United States Department of TransportationInterpretation ID: aiam4309
Technical Manager
MMC Services
Inc.
3000 Town Center Suite 1960
Southfield
MI 48075;
Dear Mr. Takechi: This responds to your letter requesting an interpretation of Standar No. 101, *Controls and Displays.* Your questions are responded to below.; By way of background information, the National Highway Traffic Safet Administration does not provide approvals of motor vehicles or motor vehicle equipment. Under the National Traffic and Motor Vehicle Safety Act, it is the responsibility of the manufacturer to ensure that its motor vehicles or equipment comply with applicable safety standards. The following represents our opinion based on the facts provided in your letter.; Your first question concerns the identification requirements for master lighting switch. You stated your belief that if the headlamps and tail lamps are controlled by the master lighting switch, the switch is not required to be marked with any symbol other than that specified in Standard No. 101 for the master lighting switch. You also stated your belief that the manufacturer has an option to use other symbols in addition to that symbol. As discussed below, your understanding is correct.; Section S5.2.1(a) states: >>>Except as specified in S5.2.1(b), any hand- operated control liste in column 1 of Table 1 that has a symbol designated for it in column 3 of that table shall be identified by either the symbol designated column 3 (or symbol substantially similar in form to that shown in column 3) or the word or abbreviation shown in column 2 of that table.... Words or symbols in addition to the required symbol, word or abbreviation may be used at the manufacturer's discretion for the purpose of clarity....<<<; Column 3 of Table 1 designates the symbol shown in your letter for th master light switch. Also, footnote 2 of the Table states that separate identification is not required for headlamps and tail lamps if they are controlled by a master lighting switch. Thus, the master lighting switch symbol is sufficient identification under Standard No. 101 for the control identified in your letter.; A drawing provided with your letter shows various positions of th master lighting switch identified by a word or symbols, which are provided in addition to the master lighting switch symbol. As indicated in the above-quoted text, section S5.2.1(a) permits words or symbols in addition to the required symbol or word, for purposes of clarity.; Your second question concerns identification requirements for an uppe beam control. You stated that you believe no symbol is required for the upper beam control if it is on the turn signal lever, and that it is at the manufacturer's option to use a symbol.; Standard No. 101 does not specify any identification requirements fo an upper beam control, regardless of whether it is on the turn signal lever. Thus, the manufacturer has the option of deciding whether to identify the control and, if so, how to identify it. We note that the symbol you plan to use for future models is the same as designated in Standard No. 101 for the highbeam (upper beam) telltale. Thus, your planned approach appears desirable in minimizing the number of symbol's drivers must familiarize themselves with for the same function.; Sincerely, Erika Z. Jones, Chief Counsel