AUTOMATIC TEMPERATURE CONTROL (A.T.C.) SYSTEM
EF & EC-662prose procedureThe automatic temperature control system maintains the temperature of air sucked in the carburetor within a constant range, thereby enabling lean setting for carburetor calibration. In addition to this, the automatic temperature control system is effective in improving warm-up characteristics of the engine and to prevent carburetor from icing.
Operation
A.T.C. System Operation
Below 38 (100)
Temperature sensor OperationClosed
Intake manifold vacuum kPa (mbar, mmHg, inHg)Above 25.3 (253, 190, 7.48)
Vacuum motor OperationRaised
Inlet airHot
Below 38 (100)
Temperature sensor OperationClosed
Intake manifold vacuum kPa (mbar, mmHg, inHg)8.0 - 25.3 (80 - 253, 60 - 190, 2.36 - 7.48)
Vacuum motor OperationPartially raised
Inlet airCold + Hot
Below 38 (100)
Temperature sensor OperationClosed
Intake manifold vacuum kPa (mbar, mmHg, inHg)Below 8.0 (80, 60, 2.36)
Vacuum motor OperationDown
Inlet airCold
Above 55 (131)
Temperature sensor OperationOpen
Intake manifold vacuum kPa (mbar, mmHg, inHg)Any value
Vacuum motor OperationDown
Inlet airCold