7-6
At state inspection time, remember to tell your inspection or service
station in advance not to place your Subaru AWD vehicle on a two-
wheel dynamometer. Otherwise, serious transmission damage willresult.
Some states have started using d ynamometers in thei
r state insp ec tion
p rog rams in ord er to meet their ob lig ation und er fe d eral law to imp lement
stric ter vehic le emission stand ard s to red uc e air p ollution from c ars. A
d ynamometer is a tread mill or roller-like testing d evic e that allows your
c ar ’s wheels to turn while the c ar remains in one p lac e . Dep end ing on
the severity of a state ’s air p ollution p rob lems, the states must ad op t
either a “b asic ” or “enhanc ed ” vehic le emission insp ec tion test. Nor-
mally, a p ortion of the b asic emission test c onsist s of an emission
insp ec tor inserting an analyzer p rob e into the exha ust p ip e of an id ling
vehic le for a short p eriod of time. States with mor e severe air p ollution
p rob lems are req uired to ad op t an enhanc ed vehic le emission test. This
test simulates ac tual d riving c ond itions on a d ynam ometer and p ermits
more ac c urate measurement of tailp ip e emitted p ollu tion than the b asic
emission test.
The U.S. Environmental Protec tion Ag enc y (EPA) and states using two-
wheel d ynamometers in their emission testing p rog ra ms have
EXEMPTED Sub aru AWD vehic les from the p ortion of the testin g p ro-
g ram that involves a two-wheel d ynamometer.
There are some states that use four-wheel d ynamomet ers in their testing
p rog rams. When p rop erly used , that eq uip ment will n ot d amag e an AWD
Sub aru vehic le.
Und er no c irc umstanc es should the rear wheels b e ja c ked off the
g round , nor should the d riveshaft b e d isc onnec ted f or state emission
testing .