RS Tuner battery voltage on ECU write?

[Ade182]

Rs tuner is saying battery voltage is below 12.3 when I go to write and to proceed at my own risk. Car is hooked up to a cheap battery charger and battery levels flick between red Nd green in rst

is it ok to proceed?

 

[rdoxenham]

What does a multimeter say?

 

[Ade182]

12.8 12.9 on RsTuner I don't have a multimeter

 

[rdoxenham]

Hmm, I'd exercise caution but I've not used an RS Tuner before. You got access to another battery from another car whilst you do the write? No doubt your battery is actually fine but if I was about to flash my ECU I'd want to make sure the battery was flawless

 

[Ade182]

Re-tried it and no error this time. Wish me luck!

 

[Sam]

It will be fine.

I've mapped about 30 cars with my RS Tuner and I've never seen one of them drop a significant amount in voltage! Only takes about 30 minutes to write the .rst and 2 minutes for the .cal

Make both back ups, then start the car, leave running for 10 minutes.

After that, write the files. Simples

 

[Ade182]

I've already started the write ECU now without starting the car. I took it for a good boot down the motorway and connected it up to the charger when I got home, then connected up the rst.

 

[Ade182]

Sat in the car now, everything completed ok, it's idling at 1,000rpm so I guess it's time to go for a play!

 

[Addicted]

Sat in the car now, everything completed ok, it's idling at 1,000rpm so I guess it's time to go for a play!

Yep

It will take a journey or two for cruise control to work, enjoy the new car, makes so much difference its unbelievable!