How long does it take for a car computer to reset after disconnecting the battery?
How long does it take for a car computer to reset after disconnecting the battery? 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 happens when you disconnect the battery in a car? When the battery is disconnected this provides the reset signal that the PATS system is looking for. There are several "gangs" inside the ignition switch. A set of wiring diagrams would be needed to confirm...