2010 Mercedes Benz C 300 4MATIC (204.081) V6-3.0L (272.948) A L L Diagnostic Trouble Codes ( DTC ): P Code Charts P2128

2010 Mercedes Benz C 300 4MATIC (204.081) V6-3.0L (272.948)      
A L L  Diagnostic Trouble Codes ( DTC ): P Code Charts P2128
Check potentiometer of component B37 (Accelerator pedal sensor). Hall sensor 2 : Short circuit to positive (P2128)

Possible cause:
- B37 (Accelerator pedal sensor) Affected functions:
- Engine diagnosis - Engine output

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  Test 1: Check component B37 (Accelerator pedal sensor).
1. Check component B37 (Accelerator pedal sensor).
  Test 1.1: Check component B37 (Accelerator pedal sensor) using actual value.
  Test 1.2: Check power supply of component B37 (Accelerator pedal sensor).
1.1. Check component B37 (Accelerator pedal sensor) using actual value. Test sequence
- Switch on ignition. Status of the relevant actual values: - B37 (Pedal value sensor) Voltage 1:Warning! Communication with ECU required. - B37 (Pedal value sensor) Voltage 2:Warning! Communication with ECU required. Specified values
- Accelerator pedal position:Idle speed - B37 (Accelerator pedal sensor)Signal1 : [0.2...0.5] V - B37 (Accelerator pedal sensor)Signal2 : [0.1...0.5] V
- Accelerator pedal position:Kickdown - B37 (Accelerator pedal sensor)Signal1 : [4.3...4.8] V - B37 (Accelerator pedal sensor)Signal2 : [2.1...2.5] V Question
- Are the actual values o.k.?

YES The actual values are okay.End of test
NO The actual values are not okay.Possible cause and remedy
- Check power supply of component B37 (Accelerator pedal sensor). - Check lines from component N3/10 (ME-SFI [ME] control unit) to component B37 (Accelerator pedal sensor). - B37 (Accelerator pedal sensor)

1.2. Check power supply of component B37 (Accelerator pedal sensor). 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!
2010 Mercedes Benz C 300 4MATIC (204.081) V6-3.0L (272.948)       Copyright ? 2013, ALLDATA     10.52SS        Page 2
- 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

Test prerequisite
- The actual value is not o.k. - 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 [F.11] 107 and [F.23] 119 of the 126-pole socket box tester. - Switch on ignition. Specified value
- Voltage[4.75...5.25] V Question
- Are the measurement values OK?

YES The measurement values are OK.Further possible causes of fault
- Signal lines - B37 (Accelerator pedal sensor) End of test
NO The measurement values are not OK.Possible cause and remedy
- Cable for voltage supply End of test