I have a 2005 997 Carrera S. The headlamp washers have stopped working. The fuse is intact. The dedicated headlight washer pump functions when tested by connecting it directly to a power source. I swapped the relay with a known good relay and also tested the operating switch on the wiper control stalk. I have also established that the headlight washers do not work with every tenth windscreen wash. So other than an unlikely wire break it is looking increasingly like a software issue.
Despite extensive internet searching I have only found one reference to a similar problem and that was on the rennlist forum where a helpful owner had responded to a poster with '....I had non-fuctioning headlamp washers and heated seats at the same time. The solution was a handover(sic) reset on PIWIS.'
I am not sure whether that poster meant a 'hard reset on PIWIS' if he/she didn't then what is a 'handover reset'?
I do not have heated seats.
I have an iCarsoft i960 OBD reader and having spent some time trawling through all the options it offers and it shows me things like the values for the intermittent wiper delay values and other values for various of the car systems but nowhere can I find anything related to the headlight washer system.
So my thoughts are that the relevant electronics in the car have 'forgotten' the car has headlight washers fitted.
Anybody any suggestions or am I going to have to employ the services of someone with the correct piece of kit to re-program the car as required?
Despite extensive internet searching I have only found one reference to a similar problem and that was on the rennlist forum where a helpful owner had responded to a poster with '....I had non-fuctioning headlamp washers and heated seats at the same time. The solution was a handover(sic) reset on PIWIS.'
I am not sure whether that poster meant a 'hard reset on PIWIS' if he/she didn't then what is a 'handover reset'?
I do not have heated seats.
I have an iCarsoft i960 OBD reader and having spent some time trawling through all the options it offers and it shows me things like the values for the intermittent wiper delay values and other values for various of the car systems but nowhere can I find anything related to the headlight washer system.
So my thoughts are that the relevant electronics in the car have 'forgotten' the car has headlight washers fitted.
Anybody any suggestions or am I going to have to employ the services of someone with the correct piece of kit to re-program the car as required?