Hi guys
I have a 2006 HSE (Jaguar 4.4 v8 engine). I occasionally get the odd HDC or DSC errors. Sometimes the car wont shift higher than gear 3. When these kinds of errors happen, I'll just pull over, turn it off, wait a few seconds then start it up again.
I've also noticed that sometimes the blower motor turns itself down (the speed), which I'm not worried/concerned about, just saying in case it rings a bell.
Whilst I was trying to park up today, the car shut itself off. I fired it up again and it shut itself off again. I turned off the AC blower and fired it up again, this time it was ok. Parked, did what I needed to do, came back to the car, and it started by fine. Tried not to run the AC blower on high after that as I didn't want to be stranded.
I took it to a garage who tested the battery and their tester said my battery only had 47 CCA and it needed to be replaced, although the tester settings only went up to 900 CCA, and mine is a 950 CCA AGM 105A Varta. They told me to go to their bigger branch so I went there and they tested it with a better tester (Midtronics MDX-651P AP) and it said the battery was at 12.1v with a measured 759 CCA. The machine says the battery is "GOOD, RECHARGE", with battery health showing around 30%. He measured the voltage with the car on and it was coming up as 13.2v.
I came home, a few hours later went out and popped the bonnet and without starting had around 12.15v across the terminals. A few seconds after starting I had around 12.89v across the terminals. I turned the blower fan all the way up and the headlights too. Got same, around 12.89v across the terminals. Then I turned on the high beam and fog lights as well. This time I got like 13.8v or so across the terminals. Measuring with a Draper digital multimeter with a good battery.
The battery currently on the car was fitted in May/June 2021. It was a brand new Varta 950 CCA 105AH AGM. I use the car around twice a week, usually for runs at least 15km (each direction).
I live in Qatar so car batteries usually last around 2 years here (as it's super hot here). Standard batteries usually last 2 years max. AGM ones usually last 2 years minimum, sometimes 3 years.
I'm thinking I might have an alternator problem. The shop I went to (reputable guys for batteries, tyres, etc, but not specialists) said that the voltage across terminals should be 14v minimum when the car is running. The Land Rover independent mechanic I spoke to here says that the voltage can be between 13.5v to 14v. Common knowledge says 14.4v is the target. There are plenty of happy people on these forums with 13.8v etc.
I'm not sure what the deal with my car is. Shortly after starting I got a reading of 12.8v. When I turned on everything I got 13.8v. The shop measured 13.2v. What's the deal here? Why so much fluctuation? If it was constantly 12.8 or 13.2 I'd say change the alternator, but the fact I saw it at 13.8 with everything turned on makes me hesitate. What are your thoughts?
I have a 2006 HSE (Jaguar 4.4 v8 engine). I occasionally get the odd HDC or DSC errors. Sometimes the car wont shift higher than gear 3. When these kinds of errors happen, I'll just pull over, turn it off, wait a few seconds then start it up again.
I've also noticed that sometimes the blower motor turns itself down (the speed), which I'm not worried/concerned about, just saying in case it rings a bell.
Whilst I was trying to park up today, the car shut itself off. I fired it up again and it shut itself off again. I turned off the AC blower and fired it up again, this time it was ok. Parked, did what I needed to do, came back to the car, and it started by fine. Tried not to run the AC blower on high after that as I didn't want to be stranded.
I took it to a garage who tested the battery and their tester said my battery only had 47 CCA and it needed to be replaced, although the tester settings only went up to 900 CCA, and mine is a 950 CCA AGM 105A Varta. They told me to go to their bigger branch so I went there and they tested it with a better tester (Midtronics MDX-651P AP) and it said the battery was at 12.1v with a measured 759 CCA. The machine says the battery is "GOOD, RECHARGE", with battery health showing around 30%. He measured the voltage with the car on and it was coming up as 13.2v.
I came home, a few hours later went out and popped the bonnet and without starting had around 12.15v across the terminals. A few seconds after starting I had around 12.89v across the terminals. I turned the blower fan all the way up and the headlights too. Got same, around 12.89v across the terminals. Then I turned on the high beam and fog lights as well. This time I got like 13.8v or so across the terminals. Measuring with a Draper digital multimeter with a good battery.
The battery currently on the car was fitted in May/June 2021. It was a brand new Varta 950 CCA 105AH AGM. I use the car around twice a week, usually for runs at least 15km (each direction).
I live in Qatar so car batteries usually last around 2 years here (as it's super hot here). Standard batteries usually last 2 years max. AGM ones usually last 2 years minimum, sometimes 3 years.
I'm thinking I might have an alternator problem. The shop I went to (reputable guys for batteries, tyres, etc, but not specialists) said that the voltage across terminals should be 14v minimum when the car is running. The Land Rover independent mechanic I spoke to here says that the voltage can be between 13.5v to 14v. Common knowledge says 14.4v is the target. There are plenty of happy people on these forums with 13.8v etc.
I'm not sure what the deal with my car is. Shortly after starting I got a reading of 12.8v. When I turned on everything I got 13.8v. The shop measured 13.2v. What's the deal here? Why so much fluctuation? If it was constantly 12.8 or 13.2 I'd say change the alternator, but the fact I saw it at 13.8 with everything turned on makes me hesitate. What are your thoughts?
