How do I restart SMC?
SMC
- Shut down the computer.
- On the left side of the keyboard, press and hold the Shift, Control, and Option keys while simultaneously holding the power button.
- After 10 seconds, release all of the keys.
- Turn on your MacBook.
Do you need to initialize an ECU after reconnecting the battery?
In some cases, this may also occur if the battery voltage becomes low or if the battery is recharged. After the battery is reconnected, these systems must be initialized before they can work properly. An ECU also typically requires initialization after the ECU or a component it controls has been removed or replaced. Customized Settings
What happens to ECUs when the battery is disconnected?
When the vehicle’s battery is disconnected, some ECUs will lose information stored in their memory. In some cases, this may also occur if the battery voltage becomes low or if the battery is recharged. After the battery is reconnected, these systems must be initialized before they can work properly.
How long does it take to relearn the ignition switch?
When performing this relearn, all previously learned keys will be erased. Additional keys may be relearned immediately after the first key has been learned by inserting the additional key and turning the ignition switch to on within 10 seconds of removing the previously learned key. Turn key to the “ON” position without starting the engine.
How to do a Relearn on Passkey III?
To perform a relearn on a Passkey III system, make sure there is a fully charged battery in the vehicle. The battery will be used for 30 minutes without the alternator available for charging. Connect a battery charger to the battery to ensure power is available while programming.
What to do if you have electrical issues after replacing a battery?
If you’re experiencing electrical issues immediately after a battery replacement or disconnect, make sure the battery cables were re-attached and tightened down properly. Herculean strength isn’t necessary, but the cables should be snug and not move around or come off of the battery posts.
In some cases, this may also occur if the battery voltage becomes low or if the battery is recharged. After the battery is reconnected, these systems must be initialized before they can work properly. An ECU also typically requires initialization after the ECU or a component it controls has been removed or replaced. Customized Settings
When the vehicle’s battery is disconnected, some ECUs will lose information stored in their memory. In some cases, this may also occur if the battery voltage becomes low or if the battery is recharged. After the battery is reconnected, these systems must be initialized before they can work properly.
What happens if you replace the battery in your car?
This can cause something minor, like the clock to lose its time, but it can also lead to engine stalling or even a failed smog inspection. In order to avoid this issue, it has become more and more critical that power is supplied to the electrical system while the battery is disconnected, for any reason, including replacement.