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Old 24-07-19, 08:18 PM   #1
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Default Major problem, It throws "every" fault code there is

My wifes 407 started to play up today.
Its an 2004 407 saloon 2,2l 24V petrol

Reading of fault codes I get:
From the BSI F99C (Petrol pump actuator Circuit"
from the Engine Control (MM6LP)
I get 13 codes:
P0105 Most likely the MAP sensor, changed it today.
P0445 Evaporative Emission System Purge Control Valve Circuit Shorted
P0261 Injector 1 – circuit low
P0264 Injector 2 – circuit low
P0267 Injector 3 – circuit low
P0270 Injector 4 – circuit low
P0076 Intake Valve Control Solenoid Circuit Low Bank 1
P0135 O2 Sensor Heater Circuit Bank 1 Sensor 1
P0141 O2 Sensor Heater Circuit Bank 1 Sensor 2
P0351 Ignition coil A, primary/secondary – circuit malfunction
P0353 Ignition coil C, primary/secondary – circuit malfunction
P0354 Ignition coil D, primary/secondary – circuit malfunction
P0352 Ignition coil B, primary/secondary – circuit malfunction

Som of the other boxes reports U1208 and U1108, most likely CAN-bus Errors.

So, anyone that have an Idea what the heck is going on?
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Old 24-07-19, 09:25 PM   #2
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Hmm, well...

How are the battery and the alternator?

Are they described as permenant or intermittent?
Will any of them not clear?
When you have cleared them which come back first?
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Old 24-07-19, 09:30 PM   #3
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Battery or wiring issues is most likely reason after that underbonnet fusebox.
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Old 24-07-19, 09:42 PM   #4
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They did clear, then I started the Engine, left it on idle for half an hour, then it suddenly stopped with the fuel pump error.
That error did not clear, however the Engine started after a while.
Mind you it is quite hot today, might be the cause ( not the cause actually, but speeding up the true cause a bit)

Will investigate more tomorrow.
Also found a couple of threads with a similar issue, seeems to be the fusebox (BSI) relay that was the cause. Not necesseraly the same cause for me though.
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Old 24-07-19, 09:45 PM   #5
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I think you may well find it is the same cause i have seen the same thing on a few 407s they seem to be more prone to it for some reason.

Its not the BSI though its the BSM different thing entirely thats why i say under bonnet fusebox.
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Old 24-07-19, 09:54 PM   #6
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Sorry, meant the BSM, typoo from my side.
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Old 25-07-19, 07:22 AM   #7
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Had a similar problem

https://www.peugeotforums.com/forums...-start-338610/

https://www.aussiefrogs.com/forum/pe...dnt-start.html
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Old 25-07-19, 07:55 AM   #8
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Yes, I found those threads, gave me a hint.
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Old 25-07-19, 11:23 AM   #9
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Today, the car died after som 15 minutes, connected Diagbox, diagbox said that the Engine ECU was unknown type, 10 minutes lateer the car started, no diagnostic codes present, except CAN bus errors
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Old 30-07-19, 10:35 PM   #10
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So, obvious the fault is in the BSM, since it appears that relay 2 is not pulling.

Ordered an "New" bsm from a scrapyard, unfortunatly, it has the same behaviour or fault.
So I decided to take the BSM appart.
I managed to carefully take the back off, with a saw.
Now, obviously it would not be that simple, since there is a piggy-back PCB on the relay/fuse pcb.
That PCB needs to be removed.
There is some 89 solderpoints that needs to be unsoldered, a proper de-soldering station is absolutly necessary , do not try it without it.

Personally i use a Weller desoldering station with built in vaccum pump.
Similar to an WRS1001 ( cannot attach more images, sorry, you have to google it)
Still one have to be very carefull in order to avoid damage on the PCB.

Removing the relay, the you need at least a 200W soldering pen, Start with applying solder flux (proper one for Electronics), then resolder with new solder, to increase the wetting, the I use a desoldering pump, and some desoldering braid. (and a lot of proper flux), desolder with care.

Now I removed the relay, dont think it actually was necessary, unfortunatly it was a destructive removal, thanks to the Silicon filler.
The relay looked quit okay on the Contacts, however, the coil could still be affected.

I am planning to replace it with a standard car-relay, as an middle Control relay and put two fused relays for the actual load.

There is obviously quite a lot of load on this relay, Petrol pump, Injectors, ignition, heaters for the oxygen sensors, and various other heaters, such as crank case ventilation heater etc.

If the repair succeds, I will repair the other faulty BSM, so I have one as spare


Here some images:
First Image: The CPU-card that needs to be removed.
Second Image: The relay/fuse pcb
Third Image: The culprit, heat afffected soldering joint
Forth image: Relay removed.
Fifth image: Relay removed
Attached Thumbnails
wp_20190730_21_41_04_pro.jpg   wp_20190730_21_41_11_pro.jpg   wp_20190730_21_41_49_pro.jpg   wp_20190730_22_38_45_pro.jpg   wp_20190730_22_38_26_pro.jpg  

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