2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 961

Test prerequisites

- The throttle flap of component M16/6 (Throttle valve actuator) should operate freely and must not stick or rub.

- At least one of the relevant actual values is not okay.

Test sequence

- Switch off ignition.

- Remove component B2/5 (Hot film mass air flow sensor).

- Disconnect coupling M at component N3/10 (ME-SFI [ME] control unit).

M16/6r3 (Actual value potentiometer (sliding contact 1))

- Measure resistance with multimeter between sockets (M.88) 88 and (M.43) 43 of the 126-pole socket box tester.

- Slowly operate throttle flap by hand up to full load.

Specified values

- Throttle valve not actuated[ca. 1380]ohms

- Throttle valve fully actuated[ca. 480]ohms

M16/6r4 (Actual value potentiometer (sliding contact 2))

- Measure resistance with multimeter between sockets (M.64) 64 and (M.43) 43 of the 126-pole socket box tester.

- Slowly operate throttle flap by hand up to full load.

Specified values

- Throttle valve not actuated[ca. 650]ohms

- Throttle valve fully actuated[ca. 1490]ohms

Question

- Are the measurement values OK?

YES

The measurement values are OK.Further possible causes of fault

- Test voltage supply of the potentiometers of component M16/6 (Throttle valve actuator).

NO

The measurement values are not OK.Possible cause and remedy

- Lines to component M16/6 (Throttle valve actuator)

- M16/6 (Throttle valve actuator)