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In 1975, Toyota introduced the TTC-L (Toyota Total Clean-Lean Burn) on the 12T engine only, using a lean burn implementation. in 1976, Toyota introduced the TTC-C (Toyota total clean-Catalyst) on the 3K-U engine, using single bed catalytic converter and lambda close-loop oxygen sensor with a supercharger smog pump.
Toyota also referred to an earlier lean-burn system as "Turbulence Generating Pot" (TGP). TTC-L was used in Japan on Toyota Carina T150 replacing the TTC-V (Vortex) exhaust gas recirculation approach used earlier, Toyota Corolla E80, and Toyota Sprinter. The lean mixture sensor was provided in the exhaust system to detect air–fuel ratios ...
[citation needed] Volvo had a light labeled "lambda", lambda sond being another name for oxygen sensor. This was done in order to remind the driver to change the oxygen sensor. Some American-built 1973–1976 Chrysler Corporation vehicles had a similar odometer-triggered reminder: "Check EGR", which was reset after service at a Chrysler dealership.
OBD-II PIDs (On-board diagnostics Parameter IDs) are codes used to request data from a vehicle, used as a diagnostic tool.. SAE standard J1979 defines many OBD-II PIDs. All on-road vehicles and trucks sold in North America are required to support a subset of these codes, primarily for state mandated emissions inspections.
The Toyota Corolla (Japanese: トヨタ・カローラ, Hepburn: Toyota Karōra) is a series of compact cars (formerly subcompact) manufactured and marketed globally by the Japanese automaker Toyota Motor Corporation. Introduced in 1966, the Corolla was the best-selling car worldwide by 1974 and has been one of the best-selling cars in the ...
MAP sensor data can be converted to air mass data by using a second variable coming from an IAT Sensor (intake air temperature sensor). This is called the speed-density method. Engine speed (RPM) is also used to determine where on a look up table to determine fuelling, hence speed-density (engine speed / air density).