gf1420p2012te

Component description for the throttle valve actuator

Type gf · topic 14.20 · version 0103 · 2008-03-17

Applies to: ENGINE 646.8 in MODEL 204.0 /2 up to Model Year 8 ENGINE 646.8 in MODEL 211.0 /2 /6

Where it sits

Function group 1 Engine › 14 Exhaust manifold, engine brake, emission control system › 14.20 Exhaust gas recirculation — Series 204 (models 0**, 2**) · Series 211 (models 0**, 2**, 6**) · Series 646 (models 8**)

GF14.20-P-2012TE

Component description for the throttle valve actuator

18.12.06

ENGINE 646.8 in MODEL 204.0 /2 up to Model Year 8

ENGINE 646.8 in MODEL 211.0 /2 /6

Component description for the throttle valve actuator

Shown on engine 646.820

M16/5 Throttle valve actuator

Location

The throttle valve actuator is located at the front left underneath the intake pipe.

Task

The throttle valve actuator controls (restricts) the fresh air quantity supplied during exhaust gas recirculation (EGR).

P14.20-2224-03

Function

The throttle valve actuator is actuated by the CDI control unit (N3/9) by means of a pulse width modulated signal (PWM) signal and adjusted (closed) according to the throttle valve in the mixing chamber. This causes the amount of fresh air fed to the engine to be reduced (derated).

In a deenergized state, the throttle valve is opened by an integral return spring. If a fault is detected by the throttle valve actuator, the PWM signal is periodically switched to ground. The output driver in the CDI control unit can thus detect the fault.