Changing battery on California

You will need to take some things apart to do it right, but it is manageable. You will probably want to order some new clamps ahead of time for the intake hose assemblies, as well as an Oetiker clamp tool. I think some of the Oetiker clamps may have been replaced with worm feeds at some point, but I used the same OEM clamps on mine.

First you disconnect the battery by loosening the clamp and removing the negative terminal connector.

Next you need to remove the cosmetic shields in the engine compartment.

Disconnect the MAF sensors on the two intake hoses.

Unscrew the fasteners for the top of the air filter housings.

Carefully loosen the two clamps on the intake hoses at the throttle bodies, which are connected to the intake manifold. (You can use a small screwdriver to carefully loosen the crimped part of the clamps. You will want to replace these for reassembly.)

You can then remove the intake hoses and set them aside.

There is a cover you need to remove to access the positive terminal. Remove it and then disconnect the battery.

Unbolt the battery retaining bracket and remove the battery.

Note that its a little awkward to lift the battery in or out by yourself. They are heavy, so get a friend to assist you.

Note that you will need to go through this reset after you reconnect the battery or you might not be able to open the trunk, etc.:

Each time the battery is connected to the electrical system of the vehicle, WAIT 1 MINUTE before inserting the key in the ignition switch and do not switch on any current consumers during this period.

After inserting the ignition key, turn to "II" and WAIT AT LEAST 1 MINUTE before starting the engine.

This procedure ensures that the ECUs in the vehicle are powered up and synchronized correctly, that all motorized valve aperture and closure travel parameters are self-acquired correctly and that AC ECU self-acquisition is performed correctly.

These self-acquisition procedures are initiated each time the battery is connected to the vehicle.

Before starting the engine again, perform the following operations: close the doors, the engine compartment lid and the luggage compartment lid, unlock and lock the doors with the remote control, open the luggage compartment lid with the remote control, set the date and time on the instrument panel, close the doors, raise the door windows and rear quarterlights to the upper limit and check that the windows drop to the target position when the doors are opened.

If this procedure is not followed correctly, the buttons in the passenger compartment for opening the luggage compartment lid, locking/unlocking the doors and releasing the fuel filler flap will be disabled.

Each time the battery is disconnected from the electrical system of the vehicle, all the self-acquisition parameters are cancelled from the ignition/injection ECU.

These parameters must be restored before the vehicle is used again, proceeding as follows.

• The self-acquisition function of the Motronic ECUs will only be performed correctly at intake air temperatures above 5 °C. Ensure that the ambient air temperature is not below this value.
• Leave the engine stationary for approximately 10 minutes in the following conditions: engine at idle speed;vwater temperature stabilised; current consumers switched off (lights, windscreen wipers etc.); air conditioner off.
• These preparations allow the ECU to optimise the self-adaptive parameters quickly by preventing irregular engine operation.

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Didn’t have to look any farther than halfway down the first page to find everything you need.

https://www.ferrarichat.com/forum/threads/diy-battery-replacement-in-2014-california-non-hele.632052/