You updated, but now Wi-Fi is greyed out. This is a "persist partition" mismatch. You need to re-flash the persist image. This requires root access and ADB commands ( dd if=/sdcard/persist.img of=/dev/block/by-name/persist ).
If the unit doesn't auto-detect, press the physical Reset button using a paperclip while the USB is inserted, or power cycle the vehicle. Step 3: The Update Matrix