J317 is part of the onboard power supply control unit (AKA vehicle electrical system control unit). It is rare that this unit fails, but when it does it can cause all kinds of grief.

It looks like this

is this the convience unit? do you think this needs to be replaced , what sort of job is it?

is this the convience unit? do you think this needs to be replaced , what sort of job is it?

No, it's not the convenience unit, but the two do work closely together.

The first things I would check are the connectors and the ground connections.

Check fuse F34 and that the brown 6-pin connector is plugged in securely

ok will do are you talking about the convience unit or the control unit , i have a bbox above the throttle pedal that looks like that is that the convience or control unit many thanks

ok will do are you talking about the convience unit or the control unit , i have a bbox above the throttle pedal that looks like that is that the convience or control unit many thanks

The convenience unit is a small black box (100x75x30) with a single 23-pin connector.

The OBPSU is a largish black box (250x250x40) with 10+ connectors. There are a number of 6-pin connectors. One of these is brown and is connected internally to J317.

Check all the connections, including any wires that go to ground and any that are secured by nuts around the relay plate.

It's also worth double checking all the battery connections

The convenience unit is a small black box (100x75x30) with a single 23-pin connector.

The OBPSU is a largish black box (250x250x40) with 10+ connectors. There are a number of 6-pin connectors. One of these is brown and is connected internally to J317.

Check all the connections, including any wires that go to ground and any that are secured by nuts around the relay plate.

It's also worth double checking all the battery connections

OK do you know where abouts the convience unit is located, also what is the job of the OBPSU (whats it stand for) , also where is the relay plate , is this the plastic holder with the 4 relays in mentioned as i cant seem to find any grounds on it

OK do you know where abouts the convience unit is located, also what is the job of the OBPSU (whats it stand for) , also where is the relay plate , is this the plastic holder with the 4 relays in mentioned as i cant seem to find any grounds on it

The convenience unit is on a bracket above the clutch pedal.

OBPSU = onboard power supply control unit (AKA vehicle electrical system control unit). This unit houses all the electronics that handle inputs from switches, etc, and outputs to other modules, warning lights, etc.

eg.

XS1 (black 6-pin)

T6c/1 Input of light switch (for headlight washer system pump)

T6c/2 Input of illumination regulator - switches and instruments (58b)

T6c/3 Output for warning lamp + hazard warning light button illumination

T6c/4 Input of buttons for heated rear window (31)

T6c/5 Output for heated rear window warning lamp

T6c/6 Input of buttons for warning light (31)

The above example give you an idea of what it does

The earth connections in the loom are easy to spot as all of the wires going to the connections will be brown.

The convenience unit is on a bracket above the clutch pedal.

OBPSU = onboard power supply control unit (AKA vehicle electrical system control unit). This unit houses all the electronics that handle inputs from switches, etc, and outputs to other modules, warning lights, etc.

eg.

XS1 (black 6-pin)

T6c/1 Input of light switch (for headlight washer system pump)

T6c/2 Input of illumination regulator - switches and instruments (58b)

T6c/3 Output for warning lamp + hazard warning light button illumination

T6c/4 Input of buttons for heated rear window (31)

T6c/5 Output for heated rear window warning lamp

T6c/6 Input of buttons for warning light (31)

The above example give you an idea of what it does

The earth connections in the loom are easy to spot as all of the wires going to the connections will be brown.

Ok is the control unit programed to the car, as i have a just a standard pd100 fabia 2001 on the road at the moment would i be able to swop these over to see if windows work after of course ive checked all the connections , do you think this is the likely cause of the problems could it still be convience unit, anyway i will get back to you tonight with the results of the plug checks and earth checks

Ok is the control unit programed to the car, as i have a just a standard pd100 fabia 2001 on the road at the moment would i be able to swop these over to see if windows work after of course ive checked all the connections , do you think this is the likely cause of the problems could it still be convience unit, anyway i will get back to you tonight with the results of the plug checks and earth checks

There is no programming for the OBPSU. There are different versions but they are all interchangeable. The older version may have slightly different functionality but it should be OK for testing. If you give me the part numbers for the two units, I will be able to check if your test will be conclusive. The same units can be found on cars across the VAG range.

The convenience unit is different. You can get the part numbers by doing a scan on each car. The functionality of these unit is always changing and are programmed.

Right ok had a look last night , pulled out the power supply box , cleaned connectors, cleaned battery connectors and all other connectors that inter join above the battery box and still the windows are the same, have to pull the window fuse and push back in again for windows to work or disconnect reconnect battery up untill you lock the car then they dont work again . No problems are showing up on VCDS-LITE for the conveince unit just the same old on for the engine

18009 - Relay for Supply Voltage Terminal 30 (J317): Implausible Signal

P1601 - 35-00

any ideas left, i really do appreciate all the help you hav been giving me thanks learnt a lot so far,

????

thing is really giving me the run around , rear lights not working now after unluging and pluging back the electrical control back in windows still the same,

question is would it be ok to try another convience unit in the car would it be that just the central locking via the key wont work or will the car not start, untill i get this programmed?

My first move would be to swap the power supply box, clear the fault and see if it comes back with a different unit. Given that you have a reported fault you should get rid of that first.

VCDS should give you the part number for convenience unit on each car. Many of the convenience units are not compatible.

right i have managed to get hold of 2nd hand convience unit and powersupply box

if i plug the convience unit in am i right in thinking every thing should work and run except the central via the blip or button on the key??

right i have managed to get hold of 2nd hand convience unit and powersupply box

if i plug the convience unit in am i right in thinking every thing should work and run except the central via the blip or button on the key??

Do you have the part codes for the old and new items.

The convenience unit needs to have the same part number including the letter(s) at the end of the code.

The power supply box needs to have the same code or the same code with F as the letter.

Replace the power supply box first. Clear the code and check it doesn't come back.

You should disconnect the battery to change the power supply box. After you connect the battery, turn the key in the driver door and turn it in the lock position as far as it will turn. Hold for 3 seconds and release. Repeat.

If you are lucky the windows will now work. My guess it is the fault in the power supply box that is screwing up your windows.

If this doesn't fix the windows, then change the convenience controller. Before you do, write down the coding for the old unit from VCDS.

If you get stuck then send me a PM.

right changed control unit and no change , so changed the conveince unit and still no change still same old fault , 18009 what the hell is this , im stuck dont know what to do next some forums mention relay 109 needs changing for this error code but there is no relay 109 in the fabia vrs

When we picked up the wife's New Fabia Vrs( MK II) the front windows didn't work at all so I put the key in the drivers door and turned the key and held it in the unlock position as if to unlock the car and the windows went down, turned the key in the lock as to lock the car, hold the key in that position and the windows went back up. The windows now work with the buttons on the inside of the doors.

This method resets the windows. Don't know if it works on the Mk I Vrs but worth a try

right changed control unit and no change , so changed the conveince unit and still no change still same old fault , 18009 what the hell is this , im stuck dont know what to do next some forums mention relay 109 needs changing for this error code but there is no relay 109 in the fabia vrs

There is no relay 109 (ECU power relay) on the relay plate. There is an ECU power relay that is part of the power supply control unit, but that problem should be fixed as you replaced it with a new OBPSU. Need to go back to the diagrams.

Right this has finally been solved it was the plug in module on the top of the drivers side motor at fault changed control unit and all worked properly a massive thanks to

rwbaldwin

he was a massive help and cant thank him anough and big thanks to all others that helped hopfully this will get someone else out of trouble !!

Just been reading this, it sounds very similar if not the same as my problem.

Any pics of the control unit?(so i know what i am looking at).

 

Cheers.

 

Right this has finally been solved it was the plug in module on the top of the drivers side motor at fault changed control unit and all worked properly a massive thanks to

rwbaldwin

he was a massive help and cant thank him anough and big thanks to all others that helped hopfully this will get someone else out of trouble !!

On 17/03/2011 at 13:28, Deano123 said:

Right this has finally been solved it was the plug in module on the top of the drivers side motor at fault changed control unit and all worked properly a massive thanks to

rwbaldwin

he was a massive help and cant thank him anough and big thanks to all others that helped hopfully this will get someone else out of trouble !!

 

I know this is an old (very) thread, but I intrigued to find exactly what you did to sort your problem out. I've replaced my window motor with a known working motor/module and it works intermittently as yours was. am I right in thinking the motor/module ive replaced is also faulty?