Interpretation ID: nht91-7.44

DATE: December 10, 1991

FROM: Barry Felrice -- Associate Administrator for Rulemaking, NHTSA

TO: Paul Jackson Rice -- Chief Counsel, NHTSA

TITLE: ACTION: General Motors Modified Antitheft Petition

ATTACHMT: Attached to USG 2846 Part III dated 11/18/91 from Robert Rogers to Barry Felrice; Also attached to letter dated 2/7/92 from Paul Jackson Rice to Robert A. Rogers (A39; Part 543)

TEXT:

On November 18, 1991, General Motors Corporation (GM) submitted a letter informing NHTSA of a change in the "PASS-KEY" antitheft system that was installed on the My 1992 Pontiac Bonneville. (GM discovered, through a review, that the information of the second generation "PASS-KEY" had not been forwarded to the agency.) Since the initial petition for the MY 1992 Pontiac Bonneville, but before the start of production, of the MY 1992 Bonneville, a design change had been made to include GM's second generation "PASS-KEY II" theft deterrent system, as standard equipment on this car line and not the original "PASS-KEY" system as described in the petition. GM had previously been granted a partial exemption on the original "PASS-KEY" system for the MY 1992 Bonneville.

Rulemaking has reviewed the changes to the system, and finds that the differences between the "PASS-KEY II" and the original "PASS-KEY," as described below, would qualify for de minimis treatment.

GM has changed the system in which the shut down period of the system would be for three minutes plus or minus 18 seconds, instead of the previous 2 to 4 minutes. GM believes that this is more precise than the prior system. The other change in the system is that the "PASS-KEY II" timer does not reset back to zero if further resistance comparisons are attempted while the decoder module is shut down. GM states that this functional difference will still provide a similar level of theft deterrent performance since the decoder module while in the shut down mode, will ignore any further attempts to start the vehicle by means of a key with an improper pellet resistance during that time, and continuous attempts will result in the module remaining inoperative until the proper key is used.

As stated above, Rulemaking does not believe that these changes are significant enough to warrant submission of a full modification petition by GM and, therefore, would qualify for de minimis treatment. Accordingly, Rulemaking requests a letter granting the change to the antitheft system be forwarded to GM, pursuant to Part 543.9 (j).

Attachment

USG 2846 Part III dated 11/18/91 from Robert A. Rogers to Barry Felrice. (Text omitted)