[Code of Federal Regulations]
[Title 40, Volume 17]
[Revised as of July 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR86.132-90]

[Page 511-512]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 86_CONTROL OF EMISSIONS FROM NEW AND IN-USE HIGHWAY VEHICLES AND 
ENGINES--Table of Contents
 
 Subpart B_Emission Regulations for 1977 and Later Model Year New Light-
 
Sec. 86.132-90  Vehicle preconditioning.

    (a) The vehicle shall be moved to the test area and the following 
operations performed:
    (1) The fuel tank(s) shall be drained through the provided fuel 
tank(s) drain(s) and filled to the prescribed ``tank fuel volume'' with 
the specified test fuel, Sec. 86.113. For the above operations the 
evaporative emission control system shall neither be abnormally purged 
nor abnormally loaded.
    (2) Within one hour of being fueled the vehicle shall be placed, 
either by being driven or pushed, on a dynamometer and operated through 
one Urban Dynamometer Driving Schedule test procedure, see Sec. 86.115 
and appendix I. A test vehicle may not be used to set dynamometer 
horsepower.
    (3) For those unusual circumstances where additional preconditioning 
is desired by the manufacturer, such preconditioning may be allowed with 
the advance approval of the Administrator.

[[Page 512]]

    (4) The Administrator may also choose to conduct or require the 
conduct of additional preconditioning to insure that the evaporative 
emission control system is stabilized in the case of gasoline-fueled and 
methanol-fueled vehicles, or to insure that the exhaust system is 
stabilized in the case of petroleum-fueled, natural gas-fueled, 
liquefied petroleum gas-fueled and methanol-fueled diesel vehicles.
    (i) Gasoline-fueled and methanol-fueled vehicles. (A) The additional 
preconditioning shall consist of an initial one hour minimum soak and, 
one, two, or three driving cycles of the UDDS, as described in (a)(2) of 
this section, each followed by a soak of at least one hour with engine 
off, engine compartment cover closed and cooling fan off.
    (B) The vehicle may be driven off the dynamometer following each 
UDDS for the soak period.
    (ii) Petroleum-fueled diesel vehicles, natural gas-fueled and 
liquefied petroleum gas-fueled vehicles. The preconditioning shall 
consist of either of the following:
    (A) The additional preconditioning described in paragraph (a)(4)(i) 
of this section; or
    (B) For abnormally treated vehicles, as defined in Sec. 86.085-2, 
two Highway Fuel Economy Driving Schedules, found in part 600 appendix 
I, run in immediate succession, with the road load power set at twice 
the value obtained from Sec. 86.129-80.
    (b) Within five minutes of completion of preconditioning, the 
vehicle shall be driven off the dynamometer and parked. The vehicle 
shall be stored for not less than 12 hours nor for more than 36 hours 
prior to the cold start exhaust test. (Gasoline-fueled and methanol-
fueled vehicles undergo a one-hour diurnal heat build prior to the cold 
start exhaust test. A wait of up to one hour is permitted between the 
end of the diurnal heat build and the beginning of the cold start 
exhaust test. See Sec. 86.130 and Figure B79-5.)
    (c) Vehicles to be tested for evaporative emissions shall be 
processed in accordance with procedures in Sec. Sec. 86.133 through 
86.138. Vehicles to be tested for exhaust emissions only shall be 
processed according to Sec. 86.133 through Sec. 86.137.

[54 FR 14527, Apr. 11, 1989, as amended at 59 FR 48509, Sept. 21, 1994]