Hi
I have changed the motor because the arm had lost its attachment to the motor. 
I can activate the washer and motor with VCDS. Not with the lever/switch.
No fault codes. 
Took out the switch but couldnt see anything wrong in the board on it.
Opened the Onboard power supply control unit when I had it in my hand - nothing obviously wrong there either. 
My question is - other people out there who have had same problem and solved it?
The switch is very simple, so wonder what could go wrong with it?

16 hours ago, Orchid70 said:

Opened the Onboard power supply control unit

Do you mean the steering column electronics control unit? That's what the wiper switches seem to (only) connect into.

Checked out the measuring blocks....
This is really strange.
There is still no fault codes - but I can see in the measuring blocks that the lever i operated.... but the rear wiper motor nor washer operates - only when I operate it with VCDS.

 

24 minutes ago, Wino said:

Do you mean the steering column electronics control unit? That's what the wiper switches seem to (only) connect into.

Yes, I mean the unit under the steering wheel. 

It looks like the signals from the switches get processed OK by the steering column ECU; but the relays that operate the wipers and washers are in the Onboard Supply control unit (J519/module 09).

 

When you're successfully activating the functions with VCDS,  is that via output tests in J519/module 09? Or are you achieving that via module 16?

 

Wondering if J519 is getting the correct info, but something else is inhibiting it from carrying out the outputs?

 

Has the coding/adaptations of any unit been altered recently, or any battery changes/power interruptions?

 

 

 

 

Question 1: In module 09
Shoud I test in Module 16 also?

Question 2:
I do not know. Battery is not a original.

Thank you!!

Just now, Orchid70 said:

Shoud I test in Module 16 also?

I don't know what is available in there, doubtful that it will have output tests that are physically/electronically carried out by another module, but not sure.

 

If the coding for either module had accidentally got changed to 'no rear wiper fitted' that might explain things.

 

No - checked the coding too - its correct at 00034:
 

I dont know if this looks correct - Long coding for Central Electric module:
 

You're well into @langers2k territory with that last screengrab, I have no idea about long coding.

Me neigther =) 
Ill try to contact him/her and ask.
The caar owner is picking up her car soon, so I will have try tyo figure this out later, anyhow. 
Thanks for you ideas!! Always nicer when you are not alone in, trying to resolve things =) 

If the measuring blocks show the switch is working and the output tests let you activate the washer, it feels like everything should work...

 

I think the rear wiper coding is in byte 21, yours looks to be 6D which seems sensible enough - assuming I can count

 

The only thing that springs to mind is a dodgy boot switch or something like that...

The rear boot is shown closed......
This is making me MAD!

No idea I'm afraid.

 

The wiring for the rear wiper is pretty simple and the washer pump is the one for the front wash but used in reverse. It'll be similar to this (maybe different colours depending on year):

 

Not sure what signals the BCM uses to control the wiper/washer but maybe take a look with a multimeter when you do the output test and when you the wiper stalk?

 

Do you have any other faults?

- I think you've replaced the ignition switch?

- Did the rear licence plate lights error get cleared?

- What about 00323 - Vehicle Inclination Sensor (G384) ?

- Yes the ignition switch is changed and the fault codes gone.

- Lacense plate fault was present only because I had had the wires disconnected - so those are gone as well

- 00323 - Vehicle Inclination Sensor (G384) is for the alarm - thats still there, after every central locking of the doors - not otherwise and the lever doesnt work no matter if the faultcode is present or not. 

Looking at the wiring diagram for it - perhaps its the fuse, Ill check it out when she comes back tomorrow. Fuse SC35.

Yes - thats correct wiring, and yes sooo very simple. 
The only place we cannot follow the signalwires - is inside the steering column module J519. 
What about the "long coding"? I dont even know what that is for?

The wires from the stalk/switch go to the steering wheel control unit.

 

The steering wheel control module will then send a CAN message to the BCM asking it to activate the rear wiper.

 

The long coding helper will help explain the long coding

 

Just for fun, I'd try disconnecting the main battery for a while to see if that helps reset things...

I did that when I changed ignition switch.... It took about half an hour.
Would it be an idea to disconnect both connections to the starter battery and attach them together? To reset BCM.
I clicked on the Long Coding Helper but didnt understand more... =P 

I will try to reset the BCM by removing the fuse number 3 in fuce box SB, in engine compartment. 

I remeber a Renault C4 from 2014 acting up with the drivers side window. The control unit was integrated with the window motor. After I have pulled off the connector and attached it again during my search for the root of the problem - everything worked as it should again. 

SB3 is only one of several permanent power feeds to the BCM, so may not be sufficient to achieve anything reset-like.

Which engine does your car have?

 

Engine code:
CCSA

Perhaps take off all the connectors from it would do it?

Unplugging the three BCM connectors is pretty simple and that should reset it...

 

But as you've had the battery out, I'm not super hopeful it'll help 

True...
Really strange this is. 
Would the plus and minus battery connector trick, do anything with the BCM?

Doubtful, that just speeds up the natural discharging of capacitors, which probably takes very little time after first terminal comes off battery anyway.

It could be a broken wire in the tailgate boot?

 

 

 

Trev

1 hour ago, Aston_Bodger said:

It could be a broken wire in the tailgate boot?

 

 

 

Trev

 

No, I have checked  - and I wouldnt be able to activate with computer (VCDS) if there was.