Fault of priority 1: fault of function monitor in electronic accelerator (P0221)
Fault of priority 1: fault of function monitor in electronic accelerator (P0221)
Possible cause:
- B37 (Accelerator pedal sensor)
Affected functions:
- Engine diagnosis
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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 prerequisites
- Relevant fault code exists or there is a complaint.
Test sequence
- Switch on ignition.
Status of the relevant actual values:
- B37 (Accelerator pedal sensor) Signal 1:Warning! Communication with ECU required.
- B37 (Accelerator pedal sensor) Signal 2:Warning! Communication with ECU required.
Specified values
- Accelerator pedal position:Idle speed
- B37 (Accelerator pedal sensor)Signal 1):[0.2...0.5] V
- B37 (Accelerator pedal sensor)Signal 2):[0.1...0.4] V
- Accelerator pedal position:Kickdown
- B37 (Accelerator pedal sensor)Signal 1:[4.1...4.7] V
- B37 (Accelerator pedal sensor)Signal 2:[2.0...2.4] V
Question
- Are the actual values o.k.?
YES
The actual values are okay.Possible cause and remedy
- This test did not produce any clear result.
- Conduct further checks on component B37 (Accelerator pedal sensor).
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)
1.1. No further information available.
1.2. Check power supply of component B37 (Accelerator pedal sensor).
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 (4.16) 101 and (4.04) 89 of the 126-pole socket box tester.
- Measure direct voltage with multimeter between sockets (4.17) 102 and (4.04) 89 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
- N3/10 (ME-SFI [ME] control unit)
End of test