I know this has been done to death here but my wipers on my C5 2011 plate threw a wobbly. They were working one minute and then next time I switched on the ignition they weren't. The car sat for 2 weeks while I contemplated my next move, wipers still not working on numerous attempts. I bit the bullet and bought a second hand master (drivers side), fitted it and all was working again. One evening moved the cars about, wiper working, Came back 5 minutes later, not working. Went out for 3 hours in other car and when I got back tried the wipers and they were working. This scenario has been on going for several weeks, car sits and wipers work, turn off ignition and then they don't, so bit the bullet again and obtained Diagbox.
I run a full global and apart from a couple of codes not concerning the wipers it came back with the FF1A code on wipers, LIN communication fault, not characterised, local location.
Diagbox also could not communicate with the ECU on a second global test, I shut it all down, ran global again, recognised ECU and subsequently didn't on a second test again.
I tried an actuator from the BSI menu and test came back no fault, all be it , the wipers did not work. Ran an actuator test from the wiper ECU menu and it comes back with action not possible. I have 12v at the wiper connections and also some lower signal voltages at the wiper connections.
I have read that Diagbox should be able to determine which unit is faulty but because Diagbox cannot communicate with the wiper ECU I am at a loss whether I have bought another faulty drivers side, is it the passengers side or possibly something else.
I am now contemplating buying a new drivers unit ££££ unless I can come up with any other ideas. I can return the second hand unit for a refund within the next 6 weeks, less a handling fee.
Any advice or insights would be greatly appreciated.
Regards
