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BSI CITROEN C4
02-08-2019, 13:32 PM,
Post: #1
BSI CITROEN C4
Hi guys
I have this model  BSI Citroen C4 year 2011 with air conditioning problem(does not send signal to the fuse box motor compartment)
This type of BSI can be cloned with Carprog (good Carprog) or with USB upa (clone)
Or it can be coded with diagnostic machine I have AUTEL MAXISYS MS908S PRO
Thank you


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03-08-2019, 01:04 AM,
Post: #2
RE: BSI CITROEN C4
The MCU is easyCAN4 F1M-32 with internal flash. Cloning will be accomplished by doing both eeprom and flash, I don't think your programmers will handle this MCU ?, for reading flash.

Btw, how did you check that there is no AC command to PFS1 ? What's the engine, THP ?
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05-08-2019, 04:44 AM,
Post: #3
RE: BSI CITROEN C4
(03-08-2019, 01:04 AM)zmann Wrote:  The MCU is easyCAN4 F1M-32 with internal flash. Cloning will be accomplished by doing both eeprom and flash, I don't think your programmers will handle this MCU ?, for reading flash.

Btw, how did you check that there is no AC command to PFS1 ? What's the engine, THP ?

Hi zmann thanks for answering
With what programmer can I read this MCU ???
The car is gasoline 25/10/2011  1.6 G  5FS and the signal works by can between BSI and PFS1 box (We speak only of AC)

I think PSF 1 IS FAILING

Thank you
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05-08-2019, 09:13 AM,
Post: #4
RE: BSI CITROEN C4
Ok, 5FS is VTi engine. This system allows you to listen for AC clutch operating when actuate from BSI, the THP is not.
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05-08-2019, 09:57 AM, (This post was last modified: 05-08-2019, 10:05 AM by barto39.)
Post: #5
RE: BSI CITROEN C4
(05-08-2019, 09:13 AM)zmann Wrote:  Ok, 5FS is VTi engine. This system allows you to listen for AC clutch operating when actuate from BSI, the THP is not.


Hi zmann there is no clutch, it has a valve that is mounted on one side of the compressor 

I check the signal with an oscilloscope and I think it's PSF 1
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05-08-2019, 11:45 AM,
Post: #6
RE: BSI CITROEN C4
(05-08-2019, 09:57 AM)barto39 Wrote:  
(05-08-2019, 09:13 AM)zmann Wrote:  Ok, 5FS is VTi engine. This system allows you to listen for AC clutch operating when actuate from BSI, the THP is not.


Hi zmann there is no clutch, it has a valve that is mounted on one side of the compressor 

I check the signal with an oscilloscope and I think it's PSF 1

Yes, that could be. The AC of this EURO5 may use the same AC compressor as of those THP counterparts. And agree, trying with another PSF1 is more practical than BSI.

edit: missing to answer you, the programmers for that MCU can be FVDI, IO terminal ? I have none neither.
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17-08-2019, 16:20 PM,
Post: #7
RE: BSI CITROEN C4
(05-08-2019, 11:45 AM)zmann Wrote:  
(05-08-2019, 09:57 AM)barto39 Wrote:  
(05-08-2019, 09:13 AM)zmann Wrote:  Ok, 5FS is VTi engine. This system allows you to listen for AC clutch operating when actuate from BSI, the THP is not.


Hi zmann there is no clutch, it has a valve that is mounted on one side of the compressor 

I check the signal with an oscilloscope and I think it's PSF 1

Yes, that could be. The AC of this EURO5 may use the same AC compressor as of those THP counterparts. And agree, trying with another PSF1 is more practical than BSI.

edit: missing to answer you, the programmers for that MCU can be FVDI, IO terminal ? I have none neither.

Hi guys,zmann
Tested with oscilloscope the PSF 1 and does not tint signal to compress valve
Buy a new and running nod nod
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