P1184

Y81 (Cylinder Shut-off Valve, Left Bank of Cylinders)

Check Component Y81 (Cylinder Shut-off Valve, Left Bank of Cylinders) (only CSO)

Test requirement
- Fault code 'P1666' present

NOTE
Fault code P1666 may be caused by incorrect mass air flow measurement.
Check the entire air intake system (air cleaner, HFM-SFI mass air flow sensor) for correct installation (unmetered air).

Guided tests ( Operate pushbutton F2. )

Test 1 Test Actuation of Component Y81 (Cylinder Shut-off Valve, Left Bank of Cylinders)
Test 2 Test Current Consumption of Component Y81 (Cylinder Shut-off Valve, Left Bank of Cylinders)


1 Test Actuation of Component Y81 (Cylinder Shut-off Valve, Left Bank of Cylinders)

Test requirement
- No fault regarding engine misfiring ( P0300, P0301,..) present
- Coolant temperature: > °C

Test sequence
- Switch off ignition.
- Connect socket box to component N3/10 (ME-SFI control module).
- (E.9) 65 <--> 2 (A.2)
- Note: Detach the socket at the component A7/3 (Traction system hydraulic unit).
- Engage gear D.925 1/min 3500 1/min Drive vehicle on roller dynamometer in gear 5 at an engine speed of ...%3% and low load. Ease off throttle if necessary.

Status of the relevant actual values:
- Temperature of coolant: Note! Communication with ECU required
- Engine speed: Note! Communication with ECU required

Specified value
- Briefly [11.0...14.5] V, then [5.0...6.0] V
- Note: Component Y81 (Cylinder shut-off valve, left bank of cylinders) is actuated clocked.

Question
- Is the measured value okay?
Yes
The measured value is o.k.
Note
- This test did not produce any clear result.
- Select further tests.
No
The measured value is not o.k.
Possible cause and remedy
- Test current consumption of component Y81 (Cylinder shut-off valve, left bank of cylinders) .
- Leads to component Y81 (Cylinder shut-off valve, left bank of cylinders)
- N3/10 (ME-SFI control module)

** End of Test **


2 Test Current Consumption of Component Y81 (Cylinder Shut-off Valve, Left Bank of Cylinders)

Test sequence
- Switch off ignition.
- Connect socket box to component N3/10 (ME-SFI control module).
- (A.3) 3 <--> 65 (E.9)
- Switch on ignition.

Note: Perform the measurement only for a short time so that component Y81 (Cylinder shut-off valve, left bank of cylinders) does not overheat.

Specified value
- Component Y81 (Cylinder shut-off valve, left bank of cylinders) is heard to operate.
- Amperage [1.4...1.8] A

Question
- Is the measured value okay?
Yes
The measured value is o.k. ** End of Test **
No
The measured value is not o.k.
Possible cause and remedy
- Voltage supply of component Y81 (Cylinder shut-off valve, left bank of cylinders)
- Leads to component Y81 (Cylinder shut-off valve, left bank of cylinders)
- Y81 (Cylinder shut-off valve, left bank of cylinders)

** End of Test **