Non Starter - Ecu errors

[encran]

Hi Guys, I am new to the forum. Great job its very well organised.
My problem is with a 1999 1.1 206
There was no work recently conducted on the vehicle and had been running fine, then all of a sudden it was a non starter. Car turns over but will not start. There is no voltage to the fuel pump, and fuses are all okay. Inertia switch is not tripped. All grounds are good.
When connected to diagnosis there are 2 ecu engine management related faults they are:
Intermittent communication failure
Permanent communication failure

I am hoping this is not going to be an ECU rebuild job, but if it is is there anyone here that would have knowledge of common failures with the Magneti Marelli IAW 1AP.80 engine management system?
Or if this is a common wiring fault were is the best place to look, I have already checked the connection under the air box and into the back of the fusebox and of course the dual function relay under the ECU, plugs and sockets.

Any help would be GREATLY appreciated guys, thanks in advance

[GrandadMonkey]

Found this:

It relates to a 1.4 but the problem was a broken wire between the fuse box and the ecu.

Have a read, there are 5 pages of it.

http://www.bba-reman.com/forums/topic96186-1-1.aspx

Any help?

[encran]

Been tooling this out all day and stripped out all wiring back from ECU and DF relay back to fuseboard for completeness. Surprisingly all wiring was in greats condidtion, tested all okay refitted and tested to be sure still all okay. Retested, still no start and no comms with ecu (only coms to bsi) Tested for power from dual function relay getting 7.5v
Will Dismantle the ECU tomorrow and start testing out all the SMC's, IGBT's and the two mosfets. A circuit schematic of the ecu and pinouts would have been great but alas I cant find these anywere

[GrandadMonkey]

I'm sorry my link was of no help.

Good luck with your fault finding.

[encran]

After been working on this all day and found numerous issues both with the BSI and the ECU. Will post pictures if the issues if you would like in case others need to use them. However I do have a question for you regards wiring. In the haynes manual for the MM1AP injection system wiring there is a cable 8270 from pin 13 of the ECU that goes to pin 12 of the dual function relay with a splice to wires 821 822 to BSI pins 22 and 21 respectivley, and 821 to to pin 48 of ECU. Do you know if this wiring illustrated is correct? As I have different. I have the following connections:
ECU pin 13 > DFR pin 12 and BSI pin 21
ECU pin 48 > BSI pin 22 (but not connected to spice above as illustrated)

Is this the possible cause for lost comms to ECU or a misprint in the haynes? I have emialed haynes but have not heard back. Will trace the cabling tomorrow (urg...) If you have exp with this vehicle you may know were this 8270 cable spice is and save me ripping our half the loom to find it.
Have a look at the schematic and let me know what you think.

http://www.freeweb.hu/hmod/peugeot/peug ... s_rajz.pdf

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[GrandadMonkey]

Sorry, way beyond the scope of my experience,

Good luck.

[encran]

For those of you trying to resolve wiring issues and whom are following the Haynes MM1AP injection system schematic, the spice mentioned in my previous post is indeed incorrect. This splice is on the original peugeot schematics but has been rectified since to show the correct wiring (illustrated in previous post by red dots on wiring schematic snippet).

Got the car running today finally but was an involved process which needed me to cannablise parts from a old 206 ECU. On the plus side I now have a breakout box for the DFR and ECU connections.

I hope this thread is usefull to some of you.

[davehegehog]

Hi I have the exact same model Peugeot, and this has happened, although I havent run diagnostics. I dont know that much about the car ecu and electrics. Anything you can think of that can help me please.