HI all,
I keep getting the message "Voltage too low - top disabled" after the car has stood for a couple of days and cannot understand why as the car is charging ok (do about 250 miles a week) and had a new AGM battery last year.
Has anyone had this problem before? If so what was the fix, could it be a bad bettery sensor?
Did you mount additional electrical parts that have a canbus interface e.g. a tow-bar or a happyblue module or a throttle control box? If it is like this have you disconnected the battery afterwards? It seems like disconnecting the battery do some kind of reset of all interfaces.
I fitted a tow bar about 2 years ago and had a new battery 1 year ago and not had a problem until about 2 months ago
Do you have a measuring device to measure the standby current? When you want to measure it lock the car and then wait a few minutes until all control devices in the car are in standby. Probably we can then compare your standby current with the standby current of my car.
Hi Fighter1968,
I haven't tried locking the car and testing it so will try it tomorrow whilst i'm changing the rear brakes and suspension.
The tests I have done without locking the car are:
Engine off: 12.44V
Engine on at idle: 13.64V
I did one test at both battery terminals and one test at the positive terminal and body earth, both tests came out the same.
I talked about the standby current. Not the voltage.
Let me explain:
assuming your standby current is 0,5 ampere.
After 10 hours this is 0,5 ampere x 10 hours = 5 ampere per hour = 5Ah
After 100 hours this is 0,5 ampere x 100 hours = 50 ampere per hour = 50Ah
When your battery has 70Ah capacity the battery is empty after about 140 hours.
Ah I see, so used to checking battery voltage not current. Does these need checking across the battery terminals?
Sorry. Don't understand you.
sorry not sure if translation ok.
Do you put amp meter to the positive and negative terminals on the battery itself?