Hi Badger,
Where is the oneway valve located? Ours has never blocked but the rear takes ages to spray fluid - meanwhile the wiper is rubbing on a dry screen so I suspect the one way valve is not seating.
Ian
Hi Ian.
The one way valve is part of the pipework you can see when you lift the tailgate.
It is the small straight length of pipe that the tubing pushes onto. It should be identifiable as it has an arrow on it to show the direction of flow.
If the link works, it is item 6 in this diagram:
https://www.parts-honda.uk/honda-cars/JAZZ/2016/13-ELEGANCE/ELECTRICAL-EQUIPMENTS-EXHAUST-HEATER/FRONT-WINDSHIELD-WASHER-LH--2-/30745/B152/3/30745On removal I confirmed mine was blocked. I did the usual flushing to no avail, but a soaking in Milton sterilising fluid dissolved the 'gunge' and it worked fine after that - confirmed with the usual mouth blow but better with a bicycle pump.
Whilst that valve was off, I flushed the pipework through by attaching a length of garden hose to drain to ground, then operated the pump to drain and flush the system. The pump was only operated intermittently though with decent intervals between, to not stress the pump or electrics too much.
When refitting the one way valve, I again attached a bicycle pump to the upstream side of the valve and this cleared the 'gunge' in the jet.
One of my symptoms was the same as yours - it took ages for the rear jet to prime. Not good when the MOT is looming. Doing what I've written solved the issue for me.
Hope this makes some sense and also helps.