Internal fault in control unit (P0221)

Internal fault in control unit (P0221)
Internal fault in control unit (P0221)
Possible cause:
­ B37 (Accelerator pedal sensor)
­ N3/10 (ME­SFI [ME] control unit)
Affected functions:
­
Engine diagnosis
­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­­
Test 1: Test control unit.
Test 2: Check component B37 (Accelerator pedal sensor).
1. Test control unit.
Test control unit.
Possible cause and remedy
­
­
Erase fault memory and start engine.
Reread fault memory of control unit N3/10 (ME­SFI [ME] control unit).If fault reoccurs, replace component N3/10 (ME­SFI [ME]
control unit).
Read coding and transfer to the new control unit.End of test
2. Check component B37 (Accelerator pedal sensor).
Test 2.1: Check component B37 (Accelerator pedal sensor) using actual value.
Test 2.2: Check power supply of component B37 (Accelerator pedal sensor).
2.1. Check component B37 (Accelerator pedal sensor) using actual value.
Test sequence
­ Switch on ignition.
Status of the relevant actual values:
­ Idle speed detection:Warning!
­ Full load detection:Warning!
­ 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.?2010 Mercedes Benz E 63 AMG Sedan (212.077) V8­6.3L (156.985)
Copyright ? 2013, ALLDATA
10.52SS
Page 479
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 (ME­SFI [ME] control unit) to component B37 (Accelerator pedal sensor).
B37 (Accelerator pedal sensor)
2.2. Check power supply of component B37 (Accelerator pedal sensor).
Figure legend
­ A ­ConnectionTest cable 35­pin socket box
­ 001 ­Sockets of component N3/10 (ME­SFI [ME] control unit)
­ 05 ­35­pin socket box
­ 050 ­126­pin socket box
­ 108 ­Test cable 266 589 01 63 00
­ N3/10 (ME­SFI [ME] control unit)
­ II 1­63ConnectionTest cable
­ III 64­126ConnectionTest cable
Warning!
­
­
Connection A of test cable 108 may NOT be connected to connection B of the 126­pin socket box (050).
Test prerequisite
­ The actual value is not o.k.
­ The power supply of component N3/10 (ME­SFI [ME] control unit) is OK.
Test sequence
­
­
­
Switch off ignition.
Connect socket box (126­pin) to component N3/10 (ME­SFI [ME] control unit).
Measure direct voltage with multimeter between sockets [F.10] 106 and [F.23] 119 of the 126­pole socket box tester.2010 Mercedes Benz E 63 AMG Sedan (212.077) V8­6.3L (156.985)
Copyright ? 2013, ALLDATA
10.52SS
Page 480
­ Measure direct voltage with multimeter between sockets [F.11] 107 and [F.23] 119 of the 126­pole 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