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b. By Electronic Throttle Control IC.3.3 Throttle Actuation – Mechanical IC.3.3.1 The throttle cable or rod must:
a. Have smooth operation
b. Have no possibility of binding or sticking.
c. Be minimum 50 mm from any exhaust system component and out of the exhaust stream.
d. Be protected from being bent or kinked by the driver’s foot when it is operated by the
driver or when the driver enters or exits the vehicle.
IC.3.3.2 The throttle actuation system must use two or more return springs located at the throttle body, so that the failure of any component of the throttle system will not prevent the throttle returning to the closed position.
Throttle Position Sensors (TPS) are NOT acceptable as return springs.