Airbag light on: Internal control-unit fault - replacement modules s0180 error

[Cruicka]

After water penetration I got the dreaded red airbag light on.

Insta+ reported "93D7 ACSM: Internal control-unit fault".

After installing an identical replacement Insta+ reported "S0180 No communication possible with: Safety module/ restraint system".

Assuming the replacement module was faulty, I installed another identical one , only to have Insta+ report "S0180 No communication possible with: Safety module/ restraint system" again.

I reinstalled the original module and Insta+ reported "93D7 ACSM: Internal control-unit fault".

So, another replacement sourced and installed only for Insta+ to report "S0180 No communication possible with: Safety module/ restraint system" again!

I find it hard to believe that I have received 3x replacement control units each with the same fault, albeit provided by the supplier, however by re-installing the original unit and re-confirming the original fault that is what the evidence implies.

Anybody had this experience or any ideas what could be going on?

 

[t-tony]

I can only think that you have to get the "new" module coded to your car.

Tony.

 

[Cruicka]

I can only think that you have to get the "new" module coded to your car.

Tony.

Agreed, just need to get it to communicate first.

 

[colb]

I feel your pain, had a look at another members project car the other day that has the airbag light on. Scan with bmw scanner revealed the dreaded F0 code internal fault control unit plus both belt tensioners and the occupancy sensor codes. It won’t allow any codes to be cleared. The current module is a replacement for what was in the car when he got it, same part number he ditched the original so that’s lost. However he has another module same part number going to fit that and scan that one, will have to check if it’s going to need coding to the car when we next plug it in. Meanwhile he will be cracking on with his sill refurb and fitting the new otters. From my research the F0 code locks the module up and would need specialist attention to repair and reset, have been looking at crash data.co.uk who do this for circa £70. Will see what the second replacement performs before sending one away for repair and reset.

 

[NZ00Z3]

Here is some information on the MRSZ3 issue: https://www.bimmerforums.com/forum/...40-errors)-Finally-found-a-fix!&highlight=240

Earlier in the week I came across a snippet about the MRSZ4 that is used in the later model Z3's. The owner was able to run it through the coding process and clear the F0 fault.

 

[shameshame1]

Here is some information on the MRSZ3 issue: https://www.bimmerforums.com/forum/...40-errors)-Finally-found-a-fix!&highlight=240

Earlier in the week I came across a snippet about the MRSZ4 that is used in the later model Z3's. The owner was able to run it through the coding process and clear the F0 fault.

Hi there, apologies for bringing up an old thread but I think this deserves a follow-up. I've ordered an X-Prog and I'm ready to pull the ABG module and read the EEPROM. The factor is that my car is a 9/2001 manufacture date which should have the MRSZ4 module. Was wondering if you perhaps knew where that snippet of a success with the MRSZ4 module could be found? Appreciate any input.

 

[NZ00Z3]

Didn't book mark it, so it's long gone.

 

[shameshame1]

All good. I misread the manufacture date, it's actually 9/2000 so I have the MRSZ3 module. All my fretting about nothing because I wasn't paying close attention.