How long does battery need to be disconnected to reset ECU?

Disconnecting the battery for a short time may not do the trick because the car’s computer, or ECU, still has some current in it. Waiting for over 15 minutes after disconnecting the engine will help ensure the equipment is reset.

What should I do if my car battery is dead?

Now connect the black cable clamp to the working battery’s negative (-) battery terminal. Do not connect the final black cable clamp to the dead battery. Instead, attach that clamp to an unpainted, metal part of the car, such as a clean nut on the engine block. This will help ensure a safe jump.

Can a loose battery cable cause a car to die?

In my years as a mechanic, one thing I have learned is that an old battery or loose battery cables can cause really big problems that make it appear that something complicated is wrong with your vehicle.

When is it time to replace your car battery?

If you have to jump your vehicle more than three times in a single week, it’s time to replace your battery. Even a fairly new battery can turn into a dud really quickly if it has been jumped more than three times in a week.

Why does the horn blow when the battery dies?

When the battery died, the car’s alarm system assumed that someone is tampering with the battery or had disconnected it in order to break into the car. Here’s what you can do hook up the jumper cables. The horn will start to blow.

What should I do if my battery is dead?

Charged battery, try to start dash lights blink on … read more Engine will not start. I tried jump start it. It will goes Yes. I tried jump start it. It will goes to ACC mode as soon as I connected the jumper. but engine will not turn over … read more Vocational, Technical or Tra… 20 year experience diagnos… Subaru and Nissan factory t…

When to know if your alternator or battery is dead?

If the engine starts but dies immediately, your alternator probably isn’t keeping your battery charged. If a jump starts and keeps your car running, but the car can’t start again off of its own power, a dead battery is likely your answer.

Is it possible to fix a car stereo that quit working after the battery died?

And it probably isn’t. In most cases, fixing a car stereo that quit working after the battery died is a lot simpler than that. Of course, it can also be a lot more complicated. There are a few different reasons for a car radio to stop working after the battery has gone completely dead.

What to do if your VW wont start after a battery change?

Leave the cables disconnected for fifteen minutes If this doesn’t yield results, then you can try this alternative method to get your key to reprogram itself: Ensure that the battery is being charged with a charger Leave the key in the ignition with the battery on and the engine off for an hour