2010 Mercedes Benz C 300 4MATIC (204.081) V6-3.0L (272.948)
A L L Diagnostic Trouble Codes ( DTC ): P Code Charts M166 (Throttle valve actuator) : Position Throttle valve (P2101)
M166 (Throttle valve actuator) : Position Throttle valve (P2101)
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 M166 (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: Check internal resistance of component M16/6m1 (Actuator motor).
Test 1.4: Perform mechanical inspection of component M16/6 (Throttle valve actuator).
1.1. Check component M166 (Throttle valve actuator) using actual value. Warning!Communication with EC reuired.
1.2. Check component M166m1 (Actuator motor) by means of actuation. Test prerequisite
- Operate engine at idling speed. Note
- If the throttle valve angle is 11 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. Check internal resistance of component M166m1 (Actuator motor). Figure legend
- A -ConnectionTest cable 35-pin socket box - 001 -Sockets of component N3/10 (ME-SFI [ME] control unit) - 05 -35-pin socket box - 050 -126-pin socket box - 108 -Test cable 266 589 01 63 00 - N3/10 (ME-SFI [ME] control unit) - II 1-63ConnectionTest cable - III 64-126ConnectionTest cable Warning!
- Connection A of test cable 108 may NOT be connected to connection B of the 126-pin socket box (050). Continue to test with button F2
2010 Mercedes Benz C 300 4MATIC (204.081) V6-3.0L (272.948) Copyright ? 2013, ALLDATA 10.52SS Page 2
Test sequence
- Switch off ignition. - isconnect coupling M at component N3/10 (ME-SFI [ME] control unit). - Measure resistance with multimeter between sockets (M.75) 75 and (M.74) 74 of the 126-pole socket box tester. Specified value
- esistor[1...10]ohms Question
- Is the measurement value OK?
YES The measurement value is OK.End of test
NO The measurement value is not OK.Possible cause and remedy
- ines between N3/10 (ME-SFI [ME] control unit) and M16/6m1 (Actuator motor) - M16/6m1 (Actuator motor) End of test
1.4. Perform mechanical inspection of component M166 (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..Possible cause and remedy
- N3/10 (ME-SFI [ME] control unit) End of test
2010 Mercedes Benz C 300 4MATIC (204.081) V6-3.0L (272.948) Copyright ? 2013, ALLDATA 10.52SS Page 3
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).
