

To reset blocked output:
*execute job "_reset_kurzschluss_sperre" with as argument the hex value of the blocked output.
Use the Table Info window to find this value for the affected output.

The output will now function again and the corresponding light should work.

Done this several times on E9x FRM1's.
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[+] 11 users say Thank You to johnno for this post
13-01-2017, 20:07 PM, (This post was last modified: 13-01-2017, 20:09 PM by teerak2uk.)
Post: #3
RE: Repairing FRM & FRM2 2nd Generation if a short circuit occur
How do you tell if its FRM1 or 2 or 3 etc because I can't clear these faults

[Image: 77515b49ab740f49871f52ccf8887e0c.jpg]
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14-01-2017, 23:52 PM, (This post was last modified: 15-01-2017, 00:20 AM by Fx82.)
Post: #4
RE: Repairing FRM & FRM2 2nd Generation if a short circuit occur
Check if the program is capable of showing the details of a module.

MGU virgin and patching in Europa.
Secure coding 2.0
Feature installer codes
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[+] 2 users say Thank You to Fx82 for this post
15-01-2017, 00:06 AM,
Post: #5
RE: Repairing FRM & FRM2 2nd Generation if a short circuit occur
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