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Peugeot 406 Coupe faulty ECU?

Posted By general Monday, June 03, 2019 2:05:23 AM
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general
 Posted Monday, June 03, 2019 2:05:23 AM
Saturday Job

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Hello all,

I was repairing my car and of course I removed accumulator. After connecting it back I am having problems with my ECU.

It shows a lot of faults. Can't really know where to start with diagnostics here. Electrician said that is possible that fuse box was faulty.

Got a new one, to try it out, but the problem remain.

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K And R
 Posted Monday, June 03, 2019 3:41:54 AM
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General

hmm. Who,s using the planet ? Clown or genuine ?

Kev.


"If you dont KNOW how it works, don,t try to test or fix it"
general
 Posted Monday, June 03, 2019 4:13:18 AM
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I suppose something in between BigGrin

Was trying to find this supply control relay, but without any luck :/
CYRIL (T)
 Posted Monday, June 03, 2019 4:31:22 AM
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Make a note of all the faults then try to clear them.then read it again to see if thd faults are still there or gone intermittantDont for Petes sake start ripping things apart yet.
At a guess the battery was disconnected and the Bsi had not gone to sleep.or you have some problem with battery leads.
Do a global and see if there are any outher faults or better still if you are not in he trade take it to someone that undetstands it. Also post the vin number so know which 406 we are dealing with


Regards

Cyril

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Monday, June 03, 2019 4:38:00 AM by CYRIL (T)
general
 Posted Monday, June 03, 2019 5:27:20 AM
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I tried to clear them, but no one of these get cleared. About the BSI, I have followed the procedure of disconnecting the accumulator.

The history of the BSI is, that last time that mechanics disconnected the battery the same thing happened with BSI. It lost all the functions. The same happened now, even that I followed the procedure. After that I called this electrician that repaired BSI with some Bosch diagnostics tool. And when he came now the second time his verdict was that Fuse box can be faulty... This is why I replaced it, but with no luck apparently.

I am trying to repair what I know. Have some knowledge in electronics and software, but of course not so familiar with all the electronics in the car.

VIN: VF38C3FZA81472688
K And R
 Posted Monday, June 03, 2019 6:23:19 AM
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General

So you have the planet ? And the guy with bosch kit has done some-thing in the past with his bosch kit you could not with planet ?

I would follow Cyril,s advice OR get a good diagnostic guy in before you waste more time and money.

Think carefully about what work you did and what could have gone wrong with that work.

Kev.


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general
 Posted Monday, June 03, 2019 7:10:22 AM
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Yea, I have the Planet. The other guy said that he had to tell BSI what it is (whatever this means) or that BSI lost all the data... I didn't ask any other questions about that. But don't know what has BSI to do with ECU? And yea, he said that for BSI is not normal that is losing all the data when is without power. And I can confirm that few years ago when accumulator was changed, this didn't happen (that BSI would lose all the data).
K And R
 Posted Monday, June 03, 2019 10:40:30 AM
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General

"But don't know what has BSI to do with ECU?" well seeing that the BSI powers up the ECU a lot. If the ECU and BSI can,t shake hands the engine won,t start.


So does the engine start ? no mention either way so far !!


Kev.


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general
 Posted Monday, June 03, 2019 1:58:05 PM
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No engine does not start, because BSI has immobilizer isue, can't recognize the key. I will call the electrician again, he can get BSI running again. Then from there on we can continue with diagnostics. But yea, ECU and BSI have shaked hands and recognized each other.
CYRIL (T)
 Posted Tuesday, June 04, 2019 4:34:00 AM
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That would have help earlier.behind the cowlings around the steering column where keys go in the ignition.This you will have to remove
Is a Black riñg with I think 4 wires coming from it fits over the Ignition switch.
This is the aerial for the transponder. If this is faulty it will not recognise the key or unlock the Imobilizer
or the Ecu


Regards

Cyril

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Tuesday, June 04, 2019 4:37:52 AM by CYRIL (T)

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