Navigation - Retrieve Serial Number from Device Display Ignore the U and L and record all 8 digits.And L with the last 4 digits of the serial number (L0055 for example.).The display toggles between two screens: U with the first 4 digits of the serial number (U2200 for example,).Press and hold the 1 and 6 radio preset buttons, and turn ON the device.If you don’t see this message, pull the backup fuse for 1 minute, and then go back to step 1. Turn ON the device and confirm that the display reads COdE.Retrieve Serial Number from Device DisplayĪll Other Models other than 2004 - 2008 TSX with Navigation System