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) : Actual value potentiometer 1 or 2 has failed. (P2135)
M166 (Throttle valve actuator) : Actual value potentiometer 1 or 2 has failed. (P2135)
Possible cause:
- M16/6 (Throttle valve actuator) Affected functions:
- Engine diagnosis - Engine output
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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: Test voltage supply of the potentiometers of component M16/6 (Throttle valve actuator).
1.1. Check component M166 (Throttle valve actuator) using actual value. Warning!Communication with ECU required.
1.2. 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
- oltage[4.75...5.25] Question
- Is the measurement value OK?
YES 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
