ID: aiam1744

Dear Mr. Kennebeck: This responds to Volkswagen's December 11, 1974, request fo confirmation that the deletion of the ignition interlock requirement from Standard No. 208, *Occupant crash protection*, does not have the effect of prohibiting installation of an interlock device in a vehicle which meets the requirements of S4.1.2.; Volkswagen will utilize a passive belt system in satisfaction of th requirements of S4.1.2. Passive belts are subject to specific belt assembly requirements of S4.5.3.3. These requirements were recently modified by deletion of the requirement for a belt interlock system (39 FR 38380, October 31, 1974), and passive belt assemblies must now conform to S7.1 (Adjustment), S7.2 (Latch mechanism), and S7.3 (Seat belt warning system).; Your interpretation of these requirements is correct. The Federal moto vehicle safety standards are minimum performance requirements with which each vehicle to which they are applicable must comply. They do not, however, prohibit installation of additional safety devices. As a practical matter, of course, additional devices could not be installed if that installation had the effect of causing the required systems not to comply.; The NHTSA agrees than (sic) an interlock system is important fo ensuring use of a passive belt system.; Yours truly, Richard B. Dyson, Acting Chief Counsel

ID: aiam1683

Dear Mr. Lugash: This responds to your October 30, 1974, questions whether th Department of Transportation or any 'private establishment' requires manufacturers to file specifications for automobile, motorcycle, and airplane tires, whether Standard No. 119, *New pneumatic tires for vehicles other than passenger cars*, lists these specifications, and what the number '222474 7MRR' means on the bead of a motorcycle tire.; The Department of Transportation's National Highway Traffic Safet Administration has issued Standard No. 119 (effective March 1, 1975), which establishes minimum performance and labeling requirements with which the manufacturer must comply. A copy of the standard is enclosed. Certain tire specifications must appear on the sidewall, and certain rim-matching specifications must be published by the manufacturer or appear in a publication of at least one private tire organization.; It is the general practice of the tire industry to list specification of tires in a private publication, such as the 'Year Book' of the Tire and Rim Association in the United States. Their address is: The tire and Rim Association, Inc., 3200 West Market Street, Akron, Ohio 44313.; The NHTSA Tire and Wheel Division has determined that the number whic you cite is of significance only to the manufacturer of the tire.; Yours truly, Richard B. Dyson, Acting Chief Counsel

ID: aiam1529

Dear Mr. Beller:#This responds to your May 10, 1974, request fo permission to stamp label information on hose assemblies in place of banding, and to reduce S9.2.5 burst pressure from 350 to 100 psi, and your further request for an interpretation of the status of an inline check valve as part of a vacuum brake hose.#The inline check valve is not subject to Standard No. 106, *Brake hose*, as a brake hose end fitting. In this configuration, the couplers depicted in your drawing are the clamps, and the check valve is a separate component to which the hose assemblies are attached.#The issue of stamping instead of banding will be answered in our upcoming Notice 11 in response to petitions for reconsideration of the brake hose standard.#Your petition for a reduction in the burst strength requirement for vacuum hoses is denied. The minimum burst pressure of 350 psi was established by the Society of Automotive Engineers in 1942, taking into consideration the effects of backfire pressure and the severe underhood environment to which vacuum hose may be exposed. Hoses with this burst pressure have provided excellent reliability and durability. We have no data to justify a reduction in burst strength in view of the two hazards just cited.#Sincerely,Robert L. Carter,Associate Administrator,Motor Vehicle Programs;

ID: aiam2866

Dear Mr. Kurre: This responds to your recent letter asking whether Safety Standard No 208, *Occupant Crash Protection*, does require side- facing seats in multipurpose passenger vehicles to comply with one of the options under paragraph S4.2.2, since the side-facing seats in question would be considered designated seating positions. If a manufacturer chooses to install seat belts under one of the options of that paragraph, the seat belt assemblies must comply with Safety Standard No. 209, *Seat Belt Assemblies*, and Safety Standard No. 210, *Seat Belt Anchorages*.; Safety Standard No. 210 does exempt side-facing seats from its strengt requirements, but all other requirements of the standard would be applicable. However, we strongly recommend that belt anchorages for side-facing seats be of at least equivalent strength to anchorages for forward and rearward facing seats, since the strength specifications are only minimum performance requirements. Side-facing seats were excepted from the strength requirements specified in the standard because the forces acting on side-facing seats are different from those acting on forward or rearward facing seats and the requirements and procedures were specifically developed for these latter seats.; Please contact this office if you have any further questions. Sincerely, Joseph J. Levin, Jr., Chief Counsel

ID: aiam3790

Dear Mr. DiMaggio: This is in reply to your letter of December 8, 1983, to th Administrator, petitioning for a determination that a noncompliance with Motor Vehicle Safety Standard No. 117, *Retreaded Pneumatic Tires*, be deemed inconsequential as it relates to motor vehicle safety.; The noncompliance consists of omission of the 'DOT' certificatio symbol. You have represented that tires so affected nevertheless meet Standard No. 117 in all other respects.; It has been the policy of this agency since 1977 to treat omissions o the DOT symbol as failures to certify pursuant to Sections 114 and 108(a)(1)(C) of the National Traffic and Motor Vehicle Safety Act rather than as failures to comply with the Federal motor vehicle safety standard that requires or allows that method of certification. The symbol is not considered to establish a minimum standard of motor vehicle performance. This means that manufacturers who fail to provide the symbol are not required to conduct a notification and remedy campaign, and that accordingly the National Highway Traffic Safety Administration is not required to publish notices of petitions requesting inconsequentiality determinations.; Your petition is therefore moot. Thank you for bringing this matter t our attention.; Sincerely, Frank Berndt, Chief Counsel

ID: aiam1735

Dear Mr. Danis: This is in response to your letter of October 23, 1974, requesting ou comments on your West Coast type mirror (which includes a ground-in convex spot mirror) and information on Federal regulations for spot mirrors in general.; Standard No. 111, *Rearview Mirrors*, provides minimum performanc requirements for rearview mirrors on passenger cars and multipurpose passenger vehicles. According to the standard, the outside rearview mirror required to be placed on the driver's side of the vehicle must be furnish the driver with a specified field of view to the rear of substantially unit magnification. As long as the mirror is capable of satisfying these field view requirements, the inclusion of a convex spot mirror no the plane mirror (as with the West Coast mirror) is not prohibited by the standard. If your West Coast type mirror is capable of providing the required view of substantially unit magnification independent of its convex spot mirror, it will comply with the standard.; The recent notice proposing to amend the rearview mirror standard (Ma 1, 1974, 39 FR 15143), does not alter the above described permissible use of West Coast type mirrors. No requirements for spot mirrors are contained in the Federal motor vehicle safety standards.; We appreciate your interest. Yours truly, Richard B. Dyson, Acting Chief Counsel

ID: 12-001952 Matheny capacity includes driver (Standard No. 217)

ID: 18890.jeg

Mr. Meyer Snyder
5134 Bocaw Pl
San Diego, CA 92115-1717

Dear Mr. Snyder:

This responds to your letter asking whether you can have the force of the air bags on your 1995 Toyota Camry "turned down." You asked whether this can be done at your Toyota dealer and, if not, where it could be done, and whether you would have to pay for this modification.

As discussed below, there is no legal impediment to vehicle manufacturers and dealers modifying older vehicles so that they have the same kinds of redesigned air bags being offered on most new vehicles. However, such modifications would likely be very complicated and potentially expensive, and we are not aware of any vehicle manufacturers or dealers which make such modifications. You may wish to ask Toyota about whether it is possible to modify your vehicle in this manner and at what cost.

By way of background information, the National Highway Traffic Safety Administration (NHTSA) is authorized to issue Federal motor vehicle safety standards that apply to the manufacture and sale of new motor vehicles and new motor vehicle equipment. One of the standards we have issued is Standard No. 208, Occupant Crash Protection (49 CFR 571.208). Manufacturers install air bags in passenger cars as part of complying with the occupant protection requirements of Standard No. 208.

While the Federal motor vehicle safety standards apply only to new motor vehicles and new motor vehicle equipment, Federal law limits the modifications that can be made by certain businesses to used vehicles. Manufacturers, distributors, dealers, and repair businesses are prohibited from "knowingly making inoperative" any device or element of a design installed on or in a motor vehicle in compliance with an applicable safety standard (49 U.S.C. 30122).

A manufacturer, dealer or other business which modified the air bags on your 1995 Toyota Camry would not violate the "make inoperative" provision if, after the modification, the vehicle continued to meet the relevant requirements in effect either on the date of manufacture or as later amended. In 1997 NHTSA amended Standard No. 208 to make it easier for manufacturers to quickly redesign their air bags, e.g., by reducing the power as compared to previous years. Compliance with the amended requirements would thus not violate the "make inoperative" provision. As noted earlier, however, the modifications that would need to be made to an existing vehicle so that it would have redesigned air bags would likely be very complicated and potentially expensive, and we are not aware of any vehicle manufacturers or dealers which make such modifications.

I am pleased to hear that you do not want your air bags turned off. The vast majority of persons, including short persons, are much safer with air bags. Among other things, an air bag will minimize the risk of violently striking the steering wheel and dashboard in a moderate to severe crash.

I would also like to point out that there are a few basic steps that you can take to minimize air bag risks, including wearing your safety belts and, when driving, keeping at least 10 inches between the center of the air bag cover and your breastbone. I have enclosed an information brochure, written in the context of making an informed decision about on-off switches, which provides additional information concerning how you can reduce air bag risks.

Sincerely,
Frank Seales, Jr.
Chief Counsel
Enclosure
ref:208
d.2/3/99

ID: nht76-2.16

DATE: 07/30/76

FROM: AUTHOR UNAVAILABLE; F. Berndt; NHTSA

TO: Thomas Built Buses, Inc.

TITLE: FMVSS INTERPRETATION

TEXT: This responds to Thomas Built Buses' June 4, 1976, question whether the requirements in S5.1.3 and S5.1.4 of Standard No. 222, School Bus Seating and Crash Protection, to "Apply additional force . . . through the . . . loading bar until (a specified number) of inch-pounds of energy has been absorbed in deflecting the seat back . . ." can be satisfied in part by the energy that is returned to the load bar as it is withdrawn from the seat back. You also ask if there are minimum or maximum time limits on withdrawal of the loading bar from the seat surface.

The requirement for the absorption of a minimum amount of energy in (Illegible Word) the seat back in the forward and rearward directions is calculated to provide adequate measurement of the energy involved in the impact between the bus occupants and the seating in a percentage of school bus crashes. The agency calculated the amount of energy to be consumed by the seat back that would result in adequate protection. The specification requires the seat to "absorb" (i.e., receive without recoil) a specific amount of energy. This value is represented by the amount of energy that is not returned to the loading bar as it is withdrawn. Described graphically, the area that represents returned energy under the seat back force/deflection curve must be subtracted from the entire area that lies under the curve in order to calculate the energy "absorbed" by the seat back.

With regard to your second question, no time limits have been established for withdrawal of the loading bar. The agency intends to utilize a withdrawal time that is not more than five minutes so that creep will not be a significant factor in determining energy absorption. Because the time is not specified, the manufacturer is free to use any reasonable time that does not significantly affect the elastic and plastic components of the seat back loading.

thomas BUILT BUSES, INC.

June 4, 1976

Mr. Bob Krause Office of Standards Enforcement Motor Vehicle Programs U.S. Dept. of Transportation National Highway Traffic Administration

Re: Part 571 - Federal Motor Vehicle Safety Standards - Para. 571.222 S5.1.4.1 & S5.1.4.2

Our engineering department is in the process of developing testing and analysis techniques for demonstration of compliance with the referenced section of FMVSS. To ensure that these techniques will meet all requirements, we are in need of further clarification of the paragraphs pertaining to seat back load application. Accordingly, we would appreciate answers from your department on the following specific questions:

(1) Para. 571.222 S5.1.4.2 specifies energy absorption of the seat back deflection during load application. What is the significance of or treatment required of the energy returned during the backing off of the loading bar?

(2) Are there any requirements regarding elapsed time interval for the load back-off?

(3) Same questions re Para. 571.222 S5.1.3 thru S5.1.3.4 - Seat Performance Forward.

Thank you for your prompt assistance in answering these questions.

Malcolm B. Mathieson Engineering Manager

ID: nht90-3.78

TYPE: Interpretation-NHTSA

DATE: August 31, 1990

FROM: Paul Jackson Rice -- Chief Counsel, NHTSA; Signature by Stephen P. Wood

TO: Samuel Kimmelman -- Engineering Product Manager, Ideal Division, EPICOR Industries, Inc.

TITLE: None

ATTACHMT: Attached to letter dated 8-2-90 from S. Kimmelman to P.J. Rice (OCC 5074)

TEXT:

This is in reply to your letter of August 2, 1990, with respect to Motor Vehicle Safety Standard No. 108.

It is your understanding that, when a vehicle is delivered to its purchaser with dealer-installed trailer hitch and associated wiring, it must conform to all applicable Federal motor vehicle safety standards. You interpret the standards as requiring thre e specific aspects of performance, and you ask whether we agree with those interpretations. These aspects are:

"1. The turn signal flasher must be certified as meeting the FMVSS-108 requirements of a variable load turn signal flasher, over a minimum load equal to that of the vehicle turn signal load and a maximum load equal to that of the vehicle plus the trailer ."

This is essentially correct. However, it is not the flasher that is certified but the vehicle in which the flasher is installed; Standard No. 108 does not require certification of original equipment lighting items, only replacement equipment items. Sta ndard No. 108's requirements for turn signal flashers are those of SAE Standard J590b, Automotive Turn Signal Flasher, October 1965, which are incorporated by reference. Under the Standard's Scope, the flashers "are intended to operate at the design loa d for the turn signal system as stated by the manufacturer." If a vehicle is designed for towing purposes, and its manufacturer offers an optional trailer hitch and associated wiring, then that manufacturer must equip the vehicle with a flasher capable of meeting a minimum load equal that of the vehicle turn signal load, and a maximum load equal to that of the vehicle plus the trailer. That will be a variable load turn signal flasher. The manufacturer of the vehicle is the person responsible for ensu ring that the flasher meets the vehicle's design load requirements, and that the vehicle is certified as conforming to Standard No. 108.

"2. The hazard warning signal flasher must be certified as meeting the requirements of FMVSS-108 over a load range of 2 lamps to the combined hazard warning loads of the vehicle plus the trailer."

This is also essentially correct, and our comments are similar. Standard No. 108's requirements for hazard warning signal flashers are those of SAE Recommended Practice J945 Vehicular Hazard Warning Signal Flasher, February 1966, which are incorporated by reference. The Practice's Scope specifies that the flashers "are required to operate from two signal lamps to the maximum design load. . . . as stated by the manufacturer. Thus, in

order for the vehicle manufacturer to certify compliance with Standard No. 108, it must equip the vehicle with a flasher that operates over a load range of two lamps to the total hazard warning system load of the vehicle plus the trailer.

"3. The requirement to provide turn signal outage is voided due to the trailer towing capability of the vehicle."

This is correct. Under section S5.5.6 of Standard No. 108, any vehicle equipped to tow trailers and which uses a variable-load turn signal flasher is exempted from the failure indication requirements of the SAE standards on turn signals.

I hope that this answers your questions.