P208E

Y81/1 (Cylinder shutoff valve for cylinders 10-12) , Electrical fault

Test 1: Check component Y81/1 (Cylinder shutoff valve for cylinders 10-12).

1. Check component Y81/1 (Cylinder shutoff valve for cylinders 10-12).

Test 1.1: Test actuation of component Y81/1 (Cylinder shutoff valve for cylinders 10-12).

Test 1.2: Test current consumption of component Y81/1 (Cylinder shutoff valve for cylinders 10-12).

1.1. Test actuation of component Y81/1 (Cylinder shutoff valve for cylinders 10-12).
Test prerequisite

- No fault regarding engine misfiring (P2043, P2050,..) present
- Coolant temperature:>° C
Test sequence

- Switch off ignition.
- Connect socket box (35-pin) to component N3/10 (ME-SFI [ME] control unit).
- Connect socket box (126-pin) to component N3/10 (ME-SFI [ME] control unit).
- Measure direct voltage with multimeter between socket (5.5) 5 of the 35-pole socket box tester and socket (3.27) 60 of the 126-pole socket box tester.
- Measure direct voltage with multimeter between socket (5.5) 5 of the 35-pole socket box tester and socket (3.41) 74 of the 126-pole socket box tester.
- Warning! Detach coupling at component A7/3 (Traction system hydraulic unit).
- Engage gear D.Drive vehicle on roller dynamometer in gear 5 at an engine speed of 925 1/min...3500 1/min and low load.Ease off throttle if necessary.
Status of the relevant actual values:
- Temperature of coolant:Warning! Communication with ECU required.
- Engine speed:Warning! Communication with ECU required.
- Y80/1 (Cylinder shutoff valve for cylinders 7-9) , Inlet valves:Warning!
- Y81/1 (Cylinder shutoff valve for cylinders 10-12) , Inlet valves:Warning!
- Y80/1 (Cylinder shutoff valve for cylinders 7-9) , Exhaust valves:Warning!
- Y81/1 (Cylinder shutoff valve for cylinders 10-12) , Exhaust valves:Warning!
Specified value

- Briefly [11.0...14.5] V, then [5.0...6.0] V
- Component Y81/1 (Cylinder shutoff valve for cylinders 10-12) is actuated clocked.
Question

- Is the measurement value OK?


YES
The measurement value is OK.Note

- This test did not produce any clear result.
- Select further tests.


NO
The measurement value is not OK.Possible cause and remedy

- Test current consumption of component Y81/1 (Cylinder shutoff valve for cylinders 10-12).
- Lines to component Y81/1 (Cylinder shutoff valve for cylinders 10-12)
- N3/10 (ME-SFI [ME] control unit)
End of test

1.2. Test current consumption of component Y81/1 (Cylinder shutoff valve for cylinders 10-12).
Test current consumption of component Valve for cylinder shutoff.
Test sequence

- Switch off ignition.
- Connect socket box (35-pin) to component N3/10 (ME-SFI [ME] control unit).
- Connect socket box (126-pin) to component N3/10 (ME-SFI [ME] control unit).
- Measure direct current with multimeter between socket (5.5) 5 of the 35-pole socket box tester and socket (3.27) 60 of the 126-pole socket box tester.
- Measure direct current with multimeter between socket (5.5) 5 of the 35-pole socket box tester and socket (3.41) 74 of the 126-pole socket box tester.
- Switch on ignition.
Warning!Perform the measurement only for a short time so that component Y81/1 (Cylinder shutoff valve for cylinders 10-12) does not overheat.Specified value

- Component Y81/1 (Cylinder shutoff valve for cylinders 10-12) is heard to operate.
- Amperage[1.0...3.5] A
Question

- Is the measurement value OK?


YES
The measurement value is OK.End of test

NO
The measurement value is not OK.Possible cause and remedy

- Voltage supply of component Y81/1 (Cylinder shutoff valve for cylinders 10-12)
- Lines to component Y81/1 (Cylinder shutoff valve for cylinders 10-12)
- Y81/1 (Cylinder shutoff valve for cylinders 10-12)
End of test