2010 Mercedes Benz C 300 4MATIC (204.081) V6-3.0L (272.948)
A L L Diagnostic Trouble Codes ( DTC ): P Code Charts P2122
Check potentiometer of component B37 (Accelerator pedal sensor). all sensor 1 : Short circuit to ground or open circuit (P2122)
Test 1: Check component Accelerator pedal sensor.
Test 2: Possible cause:
- Accelerator pedal sensor Affected functions:
- Engine diagnosis - Engine output
1. Check component B37 (Accelerator pedal sensor).
Test 1.1: Check component Accelerator pedal sensor using actual value.
Test 1.2: Check power supply of component Accelerator pedal sensor.
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
1.2. 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 - --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
2010 Mercedes Benz C 300 4MATIC (204.081) V6-3.0L (272.948) Copyright ? 2013, ALLDATA 10.52SS Page 2
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
2. No further information available.
