AUTOMATIC TEMPERATURE CONTROL (A.T.C.) AIR CLEANER SYSTEM
EF & EC-192prose procedureApplies to GA13DS, GA14DS & GA16DS.
System Description (Cont'd)
When the engine is warmed up, the A.T.C. temperature sensor releases to the atmosphere the intake manifold vacuum leading to the vacuum motor. Therefore, the vacuum motor deactivates. In this step, the air control valve shuts off hot air, allowing normal temperature air to flow to the air cleaner.
Operation
Operation
Below 38 (100)
Temperature sensor — OperationClosed
Vacuum motor — Intake manifold vacuum -kPa (-mbar, -mmHg, -inHg)Above 16.7 (167, 125, 4.92)
Vacuum motor — OperationRaised
Inlet airHot
Below 38 (100)
Temperature sensor — OperationClosed
Vacuum motor — Intake manifold vacuum -kPa (-mbar, -mmHg, -inHg)4.7 - 16.7 (47 - 167, 35 - 125, 1.38 - 4.92)
Vacuum motor — OperationPartially raised
Inlet airCold + Hot
Below 38 (100)
Temperature sensor — OperationClosed
Vacuum motor — Intake manifold vacuum -kPa (-mbar, -mmHg, -inHg)Below 4.7 (47, 35, 1.38)
Vacuum motor — OperationDown
Inlet airCold
Above 48 (118)
Temperature sensor — OperationOpen
Vacuum motor — Intake manifold vacuum -kPa (-mbar, -mmHg, -inHg)Any value
Vacuum motor — OperationDown
Inlet airCold
Inspection
AIR CLEANER FILTER (Viscous paper type)
Viscous paper type air cleaner filter does not need cleaning between renewals. The filter should never be brushed or blasted because both cause clogging and enrich the mixture ratio.
AUTOMATIC TEMPERATURE CONTROL SYSTEM
Engine stall or hesitation; Increase in fuel consumption; Lack of power. If these phenomena occur, check A.T.C. system before inspecting carburetor.
Automatic Temperature Control System Inspection
- 1Check hoses for cracks, distortion and improper position.
SEF747H - 2Check A.T.C. system for proper function while engine is cool. Check air control valve position. Air control valve is correct if it is in the lower position.