EDC16C3 non longer starts

[nblee]

Hi!

I hope you can tell me if I can still try any mechanical remedies, or should I start prying up the ECU and inspecting its firmware. Here's the whole story:

• Got a non-starting Peugeot 206 1.4 HDi year 2002 (multiplexed)
• Previous garage said that ECU is fried
• But they gave me the key without ID46 in the fob (I'm not sure they were aware of that, this story might be full of double-whammys..)
• Got an empty ID46, programmed it to the car (via Lexia, treating the car as Citroen C2, because my PP2000 kept failing to learn the transponder chip)
• With help of brake cleaner started the engine, it starts and runs when warm. I began celebrating (too early)
• Next day struggled to start, but brake cleaner helped
• Scanned faults (see end of message), but get a failure when trying to clear them
• PP2000 says wrong ECU is fitted when I select "8HX/8HZ BOSCH EDC16C3" (VIN VF32A8HXF42592433, but I need to select "8HZ...EURO4" in PP2000 to be happy)
• Intermittent start of the engine sounds like fuel starvation, checked rail pressure during crank (~285, ref: 280)
• Crank/cam shaft sync: yes (although previous garage left another cam sensor in the glovebox, means they tried things..)
• Injector leak-off test was norminal, inspected fuel filter to my best knowledge
• To cross check faults and immo I have fitted an BSI+ECU+ID46 combination from a much newer 206 1.4 HDi (year 2008, EDC16C34)
• Airbag impact fault did not appear in the new ECU+BSI set
• I even swapped just the ECU or only the BSI from the other set just out of curiosity..
• Put back the original ECU+BSI+ID46 set, but the car has never started since
• I then checked the ECU status:

ECU:
Unit control condition: ECU locked
Status of the coded engine immobilizer programming: matched ECU
Problems detected when transmitting the unlock code: awaiting response from BSI

BSI:
Number of keys learned: 1
Transponder code recognised: yes (changes consistent with beep test)
BSI matched: yes
Key in the ignition position: yes
Engine control unit locked: yes

So the ECU is locked, and BSI is failing to unlock it. I'm also getting additional faults in both BSI and ECU that were not there when the car was starting (even if at random):
Multiplexing No communication with the BSI (BSI also says no comms with ECU)

I checked continuity on hi and lo CAM wires between ECU and BSI (following Haynes wiring diagram), and it's fine. Fuse F8 goes live 0.5-1A when ignition on. I also swapped engine fusebox from another car, nothing seemed to help.

I doubt that any other faults should cause a non-start situation, as they were present even during the times when car was starting (albeit intermittently):
P0183 Diesel temperature signal Open circuit or short circuit to +ve
P0313 Clutch switch signal Consistency with vehicle speed
P0483 Engine cooling function integrated into the engine control unit Open circuit or actuator malfunction
P1505 Impact detection Impact information sent by the air bag
P0382 Preheating relay circuit fault. Plugs permanently supplied
P0226 Accelerator pedal signal 2 fault. Consistency with accelerator pedal signal 1
P0221 Accelerator pedal signal 1 fault. Consistency with accelerator pedal signal 2
P0343 Camshaft signal fault. Incorrect signal

Airbag ECU:
P1042 Airbag vehicle speed

There is a chance that there is some cracked solder inside the ECU, it's a pity I forgot to read the immo/ecu lock status when the car used to start..

Please nudge me in the right direction before I start buying ECU prying/flashing kits

[Newmotors]

was the car crashed ?
why the airbag dtc??

[nblee]

Looking at shifted side wings, it looks like the car has been in a minor front end accident.

However how would one explain that I managed to start and run the car with that DTC present.

No airbags deployed, this model year no longer has mechanical inertia switch, and I believe there are no satellites in the side, so e.g. this video hasn't helped my case: https://www.youtube.com/watch?v=glYuxB2zO7E

[Newmotors]

with the dtc p1505 the car does not start and the module is useless!!

[Newmotors]

can you scan the ecu now?
does he run the engine??

[nblee]

can you scan the ecu now?

Yes, I can communicate with both BSI and ECU via PP2000, read codes, change configuration, run BSI actuator tests (but I cannot use wipers, and test cooling fans, probably due to ECU locked)

I cannot clear ECU faults (it says error occurred while clearing faults), but that case was also before.

does he run the engine??

Only the starter is turning, the engine no longer runs, even with brake cleaner.

[Newmotors]

save on immo off to the emprom ST95160

[nblee]

save on immo off to the emprom ST95160

Thank you, I'll try to get the equipment and read the EEPROM. I guess using MPPS over OBD port is the least intrusive method.

Also thanks for pointing out to P1505, but after searching this forum, at least two threads said that engine should still start with that DTC, and their problem was in fact fuel heater: here and here
I'll try to check the fuel heater tomorrow.

But since now there are DTCs indicating no comms between BSI and ECU, I think I'll eventually will have to order the MPPS kit and go down the EEPROM dump route...

[nblee]

But since now there are DTCs indicating no comms between BSI and ECU, I think I'll eventually will have to order the MPPS kit and go down the EEPROM dump route...

Plugged MPPS v16.1.02, tried to read (in slow mode too), and it said "Conditions not correct" (logfile attached). It said the same for a swapped BSI+ECU+ID46 from another 1.4 HDi (with FAP/DPF). Does it mean there's wiring issue somewhere?

More info:
ECU Hawdware type: 1037363558:C18252B :00
Peugeot Hawdware Number : 9647158380
Peugeot Software Number : 9647785780
Bosch Software Number : BOSCH EDC1

MPPS can read ECU just fine on a 2.0 HDi. Hope you can help

[Newmotors]

a tried to leave the ecu with immo off

[Newmotors]

i'm sure your problem is with the immobilizer if i helped leave a thanks

[morgano]

MPPS will not read eeprom, but flash. You need BDM the ecu or maybe get some other tool that can read eeprom in service mode.

Anyway i think you made a mistake by mixing BSi and ECU from different cars, there your real nightmare started. imho

[nblee]

Thank you, I've ordered BDM100 and will read the data on the bench.

The original ECU was already locked even before a swap to other BSI+ECU. What in your opinion could have further poisoned the modules during such swap?

[nblee]

Thanks all, car now starts after your immo off, but has new problems read here: https://www.digital-kaos.co.uk/forum...low-correction