The TOC error on a Kenwood car indicates that the unit is not reading the Table of Content and requires service. The stereo should be taken to a qualified Kenwood service facility for further inspection and resolution of the problem.
The error codes E-04 and E-05 also refer to an inability to read the Table of Content but typically refer to issues with a dirty or unreadable disc. If the error refers to the disc, cleaning the disc is the first recommendation, but if the disc is visibly scratched or scuffed, cleaning doesn't help. If the disc has been burned or created by the user as opposed to a commercial disc, the format of the files on the disc might be the problem. The user manual should be referenced to determine which file formats the player can recognize.
Error codes, troubleshooting and resolutions for some issues can be found in the appropriate user manual for the stereo. Kenwood USA makes user manuals available through its website as long as the appropriate model number is known. The Kenwood Corporation started in 1946 under the name Kasuga Radio Company, Ltd. It was renamed three times with the final change occurring in 1986. In 2007, Kenwood invested in Victor Company of Japan, Limited and established JVC Kenwood Holdings, Inc., in 2008 as a result.