C5 x7 wipers again

[Danbj]

I have read a lot over the years on here about x7 wiper woes, and have had to replace a master unit before, as my first c5 came to me with this fault. I have recently invested in a diagbox as I didn't want to buy a replacement for the wrong unit. The symptoms are different this time, as I am getting nothing at all from either motor. The code I get is FF1A. Communication issue. Should I assume my problem is likely to be fuse box related? Unfortunately I can't swap relay out. Fuses seem ok. Earth at fusebox is ok. Can anyone help me check that the motors are getting a signal? I don't know what pin does what where the loom enters the motors.
Both units look clean and dry internally. I know this subject comes up a lot so Im hoping someone on here can help me check before I start throwing money away.
Thanks

[GiveMeABreak]

Here's some specific info on that fault.

Happy to pop up a wiring diagram, but I'll need your VIN to ensure correct diagram (please post your VIN in full without spaces - it will be automatically masked from public view after submitting your post & will only be visible to staff).

Fault Code:	FF1A
Description of Fault:	Inter-motor communication fault. Absence of communication between the two windscreen wiper motors for one second.
Conditions for Fault to clear:	Return of communication between the two windscreen wiper motors.
Downgrade Modes whilst Fault is active:	Risk of loss of wipe on just one or on both the windscreen wipers. The wiper on the passenger side is stopped in either the high or the low position, the wiper on the driver side continues within a non-collision zone.
Symptoms:	Only one windscreen wiper is working No windscreen wipe
Suspect Areas:	Windscreen wiper Wires linking the windscreen wiper motors [Master-Slave] Electrical harness between the following two components: Engine fuse box / Windscreen wiper motor (Slave) Electrical harness between the following two components: Engine fuse box / Windscreen wiper motor (Master) Connectors

[Danbj]

Hi marc, firstly can I add my thanks to all the others who have recognised you invaluable contribution to this forum.
My vin is VF7**************[VIN obfuscated, can be read by forum staff].
Since your reply I have swapped out the under bonnet fuse and relay board and replaced it with my son's for test purposes. He is also blessed with an x7. The board has a different no. as his is a nav model but for a wiper test I took a chance. No joy. Still nothing from either motor. Would you suggest I swap out the units (if he will let me). Or are there further checks I can do without the hassle of removing blades, scuttle etc?
Thanks again for your patience and expertise!
Dan

[GiveMeABreak]

Here's the wiring diagram. I've also listed the main equipment and wiring codes for you.

Given that you've temporarily swapped and engine fuse box round with no effect, I think that shows that your issue is going to be with one or more of the motor units. It's all too common behaviour on these.

I suspect your issue will be the internal connections, likely with the Local Interconnect Network (LIN) wiring as these are used to connect the units and if the data communication is garbled or incoherent because of corrosion damage, then it's going to throw a wobbly.

But at least you can see which is which now.



Equipment Codes
5025: Left windscreen wiper motor
5030: Right windscreen wiper motor
5115: Rront/rear wash-wipe pump
5008: Rain/sunlight/tunnel sensor
5110: Cleaning fluid level sensor
PSF1: Engine compartment fusebox panel
BH12: Passenger compartment 12-fuse box /
BSI1: Built-in systems interface
CV00: steering wheel controls

Wiring

9040D: LIN BUS 1
M5025: EARTH m5025
5010: wiper motors intermittence communication
500: Low speed motor command
509: motor control via relay
501: High speed motor command
M5030: EARTH m5030

[Danbj]

Hi Mark, Thanks for the wiring diagram. I have fixed the problem now so thought I would let others know that my problem turned out to be the relay in the fuse panel. I thought I had eliminated this by swapping with a known good one. I am a fool. The car had gone into economy mode, I checked the wipers through drivers window and didn't notice that my test with good fuse panel was foiled by not starting the car. Lesson learnt! At least I worked it out before spending a fortune. Thanks for your help.
Dan.

[GiveMeABreak]

No worries and thanks for the update Dan.

[dragokC5]

I do not pretend to repair by myself, however I try to understand as much as possible the wiper system mess before deciding what to do.
The left motor has been changed long ago (by Citro shop) resulting in increased trouble. Since it concerned only the high speed wiping I preferred to leave it, till, after years, situation gradually deteriorated, ending in full halt. Suspects go to BSI, BSM, etc...
My question is to have the right circuit. The circuit above does not correspond to my case where two pins of the connector go to earth (no.s 2 and 4).
My car is a 163 Hp diesel sedan automatic gear LHD C5 of August 2012.
The Valeo wiper motors correspond to designations 53569612, 6405LC (driver side - left) and 53569512, 6405KZ (passenger - right).
The VIN: VF7**************[VIN obfuscated, can be read by forum staff]

[darbuck]

The wiper motors are known to fail on the C5 x7.you need to plug in the car to find out what codes it's throwing up.you will need a diagbox session.The wipers have individual ECU which works in a slave master arrangement. Driver side being the master.

[dragokC5]

If it were so straightforward they wouldn't have replaced a good motor (billing the diagnosys too). With the electric scheme hints might be found.

[hicko76]

I appear to be suffering from this dreaded problem. Cannot believe how expensive these motors are either. Just in case I fall under the recall catchment I will add my VIN VF7**************[VIN obfuscated, can be read by forum staff].
If someone could check that for me or tell me the correct way to request a check, I would be very grateful.
Thanks
Steve

[GiveMeABreak]

Sorry you're well out of the recall problem - it was corrected by this build date. This is general wear or most likely water ingress.

[hicko76]

Ah right, thanks for the quick reply Marc. Fortunately a mate has a decent diag box and I've just read an OF1A code. LIN between the 2 motors fault. I'm sure you know the solutions off the top of your head before I trawl the conversations. If you don't mind please?

[hicko76]

No need Marc, there is plenty of info that I've found now. Sorry for being lazy there.

[hicko76]

Hi Marc
I have gotten pretty overwhelmed with the amount of information on this issue and I'm not 100% sure on the parts I need for my 2011 C5 exclusive. Some sellers claim the motors are the same for 2008 - 2018 and I don't want to delay my repairs by buying the wrong part
My vin again is VF7**************[VIN obfuscated, can be read by forum staff].
Would the part numbers
53571012 or 9683767280 and
53570912 or 9683767480 be suitable for my car?
Big thanks in advance
Steve

[Romicans]

Hi,
I'm wondering if anyone knows if the wiper motors are the same on left hand drive and right hand drive cars? I have a left hand drive C5 X7 2008 and my right wiper motor is broken, the one with the best price on eBay is from a right hand drive, will it fit or do I need to get one from a left hand drive?

Rolf