Emission Testing Subaru:
The US EPA has exempted SUBARU Full-Time All-wheel-drive (AWD) vehicles from the following performance warranty short emission testing:
Idle Test With Loaded Preconditioning
The exemption language is specified on the under-hood Vehicle Emission Control Information (VECI) label.
State I/M Programs should test affected SUBARU Full-Time AWD models using any other EPA approved performance short test. SUBARU models with Full-Time AWD feature should be tested on a four-wheel drive dynamometer (State I/M Program may elect to use a “double two wheel dynamometer” arrangement). Under NO circumstances should any Subaru Full-Time AWD equipped vehicle be modified for I/M testing. This prohibition includes, but is not limited to:
• Jacking the rear wheels off the ground.
• Driveshaft disconnection, and/or
• Usage of the FWD fuse in the engine compartment. This fuse is for Full-Time 4WD or AWD diagnostic service purposes only.
For vehicles with the Traction Control System (TCS), the TCS off switch on the dash must be placed in the “off” position after starting the engine, but prior to any testing on the dynamometer.