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Home >> Toyota >> 2009 >> Tundra Base, 4.0 U >> Repair and Diagnosis >> External Pages >> Different car >> Section 249 (Engine Control System (2TR-FE)) >> SFI System >> DTC P0412 Secondary Air Injection System Switching Valve "A" Circuit >> Component Operating Range
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Component Operating Range

WARNING: This page is about a different car, the 2009 Toyota Tacoma. However, it is still accessible from the selected car via links, so may be relevant.
COMPONENT OPERATING RANGE CHART

Diagnostic signal duty ratio from air injection control driver 70% or more, and 90% or less when secondary air injection system operating.
0% when secondary air injection system not operating.