2010 Mercedes Benz C 300 4MATIC (204.081) V6-3.0L (272.948)
A L L Diagnostic Trouble Codes ( DTC ): P Code Charts The safety fuel shutoff is active. (P2176)
The safety fuel shutoff is active. (P2176)
Possible cause:
- 1 Throttle valve actuator Affected functions:
- Engine diagnosis - Engine running
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Test 1: Check component 1 Throttle valve actuator.
1. Check component M166 (Throttle valve actuator).
Test 1.1: Check component Accelerator pedal sensor.
Test 1.2: Check component 1 Throttle valve actuator.
Test 1.: Perform mechanical inspection of component 1 Throttle valve actuator.
1.1. Check component B37 (Accelerator pedal sensor).
Test 1.1.1: Check component Accelerator pedal sensor using actual value.
Test 1.1.2: Check power supply of component Accelerator pedal sensor.
1.1.1. Check component B37 (Accelerator pedal sensor) using actual value. Test seuence
- witch on ignition. tatus of the relevant actual values: - Pedal value sensor oltage 1:Warning! Communication with EC reuired. - Pedal value sensor oltage 2:Warning! Communication with EC reuired. pecified values
- Accelerator pedal position:Idle speed - Accelerator pedal sensorignal1 : .2.... - Accelerator pedal sensorignal2 : .1....
- Accelerator pedal position:ickdown - Accelerator pedal sensorignal1 : ..... - Accelerator pedal sensorignal2 : 2.1...2. uestion
- Are the actual values o.k.
ES The actual values are okay.End of test
N The actual values are not okay.Possible cause and remedy
- Check power supply of component Accelerator pedal sensor. - Check lines from component N1 E-FI E control unit to component Accelerator pedal sensor. - Accelerator pedal sensor
1.1.2. Check power supply of component B37 (Accelerator pedal sensor). Figure legend
- A -ConnectionTest cable -pin socket bo - 1 -ockets of component N1 E-FI E control unit
2010 Mercedes Benz C 300 4MATIC (204.081) V6-3.0L (272.948) Copyright ? 2013, ALLDATA 10.52SS Page 2
- --pin socket bo - -12-pin socket bo - 1 -Test cable 2 1 - N1 E-FI E control unit - II 1-ConnectionTest cable - III -12ConnectionTest cable arning
- Connection A of test cable 1 may NOT be connected to connection of the 12-pin socket bo . Continue to test with button F2
Test prereuisite
- The actual value is not o.k. - The power supply of component N1 E-FI E control unit is O. Test seuence
- witch off ignition. - Connect socket bo 12-pin to component N1 E-FI E control unit. - easure direct voltage with multimeter between sockets F.11 1 and F.2 11 of the 12-pole socket bo tester. - witch on ignition. pecified value
- oltage.....2 uestion
- Are the measurement values O
ES The measurement values are O.Further possible causes of fault
- ignal lines - Accelerator pedal sensor End of test
N The measurement values are not O.Possible cause and remedy
- Cable for voltage supply End of test
1.2. Check component M166 (Throttle valve actuator).
2010 Mercedes Benz C 300 4MATIC (204.081) V6-3.0L (272.948) Copyright ? 2013, ALLDATA 10.52SS Page 3
Test 1.2.1: Check component 1 Throttle valve actuator using actual value.
Test 1.2.2: Check component 1m1 Actuator motor by means of actuation.
1.2.1. Check component M166 (Throttle valve actuator) using actual value. Warning!Communication with ECU required.
1.2.2. Check component M166m1 (Actuator motor) by means of actuation. Test prereuisite
- Operate engine at idling speed. Note
- If the throttle valve angle is 1,1, unmetered air may be present. tatus of relevant actual value: - Throttle valve angle:Warning! Communication with EC reuired. ove on to actuation with button F2
1.3. Perform mechanical inspection of component M166 (Throttle valve actuator). Test seuence
- witch off ignition. - Epose component 1 Throttle valve actuator. - lowly operate throttle flap by hand up to full load. pecified value
- The throttle valve must not stick and must close by internal spring force. uestion
- Is the test o.k
ES The test is o.k..End of test
N 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 1 Throttle valve actuator.
