EDC16C34 FRP problem

[g5n14]

Hello guys!
Have one very interesting car arrived to my shop.
Peugeoet 207 90hp 1.6HDi
Stoped starting, came by towing truck.
Makes strange noises (buzzer type) from Fuel Pressure Regulator which is on high pressure pump.

Errors in ECU - P0658, which is 5v sensor circuit voltage too low.


Checked everything:
Replaced fuel pressure regulator
Checked all the common wiring problem places, all looks good.
Changed ECU
Changed BSI
Disconnected all the components one by one, only while disconnecting the accelerator pedal p0658 is being replaced with some accelerator pedal signal too low.


Fuel Pressure Regulator is supplied after ignition is set to pos.2 with 12V from BSI, and being controlled from ECU by supplying PWM ground through some SOP-8 element, forgot the name already. When I measure signal coming from ECU (ground probe to FRP pin of ECU, V probe to + I get 8 volts while buzzing is present and 6 while trying to start, while should be approx 11-12). As a result 0 fuel comes to injectors. As soon as I supply manually good ground to ground pin of FRP everything is back to normal and fuel is supplied to injectors.


Once again, 2 different ECUs, same problem, so not the ECU 99%, what might be the problem? Once again, disconnected one by one each and every element and buzzing Is present all the time.

P.s. both ecus immo off by PSA EDC16 soft just to make sure.

Thanks to all who are trying to help!

[dehacko]

hello, try julie emulator for immo off
sometimes edc16 is not possible immo off for flash and eeprom ;)

[carmoh]

Hello
did you try to change the engine compartment fuse box (BSM)

[g5n14]

Dehacko

Thanks for your reply. You think immo is using pressure control map to cut start? I thought injector impulses are cuted off. +my FPR is buzzing like you can hear it 3m away from the car, rly loud, don’t think immo would do something like that. And I have a working pair eeprom +bsm, tried like that same shit, made immo off just in case.

[g5n14]

Carmoh

Thanks for reply!
Yeah it’s written in the main post.

[carmoh]

Hello
to my knowledge the immo problem only cuts off the injectors' impulse
I don't think an immo off will solve your problem
in the engine compartment there is a round central socket which connects the injectors opens this connector and checks

[goyodesanctis]

Could you clone ecu by bdm and virgin bsi?

Enviado desde mi Mi A3 mediante Tapatalk

[janusz21]

you disconnected egr

[g5n14]

ECU is cloned. I don’t think virgin bsi is needed because Immo is not curing FRP signal. I have some problem that ECU controls the FRP in a wrong way, there is a poor grounding sent to FRP.

Janusz21, yeah I did, it was the first thing I have disconnected.

[g5n14]

And once again. I don’t think it is immo problem, it is posted in ECU, nor immo nor chiptuning section of a forum. Compared the flash to ori - looks good, both eeproms from both ECU looks good and after that JUST IN CASE, I have done immo off.


The main question: what might cause the ECU to give poor ground (3.5 instead of 0 V) to FRP

[ricked]

maibe stupid remark but did you check ground cable from chassis to motor?

i did replace a lot of these on citroen in the past....

[g5n14]

maibe stupid remark but did you check ground cable from chassis to motor?

i did replace a lot of these on citroen in the past....

Nothing stupid, real problem for all this cars. I run straight ground to ECU to make sure it’s not the problem, forgot to mention.

[g5n14]

Just noticed a very strange thing.
I got the same ECU in my own Focus 1.6, so I have decided to test what’s up there.


All the measurements done by negative probe to FRP pin of ecu and positive probe to bat+12
After ignition on - 11.5 V comes there, so all good.
After ignition off +30sec it drops to 0

So all good, obviously, ford starts easily.


BUUUUT!!! The most interesting part, once i get the ecu off and go to test in table - same shit, 6.5 v once ignition on, so there is some kind of ground cable which should come to support this controlling SOP-8 element, will investigate now which one. If someone has any ideas - please post here. Thanks!

[janusz21]

And the pressure sensor AC disconected

[g5n14]

Yah that was the second one I disconnected 😂

Does anybody know if the car would start without gas pedal or with gas pedal broken?
Because I start to think that pedal is problem and because of safety algos the car doesn’t start.

So new question. What happenes If gas pedal breaks on the go? Car shuts down or goes to idle?

[Meat-Head]

Im conference say should run with gas pedal disconnect

4 wires

do you have a story from customer, what happened how long they owned car for.

ONLY IF EASY check the fuel line not blocked with dk thanks and negative rep points

has any members of an INFERIOR forum looked at it already, when did it last run?

[g5n14]

Im conference say should run with gas pedal disconnect

4 wires

do you have a story from customer, what happened how long they owned car for.

ONLY IF EASY check the fuel line not blocked with dk thanks and negative rep points

has any members of an INFERIOR forum looked at it already, when did it last run?

I will now check ok my Focus if it will change anything.

When i give ground to FRP manually - car works. When ECU gives ground - FRP works only like a buzzer. So no fuel lines here......

Negative rep points because some idiot veteran was Angry for no reason and when you help beginers on a Forum they have nothing to do with increasing your rep, 1 veteran negative = 100 beginer positive. So it is what it is, but i never actuallt let anyone down, always give thanks and rep, so if you are veteran reading this just give me some rep to fix this shit lol 😂

Story from customer: one morning didnt start, another place changed ECU bsi and key bundle and after that came here.

[Meat-Head]

ON TOPIC:-

due to covic 19 cant get correct photo up

does yours have this WITH ELECTRIC CONNECTIONS? Disconnect if has
cycle battery, crank engine THEN read faulty codes

CAUTION ADVERTISEMENT

https://www.ebay.co.uk/itm/PEUGEOT-508-ACTIVE-1-6-HDI-2012-TURBO-INTER-COOLER-AIR-DOWSER-VALVE-9678406580/283461763142? (https://www.ebay.co.uk/itm/PEUGEOT-508-ACTIVE-1-6-HDI-2012-TURBO-INTER-COOLER-AIR-DOWSER-VALVE-9678406580/283461763142?hash=item41ffa34046:g:XZEAAOSw0xtb-ACa)

[g5n14]

ON TOPIC:-

due to covic 19 cant get correct photo up

does yours have this WITH ELECTRIC CONNECTIONS? Disconnect if has
cycle battery, crank engine THEN read faulty codes

CAUTION ADVERTISEMENT

https://www.ebay.co.uk/itm/PEUGEOT-508-ACTIVE-1-6-HDI-2012-TURBO-INTER-COOLER-AIR-DOWSER-VALVE-9678406580/283461763142? (https://www.ebay.co.uk/itm/PEUGEOT-508-ACTIVE-1-6-HDI-2012-TURBO-INTER-COOLER-AIR-DOWSER-VALVE-9678406580/283461763142?hash=item41ffa34046:g:XZEAAOSw0xtb-ACa)


First of all, Thanks for rep, finally after half a year it is fixed!

About what you asked: gives me 2 new faults, which are p2127 and p2124, both about EGR Butterfly valve valve signal faulty.

In general:
It is second freaking day IÂ’m working on it, full day, god damn, donÂ’t remember the last time I met such a hidden shitty problem.
What was done today:
Tried supplying fuel from canister straight to fuel filter to make sure it reaches the pump.
Also pressure tested the fuel filter yesterday, sealed properly no air coming out.
While supplying ground to FPR I have a flow from injector pipes, while ECU is controlling FPR itÂ’s just buzzing like itÂ’s used to. Replaced FPR once again, same stuff.
Tried ECU from my focus, tried some random EDC16C34, tried both of peugeoet ECU, all of them on the table control FPR the same way with same voltages (8.5 and little vibration on FPR because of PWM impulses). But once connected to peugeoet harness FPR is buzzing god damn hard like literally you can hear it 3-5 meters away from the car. Once connected to ford - no buzz whatsoever, maybe a little vibration but without a single buzz. Tried cutting A/C pressure sensor wires from harness, nothing changes, tried cutting 4 wires of accelerator, no result. Tried removing immo off and programming keys OBD by pin, same stuff. In diagnostics BSI - ECU synch ok, transponder recognized, engine start allowed, cam and crank synch ok, engine speed 300+.

3 permanent fault codes:
1) p0658 5v sensors voltage supply
2) p1728 CAN engine torque implausible
3) p0532 Air conditioner pressure signal short to plus


I think it is all connected mostly to p0658 error and maybe p0532 is coming from the same place. For now almost all the wiring harness is naked and I can clearly see the wires. All of the components were disconnected one by one without any result.



Any idea is much appreciated, IÂ’m totally lost from now on, thinking to get engine harness completely out and check every single wire one by one.

[Meat-Head]

Again due to covic 19

A/c because unplug

“torque impossible “. OFF TOPIC p1895 opel zafira auyomatic = airflow meter

”5 volt feed”

1) measures voltages on wires for a/c switch GUESS 2x5v 1xgnd

2) how many wires on airflow meter- is loom melted on engine blick c

sorry slightly malfunction

[g5n14]

Ac fault present when plugged. Not so stupid 😂

1) willl measure tomorrow
2) loom not melted, don’t remember amount of wires but 4 or 5.

[Meat-Head]

If no a/c gas sensor will give neg out

VAUGE MODE ON

Signal
gnd
12v
5v?
temp signal

also map sensor, dpf sensor, dk thanks still stuck

vague mode off

[g5n14]

Spent 12 more hours with the car
After disconecting everything under the hood i started disconneting all other elements on the body. After disconnecting rear left headlight buzzing stopped and car started. Why? Dont ask me i dont want to know, enough for me.

Made a sign in a shop door ”everything except french”

Strangest shit i have ever seen. Hope it helps someone lol.

[Meat-Head]

Now under the fault, would normally hit the :bs: smiley, but its french

opposite to what you expect but makes perfect sense when explaining

GUESS

that plug in that light has got bad earth and send stray signals up the “side light” “break light” wire spiking bsi, causing can command to make ecu think you want it to buzz.

have had similar things with electronics and french

good find, but despite the car only ran other day, will have two faulty things stopping it starting, whats the other fault?

[chiorbeq]

Strange problems,shit cars!Finally solved,that's OK!

[rideon]

Spent 12 more hours with the car
After disconnecting rear left headlight buzzing stopped and car started.


Me confused
That "rear left headlight" contain any LEDs or HIDs ?
Reconnecting said part broke the car again?
Being French doesn't mean you fixed the problem,more likely sh1t fixed by divine intervention

[Meat-Head]

Ah RIDEOFF, nice of you to join the party, but it has ended even the DJ gone