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) : Output stage (P2101)
M166 (Throttle valve actuator) : Output stage (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 M16/6m1 (Actuator motor) by means of actuation.
Test 1.2: Check internal resistance of component M16/6m1 (Actuator motor).
Test 1.3: Test voltage supply of the potentiometers of component M16/6 (Throttle valve actuator).
1.1. 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
1.2. 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
1.3. Test voltage supply of the potentiometers of component M166 (Throttle valve actuator). Test prerequisite
- At least one of the relevant actual values is not okay. - The power supply of component N3/10 (ME-SFI [ME] control unit) is OK. Test sequence
- Switch off ignition. - Connect socket box (126-pin) to component N3/10 (ME-SFI [ME] control unit). - Measure direct voltage with multimeter between sockets (M.39) 39 and (M.43) 43 of the 35-pole socket box tester. - Switch on ignition. Specified value
- Voltage[4.75...5.25] V Question
- Is the measurement value OK?
YES
2010 Mercedes Benz C 300 4MATIC (204.081) V6-3.0L (272.948) Copyright ? 2013, ALLDATA 10.52SS Page 3
The measurement value is OK.Possible cause and remedy
- Check lines from component M16/6 (Throttle valve actuator) to component N3/10 (ME-SFI [ME] control unit). End of test
NO The measurement value is not OK.Possible cause and remedy
- N3/10 (ME-SFI [ME] control unit) End of test
