NHTSA Interpretation File Search
Overview
NHTSA's Chief Counsel interprets the statutes that the agency administers and the standards and regulations that it issues. Members of the public may submit requests for interpretation, and the Chief Counsel will respond with a letter of interpretation. These interpretation letters look at the particular facts presented in the question and explain the agency’s opinion on how the law applies given those facts. These letters of interpretation are guidance documents. They do not have the force and effect of law and are not meant to bind the public in any way. They are intended only to provide information to the public regarding existing requirements under the law or agency policies.
Understanding NHTSA’s Online Interpretation Files
NHTSA makes its letters of interpretation available to the public on this webpage.
An interpretation letter represents the opinion of the Chief Counsel based on the facts of individual cases at the time the letter was written. While these letters may be helpful in determining how the agency might answer a question that another person has if that question is similar to a previously considered question, do not assume that a prior interpretation will necessarily apply to your situation.
- Your facts may be sufficiently different from those presented in prior interpretations, such that the agency's answer to you might be different from the answer in the prior interpretation letter;
- Your situation may be completely new to the agency and not addressed in an existing interpretation letter;
- The agency's safety standards or regulations may have changed since the prior interpretation letter was written so that the agency's prior interpretation no longer applies; or
- Some combination of the above, or other, factors.
Searching NHTSA’s Online Interpretation Files
Before beginning a search, it’s important to understand how this online search works. Below we provide some examples of searches you can run. In some cases, the search results may include words similar to what you searched because it utilizes a fuzzy search algorithm.
Single word search
Example: car
Result: Any document containing that word.
Multiple word search
Example: car seat requirements
Result: Any document containing any of these words.
Connector word search
Example: car AND seat AND requirements
Result: Any document containing all of these words.
Note: Search operators such as AND or OR must be in all capital letters.
Phrase in double quotes
Example: "headlamp function"
Result: Any document with that phrase.
Conjunctive search
Example: functionally AND minima
Result: Any document with both of those words.
Wildcard
Example: headl*
Result: Any document with a word beginning with those letters (e.g., headlamp, headlight, headlamps).
Example: no*compl*
Result: Any document beginning with the letters “no” followed by the letters “compl” (e.g., noncompliance, non-complying).
Not
Example: headlamp NOT crash
Result: Any document containing the word “headlamp” and not the word “crash.”
Complex searches
You can combine search operators to write more targeted searches.
Note: The database does not currently support phrase searches with wildcards (e.g., “make* inoperative”).
Example: Headl* AND (supplement* OR auxiliary OR impair*)
Result: Any document containing words that are variants of “headlamp” (headlamp, headlights, etc.) and also containing a variant of “supplement” (supplement, supplemental, etc.) or “impair” (impair, impairment, etc.) or the word “auxiliary.”
Search Tool
NHTSA's Interpretation Files Search
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ID: nht94-6.1OpenDATE: May 5, 1994 FROM: John Womack -- Acting Chief Counsel, NHTSA TO: Randolph Schwarz TITLE: None ATTACHMT: Attached to letter dated 9/30/93 Est. from Randolph Schwarz to John Messera (OCC-9211) TEXT: This responds to your letter to Mr. John Messera of NHTSA, requesting an interpretation of Federal Motor Vehicle Safety Standard No. 116; Motor vehicle brake fluids. Your letter has been referred to my office for a response. As a consumer retrofitting your vehicle with DOT 5 brake fluid, you had several questions concerning the possible effects that an ingredient in the brake fluid might have on elastomers used in brake systems. Your questions are answered below. You described "seal swelling additives" added to DOT 5 brake fluid, that contact various elastomers in the brake system. Your first question was, when brake fluid manufacturers combine additives with brake fluid, should consumers be concerned with the combined fluids' compatibility with various elastomers used in braking systems? Standard No. 116 defines, at S4. Definitions, brake fluid as a liquid designed for use in a motor vehicle hydraulic brake system where it will contact elastomeric components made of: styrene and butadiene rubber (SBR); ethylene and propylene rubber (EPR); polychlorophene (CR) brake hose inner tube stock; or natural rubber (NR). In order to minimize failures in hydraulic braking systems, Standard No. 116 specifies minimum performance standards for brake fluids. These performance standards include tests for styrene and butadiene rubber cups,the most common type of elastomer in a hydraulic brake system. The brake fluid manufacturer must certify that the brake fluid complies with Standard No. 116. (See S5.2.2(d).) While DOT 5 brake fluid must meet Standard No. 116, the specific ingredients in the fluid are not regulated by the standard. However, in addition to compliance with Standard No. 116, brake fluid manufacturers must ensure that the fluid is free of safety-related defects under the National Traffic and Motor Vehicle Safety Act. Sections 151-159 of the Safety Act concern the recall and remedy of products with defects related to motor vehicle safety. In the event that the brake fluid manufacturer or NHTSA determines that the brake fluid contains a safety related defect, the brake fluid manufacturer would be responsible for notifying purchasers of the defective brake fluid and remedying the problem free of charge. In your letter, you stated that you are retrofitting a vehicle with DOT 5 brake fluid. If your vehicle contained a brake fluid other than DOT 5 in its brake system, we recommend that the old fluid be flushed completely out of the brake system, before being replaced with DOT 5. This is necessary to ensure that the DOT 5 brake fluid does not mix with any other brake fluid type. Your second question was whether DOT 5 brake fluid's compliance with Standard No. 116 ensures compatibility with elastomers. The answer is yes, for SBR elastomers. Further, besides Standard No. 116, the brake fluid manufacturer is subject to sections 151-159 of the Safety Act, that were previously discussed. At this time, NHTSA is not aware of safety related defects resulting from other ingredients used with brake fluid. Your third question was whether Standard No. 116 only addresses SBR compatibility with brake fluid. Standard No. 116, at S4, addresses brake fluid that contacts four elastomer types. However, the tests specified in the standard are only of the most commonly used SBR cups. Your fourth question was, if Standard No. 116 only mentions SBR elastomer, would it be advisable to add other elastomers to the specification, or to discuss elastomer compatibility on the brake fluid container? Information discussing the elastomer compatibility of the brake fluid, or other ingredients, may be voluntarily placed on brake fluid containers. Standard No. 116 specifies information that brake fluid containers must carry. However, Standard No. 116 does not prohibit manufacturers from noting on brake fluid containers, compatibility of the silicone brake fluid, or other ingredients, with various elastomers. Finally, you asked what Standard No. 116 specifies as the maximum viscosity for DOT 5 brake fluid, at -40 degrees Fahrenheit. Standard No. 116 specifies, at S5.1.3 (o), that the maximum viscosity is 900 centistokes (cSt). I hope that this information is helpful. If you have any further questions, please contact Dorothy Nakama of my staff at (202) 366-2992.
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ID: nht94-6.10OpenDATE: April 26, 1994 FROM: John Womack -- Acting Chief Counsel, NHTSA TO: Michael E. Klima -- Managing Engineer, Failure Analysis Associates, Inc. TITLE: None ATTACHMT: Attached to letter dated 3/29/94 from Michael E. Klima to Edward Jettner (OCC-9832) TEXT: This responds to your letter of March 29, 1994, to Mr. Edward Jettner of this agency concerning the dynamic testing requirements of Standard No. 208, Occupant Crash Protection. Your questions concern the application of this standard to a pickup truck manufactured in April 1988 with a gross vehicle weight rating (GVWR) of 4,400 pounds. You asked whether the injury criteria in S6 apply to this truck, whether a 35 mph fixed barrier crash test is required, and which sections of Standard No. 208 apply to this truck. The safety belt installation requirements for all vehicle types are set forth in Standard No. 208. Section S4.2.1 of standard No. 208 gives vehicle manufacturers a choice of three options for providing occupant crash protection in trucks and multipurpose passenger vehicles with a GVWR of 10,000 pounds or less, manufactured on or after January 1, 1976 and before September 1, 1991. Option 1, set forth in S4.1.2.1, requires vehicle manufacturers to provide automatic protection at the front outboard seating positions, and either meet the lateral crash protection and rollover requirements by means of automatic protection systems or have manual safety belts at the front outboard seating positions such that those positions comply with the occupant protection requirements when occupants are protected by both the safety belts and the automatic protection. Option 2, set forth in S4.1.2.2, requires vehicle manufacturers to provide a lap or lap/shoulder safety belt at every seating position, have automatic protection for the front outboard seats, and have a warning system for the safety belts provided. Option 3, set forth in S4.1.2.3, requires the manufacturer to install lap or lap/shoulder safety belts at every seating position and to have a warning system for those belts. According to your letter, the manufacturer installed Type 2 seat belt assemblies at the front outboard seating positions. This suggests that the manufacturer chose to comply with Option 3. Under this option, the only requirements in Standard No. 208 that those belts were required to comply with were S7.1, S7.2, and S7.3. The belts were also required to comply with the requirements of Standard No. 209, Seat Belt Assemblies. The manufacturer was not required to certify that the vehicle complied with the dynamic testing requirements of Standard No. 208. The injury criteria in S6 of the standard are applicable only to vehicles which must comply with the dynamic testing requirements. Standards No. 208 does not include a 35 mph fixed barrier crash test requirement. The dynamic crash test in Standard No. 208 is barrier crash test at any speed up to 30 mph. NHTSA does perform some 35 mph barrier crash tests as part of the New Car Assessment Program (NCAP). NCAP is a consumer information program, not a safety compliance test. NHTSA does not test every vehicle under this program. In the 1993 model year program, NHTSA tested 37 new vehicles and released results on 68 additional vehicles which had been tested previously and had not changed significantly in model year 1993. I hope you find this information helpful. If you have any other questions, please contact Mary Versailles of my staff at this address or by phone at (202) 366-2992. |
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ID: nht94-6.11OpenDATE: April 25, 1994 FROM: John Womack -- Acting Chief Counsel, NHTSA TO: Richard Kreutziger -- Executive Director, New York State Bus Distributors Ass'n. TITLE: None ATTACHMT: Attached to letter dated 4/13/94 from Richard Kreutziger to John Womack (OCC-9865) TEXT: This responds to your request of April 13, 1994, for an interpretation of Motor Vehicle Safety Standard No. 108. You reference paragraphs S5.5.7(a) and (b) which apply to vehicles of less than 80 inches overall width and ask whether there are similar requirements for wider vehicles. Paragraph S5.5.7(a) requires that "(w)hen the parking lamps are activated, the tail lamps, license plate lamps, and side marker lamps shall also be activated." There is no similar requirement for vehicles whose overall width is 80 inches or more because these vehicles are not required to have parking lamps (see Table I of Standard No. 108). Paragraph S5.5.7(b) requires that "(w)hen the headlamps are activated in a steady-burning state, the tail lamps, parking lamps, license plate lamps and side marker lamps shall also be activated." Paragraph S5.5.3 requires tail lamps on all vehicles, regardless of width, to be activated when the headlamps are activated in a steady burning state. As noted in the preceding paragraph, wide vehicles are not required to have parking lamps. This leaves the question of license plate lamps and side marker lamps. As you have surmised, there is no specific requirement in Standard No. 108 that these lamps be simultaneously activated with the headlamps on vehicles whose overall width is 80 inches or greater. However, we understand that it is industry practice to wire its large vehicles in this manner. We also believe that those who do not wire the side marker lamps to operate with the headlamps include them in the separate switch that activates the clearance and identification lamps. |
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ID: nht94-6.12OpenDATE: April 25, 1994 FROM: John Womack -- Acting Chief Counsel, NHTSA TO: Christopher S. Spencer -- Engineering TITLE: None ATTACHMT: Attached to letter dated 9/8/93 from Christopher S. Spencer to R. C. Carter (OCC-9128) TEXT: This responds to your letter about the brake reservoir requirements of Federal Motor Vehicle Safety Standard No. 121, Air Brake Systems (49 CFR S571.121). I apologize for the delay in our response. You stated that you are developing a new reservoir design to improve reservoir volume without increasing the need for space. You asked how to test your reservoirs since you believe that "(t)he safety standard does not clarify the test criteria specifically how the reservoir is to be sealed." By way of background information, the National Highway Traffic Safety 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 vehicles and equipment meet applicable requirements. The following represents our opinion based on the facts provided in your letter. Standard No. 121 establishes performance and equipment requirements for braking systems on vehicles equipped with air brakes. The Standard's reservoir requirements for trucks and buses are set forth in section S5.1.2. That section requires these vehicles to be equipped with one or more service reservoir systems that meet specified performance requirements. Section S5.1.2.2 specifies the following: Each reservoir shall be capable of withstanding an internal hydrostatic pressure of five times the compressor cutout pressure or 500 psi, whichever is greater, for 10 minutes. The purpose of this requirement is to ensure that an air brake system reservoir has a minimum level of structural integrity. NHTSA has long interpreted the term "withstand" to require that there be no rupture or permanent circumferential deformation of the reservoir exceeding one percent. At one point, the agency issued an interpretation concluding that the term "withstand" meant that a reservoir can deform only slightly and must contain the applied pressure with only a limited pressure drop at any time during the test. However, NHTSA later withdrew that interpretation because it inadvertently increased the severity of the requirement. See 42 FR 64630, December 27, 1977, and 43 FR 9149, March 6, 1978. You asked about this requirement in connection with a reservoir design that includes a bushing on the inside of an endcap. A weld is placed around the bushing. You describe two different procedures you have used to seal the reservoir. In what you describe as "Test Criteria 1," a socket head plug is put into the bushing with 3 full wraps of tape. With this first method, you state that as the pressure is applied to the reservoir, the endcap starts to expand out. The bushing stretches with the endcap, and as the bushing stretches the threads are pulled away from the plug. The plug must therefore be retightened several times before the required pressure is reached. In your "Test Criteria 2," you state that a rubber grommet or washer is placed on the inside of the bushing and forced to expand to seal the bushings from the inside. You stated that this method checks the weld but removes the threads from the test. With the second method, you state that there was no failure at over five times the working pressure. While Standard No. 121 does not specify a particular test procedure for this requirement, the language of S5.1.2.2 makes it clear that a reservoir must "withstand" for 10 minutes a condition where the reservoir is pressurized at the specified level. Therefore, in conducting a compliance test, NHTSA would pressurize a reservoir to the specified level. This would necessitate sealing the reservoir. In considering how a particular reservoir would be sealed, it is important to bear in mind that the purpose of the test is to evaluate the reservoir's structural integrity and ability to withstand pressurization. I can offer you the following comments on the two alternative test methods you described. The first method (Test Criteria 1) would appear to evaluate a reservoir's ability to withstand pressurization. The threaded plug would appear to reasonably approximate how the reservoir would be sealed in an actual use situation. I note that the mere fact that the plug needs to be tightened during the test to achieve the specified level of pressure would not indicate a failure but would simply reflect minor air leakage around the plug. The second method (Test Criteria 2) would not fully evaluate a reservoir's ability to withstand pressurization, since it would, as you recognized, remove the threads from the test, thereby creating an artificial seal. It is our opinion that a reservoir would not be capable of "withstanding" the specified hydrostatic internal pressure if the threads failed under such pressurization. This would represent a structural failure equivalent to a rupture. I hope this information is helpful. If you have any questions about NHTSA's safety standards, please feel free to contact Marvin Shaw at this address or by telephone at (202) 366-2992. |
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ID: nht94-6.13OpenDATE: April 25, 1994 FROM: John Womack -- Acting Chief Counsel, NHTSA TO: Ken Simons -- Esq. TITLE: None ATTACHMT: Attached to letter dated 6/25/93 from Kenneth P. Simons to Department of Transportation, Trucking Division (OCC-8877) TEXT: This responds to your letter asking about brake requirements for trailers used in tractor trailer combinations. I apologize for the delay in our response. You asked whether all such trailers are required to be equipped with "maxi" brakes on one or both axles. You state that a "maxi" brake is found on all road tractors and "sets the brakes automatically when the air pressure gets down to a minimum level." Please note that the term "maxi" brakes ordinarily refers to spring brakes used in parking and emergency brake applications. I further note that most, but not all, trailers are equipped with spring brakes. I am pleased to have this opportunity to explain our requirements. By way of background information, under the National Traffic and Motor Vehicle Safety Act ("Safety Act," 15 U.S.C. S1392), the National Highway Traffic Safety Administration (NHTSA) is authorized to issue Federal motor vehicle safety standards applicable to new motor vehicles and items of motor vehicle equipment. NHTSA does not approve vehicles or equipment. Instead, manufacturers are required to certify that their vehicles or equipment meet all applicable standards. Standard No. 121, Air Brake Systems (49 CFR S571.121, copy enclosed), specifies performance requirements for trucks, buses and trailers equipped with air brake systems. The purpose of the standard is to insure safe braking performance of vehicle under normal and emergency conditions. While Standard No. 121 does not require manufacturers to use spring brakes or any other particular type of brake system, many manufacturers use spring brakes to comply with the standard's requirements concerning parking brake performance (truck, buses and trailers; see S5.6), emergency brake performance (trucks and buses only; see S5.7), and trailer pneumatic system failure performance (see S5.8). I note that while the requirements of S5.65 and S5.8 apply to most air-braked trailers, S3 of Standard No. 121 excludes some trailers from all of the standard's requirements. In addition, S5.6 and S5.8 specify alternative requirements for some trailers. I hope this information is helpful. If you have any further questions about NHTSA's safety standards, please feel free to contact Marvin Shaw of my staff at this address or by telephone at (202) 366-2992. |
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ID: nht94-6.14OpenDATE: April 25, 1994 FROM: John Womack -- Acting Chief Counsel, NHTSA TO: David A. Scott -- President, RKS International L.L.C. TITLE: None ATTACHMT: Attached to letter dated 3/8/94 from David A. Scott to John Womack (OCC-9783) TEXT: This responds to your letter of March 8, 1994, asking for information about this agency's regulations regarding importation and sale of motor vehicles and motor vehicle equipment. You intend to import "fiberglass kit cars." The cars may be imported "either disassembled or partially assembled." Your company "will then be providing and/or installing American parts in the U.S. for the major mechanical portions like engines, transmissions, suspension systems, tires, etc." It appears from your letter that you intend to import, items of equipment, either individually or as part of a larger assembly, which, after entry into the United States, will have the drive train and related components installed that are necessary to complete its manufacture as a motor vehicle. For purposes of this interpretation, it is unimportant whether the equipment is imported as individual items, or assembled into a vehicle lacking a power train. Some items of motor vehicle equipment are subject to the Federal motor vehicle safety standards (FMVSS). In order to be imported into the United States, they must comply with all applicable FMVSS. Passenger car equipment that must comply includes brake hoses, brake fluid, lamps and reflectors, tires, glazing material, and seat belt assemblies. It is mandatory that all these items (except lamps and reflectors) beat a DOT symbol in order to be imported; the symbol is the manufacturer's certification of compliance with the FMVSS. It is optional for lamps and reflectors to be marked with the DOT symbol. If they are not marked, permissible options include a certification statement attached to the equipment item or on the container in which the item is shipped. When assembly of the vehicle is completed in the United States, its assembler must satisfy itself that it conforms to all applicable FMVSS and affix a label certifying that the vehicle complies. I have enclosed a copy of an information sheet for new manufacturers of motor vehicles and motor vehicle equipment. It identifies relevant Federal statutes and this agency's standards and regulations affecting motor vehicle and motor vehicle equipment manufacturers. It also explains how to obtain this agency's safety standards and regulations. If you have further questions we shall be pleased to answer them. |
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ID: nht94-6.15OpenDATE: April 25, 1994 FROM: Gerald Plante -- Manager, Product Compliance, Saab Cars USA, Inc. TO: Barbara Gray -- Office of Market Incentives, NHTSA TITLE: NONE ATTACHMT: Attached to letter dated 8/9/94 from Barry Felrice to Gerald Plante TEXT: Dear Ms. Gray: Saab has made some updates to our anti-theft alarm systems in our 1995 model year Saab 900 models. I am sorry I missed your return call. I was hoping we could have had some discussion about NHTSA's current evaluation guidelines on the telephone before submitting written materials. As a way of introduction, I have taken David Raney's place as Saab's Manager of Product Compliance. Saab views the changes in 1995 components and designs with our anti-theft systems as de minimis ones that would enhance the anti-theft effectiveness of the 1994 alarm. To the extent permitted in 49 CFR Part 543.9, Saab is requesting permission to modify our existing exemption on the Saab 900. The enclosed material is primarily updates of the material provided to NHTSA on March 25, 1993. Briefly, the changes involve the following: 1. Remote control added. 2. Arming/disarming of alarm/immobilizer functions from remote control only. 3. Remote control operation of the central locking system added. 4. Immobilizer function expanded by adding fuel pump and ignition disengagement to the existing starter motor disengagement. We would very much appreciate your review of this material to confirm that NHTSA agrees with Saab on the above points. Please feel free to contact me at (404) 279-6377. Given the definition of "carline" in Part 541.4(b), all 1995 Saab cars labelled as 900 models belong to one carline: Saab 900. The basis of our petition for exemption is the specification of an effective anti-theft system on all Saab 900 models as standard equipment. In addition, this carline will be specified with an anti-theft radio system, which will further reduce the incidence of auto theft involving Saab cars. Carline Description 1995 Saab 900 Carline: Body Style Model Designation Engine Variant 2-door hatchback 900 Turbo 4 cyl., 16-valve 4-door hatchback 900 6 cyl., 24-valve 2-door hatchback 900 6 cyl., 24-valve 4-door hatchback 900 4 cyl., 16-valve 2-door hatchback 900 4 cyl., 16-valve 2-door convertible 900 Turbo 4 cyl., 16-valve 2-door convertible 900 Turbo 6 cyl., 24-valve 2-door convertible 900 4 cyl., 16-valve Anti-Theft System Description-MY 1995 Saab 900 The system consists primarily of the following components and functions: Components Audible signal device Electronic control module Remote control (2) Lock assembly protective covers Door-mounted switches (4) Hood-mounted switch Hatch/trunk lid-mounted switch Light-emitting diode (LED-system status indicator light) Glass breakage sensor Anti-Theft system window warning label (2) Three circuit disengagement relay (starter motor, fuel pump, and ignition) Functions Central door/lock/unlock from driver and front passenger door locks Dead-bolt locking of all doors and hatch/trunk lid from driver's door lock Starter motor, fuel pump, and ignition disengagement with alarm activation Horn sounding with alarm activation. Turn signal indicator flashing with alarm activation Arm/disarm from remote control Hatch/trunk lid lock/unlock and temporary disarming of the alarm from the remote control Attachment I contains a wiring diagram depicting the Saab 900 anti-theft system circuitry and electric/electronic components. Attachment II depicts the location of the above-listed components. The vehicle depicted is the Saab 900 four-door hatchback. The two-door hatchback and convertible is identical to the four-door version, with the exception of the added rear passenger doors. Locking features for the rear passenger doors are identical to the front passenger locking features. The two-door convertible differs from the two-door hatchback only in that it has a conventional trunk, which is isolated from the passenger compartment by the rear seatbacks. Functional Description From the driver's, or front passenger's door lock, using the ignitiiion key or the remote control, the operator may activate or deactivate the central locking system by turning the key 45 degrees clockwise or counter-clockwise, respectively. In the locked position, all doors, including the hatch/trunk lid, are electro-mechanically locked. It is not possible to lock the doors while they are open (The lock plunger will not depress while the door is open); doors can only be locked from outside when the door is closed by using the ignition key in the door lock or the remote control. From the dirver's door lock only, if the key is turned an additional 45 degrees in the same direction and withdrawn from this position, the dead-bolt is activated. This means that the door handles and lock devices are disengaged in the locked position, forcing an intruder to crawl through a broken window in order to enter the vehicle. The operator can not activate or deactivate the dead-bolt feature from the remote control. From the left button on the remote control only, the alarm and immobilization features are armed. In armed condition, the vehicle doors, hatch/trunk, hood and windows are protected by the alarm system. If an attempt is made to enter the vehicle, an audible signal device (105-118 decibels) will sound for 30 seconds and the turn signals will flash for 300 seconds. If the alarm is disarmed within 30 to 300 second period, the horn is interrupted and the turn signal indicators cease flashing. If another trigger signal occurs (e.g., trunk) during this 30 or 300 second period, each function resets for another 30 or 300 second period, from the moment of retriggering. At the same time, the starter motor, the fuel-pump and the ignition systems are automatically disabled for 30 minutes. If a renewed attempt is made to enter the vehicle, all systems will again react as described above. The anti-theft alarm can be disarmed idefinitely from the left button on the remote control, or temporarily from the hatch/trunk lid, using the right button on the remote control. In the latter case, the alarm rearms automatically ten seconds after the hatch/trunk lid is again closed. In addition to the active systems described above, several passive anti-theft features further deter vehicle entry and theft. All door lock mechanisms are covered, and recessed inside the door, making it extremely difficult to unlock a door using an instrument slid down between the window and outer door skin. Furthermore, because the latch mechanism is located in the door, rather than in the B-pillar, it is much more difficult to unlatch the door using an instrument slid in between the door and B-or C-pillar. Also, the interior door lock plungers are of a design that is impossible to snag with a wire inserted between the weatherstip and window glass. Functional Description continued The Saab 900 ignition key and keylock, which is used to activate and deactivate the anti-theft system, are of a design unique to Saab, and are virtually impossible to "pick". The ignition key is also difficult to duplicate on the open market as a special blank, special key outlining equipment, and access to Saab key codes are required. Key blanks and codes are protected within the Saab corporate and dealer network. The radio is designed to be extremely difficult to remove without the use of a special extraction tool. Once disconnected from a power-source, the radio will not function again unless a unit-specific, four-digit access code is keyed in. The radio facia is also an uncommon size, making it impractical to install in a different model vehicle. A dash-mounted LED is used to indicate the various states of the alarm as follows: 1. Arming: The LED is lit for ten seconds. 2. Disarming: The LED is lit for one second. System triggered during arming procedure: The LED Blinks at half-second intervals for 10 secons. 4. System triggering input cancelled during arming procedure: The LED stops blinking, and remains lit for 10 seconds. 5. Disarming from hatch/trunk lid: The LED is lit for 10 seconds after unlocking the hatch/trunk lid, and again for 10 seconds after closing it. 6. Glass breakage sensor override switch (M95) activated (ignition on): Teh LED is off. 7. Glass breakage sensor override switch (M95) pressed continuously (ignition off): The LED blinks at half-second intervals for 10 seconds. 8. Glass breakage sensor, override switch (M95) activated (ignition off): The LED blinks at half-second intervals for 10 seconds. 9. Disarmed system: The LED is off. 10. Armed system: The LED blinks at 2 second intervals until the system is disarmed. 11. Activated system: The LED blinks at 2 second intervals until the system is disarmed. 12. Self-armed three circuit disengagement: The LED blinks at 2 second intervals until the system is disarmed. The system is protected against false activation from such common occurrences a shaiking or knockng, sound wave vibration, air turbulence, and temperature or light changes. In addition, the anti-theft system is equipped with a self-diagnostic system, which initiates a 10 second self-check function each time the system is armed. If a failure is detected, a fault code is stored, and the LED will blink for 10 seconds after arming the alarm (rather than remaining steadily lit for 10 seconds) as long as the code is left in the memory. Other system functions remain undisturbed. Diagnostic communication with the electronic control moduel can be initiated through the use of a special Saab Electronic diagnostic scanning tool when the alarm is unarmed. Saab Automobile 900 MY95 Alarm Immobilizer Parts list: 900 INDEX PART NAME SAAB PART NUMBER: %Q1. Horn assembly 44 93 443 2. El. unit anti-theft system 45 88 182 3. Window warning label 95 68 049 4. Theft security lock/unlock switch 43 27 292 5. C-lock/security lock motor driver side 43 26 773 6. C-lock/security lock motor passenger 43 26 781 side 7. C-lock/security lock motors right read 43 26 799 doors 8. Door switch driver and passenger door 44 08 423 9. Door switch rear doors 44 08 423 10. Hatch/trunk lid switch 44 08 423 11. Hood switch 43 23 259 12. Glass breakage sensor/lamp 45 50 869 Convertible (black) 45 50 851 13. Central lock unit 40 90 991 14. L.E.D. 40 90 991 15 Remote control 45 50 075 GP/abh Enclosures |
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ID: nht94-6.16OpenDATE: April 21, 1994 FROM: John Womack -- Acting Chief Counsel, NHTSA TO: Frank Williams -- President, Safety Brake Set TITLE: None ATTACHMT: Attached To Letter Dated 10/8/93 To NHTSA From Frank Williams (OCC-9219) TEXT: Dear Mr. Williams: This responds to your letter requesting information about Federal requirements related to a product that "sets the brakes on an air brake vehicle when the driver exits the cab." I apologize for the delay in our response. You stated that your "device does not hook into the brake system but pops the parking button out if the driver is off the seat and the door is open. The brake then must be manually disengaged." You requested confirmation that the agency will neither support nor oppose the aftermarket installation of such a device. I am pleased to have this opportunity to explain our regulations to you. I am also enclosing a copy of a fact sheet entitled "Information for New Manufacturers of Motor Vehicles and Motor Vehicle Equipment." By way of background information, the National Highway Traffic Administration (NHTSA) 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 vehicles or equipment comply with all applicable standards. The following represents our opinion based on the facts provided in your letter. NHTSA does not have any specific regulations about a product such as your device. However, since this device is related to a vehicle's air brake system, it could affect a vehicle's compliance with Standard No. 121, Air Brake Systems. That standard applies to almost all new trucks, buses, and trailers equipped with air brake systems. If your system is installed as original equipment on a new vehicle, the vehicle manufacturer is required to certify that, with the device installed, the vehicle satisfies the requirements of all applicable safety standards, including Standard No. 121. (See 15 U.S.C. @ 1397(a)(1) and 49 CFR Part 2 567). If the device is added to a previously certified new motor vehicle prior to its first consumer purchase, then the person who modifies the vehicle would be an alterer of a previously certified motor vehicle and would be required to certify that, as altered, the vehicle continues to comply with all of the safety standards affected by the alteration. 49 CFR @ 567.7. If the device is installed on a used vehicle by a manufacturer, distributor, dealer, or motor vehicle repair business, then the installer would not be required to attach a certification label. However, it would have to make sure that it did not knowingly render inoperative, in whole or in part, any device or element of design installed on or in a motor vehicle or item of motor vehicle equipment in compliance with an applicable Federal motor vehicle safety standard. 15 U.S.C. @ 1397(a)(2)(A). In particular, these entities should ensure that the installation of your device does not render inoperative the vehicle's compliance with the parking brake requirements set forth in S5.6. I hope this information is helpful. If you have any questions about NHTSA's safety standards, please feel free to contact Marvin-Shaw at this address or by telephone at (202) 366-2992. Sincerely, Enclosure |
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ID: nht94-6.17OpenDATE: April 21, 1994 FROM: Fred Carr -- Engineer, Utilimaster TO: John Womack -- Acting Chief Council, NHTSA TITLE: None ATTACHMT: Attached To Letter Dated 5/16/94 From John Womack To Fred Carr (A42; Std. 211) TEXT: Dear Mr. Womack, Please inform us as to whether Standard 571.211 applies to Motor Vehicle equipment relating to light duty, medium duty, and heavy duty trucks or truck manufacturers. Respectfully yours, |
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ID: nht94-6.18OpenDATE: April 21, 1994 FROM: John Womack -- Acting Chief Counsel, NHTSA TO: Gary Klingaman -- Engineer, Inter Pipe, Inc. TITLE: None ATTACHMT: Attached To Letter Dated 3/16/94 From Gary Klingaman To NHTSA Office Of Chief Counsel (OCC - 9833) TEXT: Dear Mr. Klingaman: This responds to your March 16, 1994, letter inquiring about the applicability of National Highway Traffic Safety Administration (NHTSA) regulations to the alteration of used motor vehicles. You stated that your company manufactures water trucks and lube/fuel service trucks by adding water tanks and various other apparatus to incomplete vehicles. Your question is whether you are required to add a certification label (as required in 49 C.F.R. @ 571.115) even if you use a "pre-owned" (I assume you mean "used") truck chassis. Some background information on Federal motor vehicle safety laws and regulations may be helpful. As you are aware, our agency is authorized under the National Traffic and Motor Vehicle Safety Act (15 U.S.C. @ 1381 et seg.; Safety Act), to issue safety standards applicable to new motor vehicles and certain items of motor vehicle equipment. NHTSA however does not approve motor vehicles or motor vehicle equipment, nor do we endorse any commercial products. Instead, the Safety Act establishes a "self-certification" process under which each manufacturer is responsible for certifying that its products meet all applicable safety standards. Whether Inter Pipe, Inc. would have to apply a certification label depends upon whether the vehicles your company modifies are new (that is, the vehicles have not yet been sold to the first retail purchaser) or used (vehicles that have already been sold to and used by the first retail purchaser). With respect to your company's modifications of new vehicles, your company would be a "final stage manufacturer" for the purposes of NHTSA's laws and regulations. 49 C.F.R. @ 568.6 requires a final stage manufacturer of a new vehicle to affix a certification label in accordance with 49 C.F.R. @ 567.5. The requirements of 49 C.F.R. Parts 567-568 do not apply if you modify used vehicles. Hence, your company is not 2 required to affix a manufacturer's label to those used vehicles you convert into water trucks or fuel/lube trucks. However, @ 108(a)(2)(A) of the Safety Act provides that no manufacturer, distributor, dealer, or motor vehicle repair business may knowingly "render inoperative," in whole or in part, any device or element of design installed on or in a motor vehicle or item of motor vehicle equipment in compliance with an applicable Federal motor vehicle safety standard. Therefore, you must be careful when adding your equipment not to degrade the truck's ability to meet the safety standards. For your information, I have enclosed a general information sheet for manufacturers that gives a thumbnail sketch of the relevant NHTSA regulations and explains how to get copies of those regulations. I hope this information is helpful. If you have any further questions or need some additional information on this subject, feel free to contact our office at (202) 366-2992. Enclosures |
Request an Interpretation
You may email your request to Interpretations.NHTSA@dot.gov or send your request in hard copy to:
The Chief Counsel
National Highway Traffic Safety Administration, W41-326
U.S. Department of Transportation
1200 New Jersey Avenue SE
Washington, DC 20590
If you want to talk to someone at NHTSA about what a request for interpretation should include, call the Office of the Chief Counsel at 202-366-2992.
Please note that NHTSA’s response will be made available in this online database, and that the incoming interpretation request may also be made publicly available.