12 72 010 Removing And Installing/Replacing Throttle Actuator (S54)

Turn off ignition.

Remove intake air manifold. Refer to 11 61 050 REMOVING AND INSTALLING INTAKE AIR MANIFOLD (S54) .

Press lock together and detach air hose (1) from air pipe (2).

Fig 1: Pressing Lock Together And Detaching Air Hose From Air Pipe

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Unhook pull rod (1) from ball head on servomotor side.

Fig 2: Unhooking Pull Rod From Ball Head On Servomotor Side

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Unlock plug (1) and detach from throttle actuator (2).

Fig 3: Unlocking Plug And Detaching From Throttle Actuator

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Release nuts and lay idle-speed control valve (1) to one side to gain access to screw connection of cable duct.

Fig 4: Removing Idle-Speed Control Valve

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Release screw and remove manifold support (1).

Installation:

In order to avoid torsion stress on manifold, secure manifold support with screw but do not tighten down screw. Only tighten down screw when manifold is mounted on throttle assembly.

Fig 5: Removing Manifold Support

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Release screws.

Lay cable duct (1) to one side.

Fig 6: Removing Cable Duct

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Release screws (1).

Remove throttle actuator (2).

Installation:

Adjust full-load stop after installing throttle actuator. Adjusting the full-load stop is described in 13 54 010 ADJUSTING BASIC THROTTLE SETTING (S54) .

Fig 7: Removing Throttle Actuator

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Installation:

Check adapter sleeves (1) for damage and correct installation position.

Fig 8: Identifying Adapter Sleeves For Checking

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CAUTION: After working on throttle system (throttle assembly, servomotor, potentiometer), carry out electronic throttle test with DIS Tester or MoDiC without fail:

Service functions.
DME system checks.
Function test.

NOTE: Interrogate fault memory of DME control unit. Check stored fault messages. Rectify faults. Then clear fault memory.