Clock losing time

[Bobarache]

Am having a problem with my clock..... every couple of days when I get in to the car in the morning the clock has reset......trip info, L/100km and km to empty is still ok but the time is way out.

Battery is only about a month old and connections look good....anyone have any idea what the cause could be ?

[tony-1977]

I've had this happen 3 times on my 2.2DTi SRi, in the 7 months I've owned it. Since setting the clock to auto-adjust, it's never happened again

[Birchy63]

Issue with a voltage regulation cct maybe?

When you start the car, there's a sharp dip in voltage from the battery (perfectly normal). The clock will be supplied from a voltage regulator of some sort (might even be part of the clock though), which ensures it's getting a constant supply voltage (probably standard CMOS or TTL voltages between 3.3v and 5v), there would also be a large value capacitor on the lower voltage side, which discharges when you start the car, thus keeping that voltage up to prevent the clock resetting.

My money would be on the aforementioned capacitor, but if it's part of the clock then your slightly screwed