2010 Mercedes Benz C 300 (204.054) V6-3.0L (272.947) Page 289

1. Learning of the throttle valve stop

Warning!Communication with ECU required.

0217

M16/6 (Throttle valve actuator) : The throttle valve is jamming or is stiff. (P2176)

Possible cause:

- M16/6 (Throttle valve actuator)

Affected functions:

- Engine diagnosis

- Engine running

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Test 1: Check component M16/6 (Throttle valve actuator).

1. Check component M16/6 (Throttle valve actuator).

Test 1.1: Check component M16/6 (Throttle valve actuator) using actual value.

Test 1.2: Check component M16/6m1 (Actuator motor) by means of actuation.

Test 1.3: Perform mechanical inspection of component M16/6 (Throttle valve actuator).

Test 1.4: Note : Control unit programming must be performed on control unit variants VC6 to VC8.

1.1. Check component M16/6 (Throttle valve actuator) using actual value.

Warning!Communication with ECU required.

1.2. Check component M16/6m1 (Actuator motor) by means of actuation.

Test prerequisite

- Operate engine at idling speed.

Note

- If the throttle valve angle is< 1,1锟斤拷, unmetered air may be present.

Status of relevant actual value:

- Throttle valve angle:Warning! Communication with ECU required.

Move on to actuation with button F2

1.3. Perform mechanical inspection of component M16/6 (Throttle valve actuator).

Test sequence

- Switch off ignition.

- Expose component M16/6 (Throttle valve actuator).

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

Specified value

- The throttle valve must not stick and must close by internal spring force.

Question

- Is the test o.k?

YES

The test is o.k..End of test

NO

The test is not o.k..Possible cause and remedy

- Check intake tract for residue and clean if necessary.If no residue is present, replace component M16/6 (Throttle valve actuator).