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Home >> Land Rover >> 2018 >> Range Rover Velar First Edition >> Repair and Diagnosis >> Engine Mechanical >> Blowers, Superchargers & Turbochargers >> Fuel Charging And Controls - Turbocharger - TDV6 3.0L Diesel -- Range Rover Velar/L560 >> Fuel Charging And Controls - Turbocharger - TDV6 3.0L Diesel >> Diagnosis And Testing >> Turbocharger (G1426632) >> Pinpoint Tests >> Pinpoint Test A: Vacuum Control System Tests - Twin Turbocharger Variants Only

Pinpoint Test A: Vacuum Control System Tests - Twin Turbocharger Variants Only

  1. A1: VACUUM VENT HOSE TEST 1 
    1. With the ignition switched off, disconnect the vacuum vent hose from the air filter housing at point TP1
    2. Connect a hand operated vacuum pump into the circuit at point TP1 and apply a vacuum

      Can a vacuum be achieved and maintained?

      Yes: GO to A2  .

      No:  Air leak, complete a smoke test to identify the leak point. If a leak is identified, repair fault and repeat step  1 to confirm repair

  2. A2: VACUUM VENT HOSE TEST 2 
    1. Disconnect the vacuum vent hose from the turbine intake shut-off valve solenoid at point TP2
    2. Connect the vacuum pump to the vent hose at point TP2 and apply a vacuum

      Can a vacuum be achieved?

      Yes:  Check the vacuum vent hose for a blockage between the turbine intake shut-off valve solenoid and the air filter housing

      No:  If a vacuum cannot be achieved the vent hose is functioning correctly

      Repeat the test for the charge air shut-off valve vent hose connecting the gauge at point TP3

      If the turbine intake shut-off valve and the charge air shut-off valve vent hoses are functioning correctly GO to A3  .

  3. A3: TURBINE INTAKE SHUT-OFF VALVE CLOSED POSITION CHECK 
    1. Using the Jaguar Land Rover Approved Diagnostic Equipment, check datalogger signals - Turbocharger Shut-off valve opening position - Measured (0x03F1)  and Turbocharger Shut-off valve opening position - Commanded (0x03F0) 

      With the ignition on and the engine off is the value for signal Turbocharger Shut-off valve opening position - Measured <4%?

      Yes: GO to A4  .

      No:  Turbine intake shut-off valve is faulty and sticking open

      Install a new turbine intake shut-off valve

      After installing a new turbine intake shut-off valve, complete the calibration procedure. Using the Jaguar Land Rover Approved Diagnostic Equipment, perform routine - Powertrain set-up - Turbine shut-off valve

  4. A4: CHARGE AIR SHUT-OFF VALVE OPERATION CHECK 1 
    1. Connect a hand operated vacuum pump to the charge air shut-off valve hose at point TP4
    2. Check the operation of the charge air shut-off valve by gradually applying a vacuum and then releasing it while observing the charge air shut-off valve actuator connecting rod
    3. NOTE: A clunk can be heard from the charge air shut-off valve as it closes

      Did the charge air shut-off valve open as a vacuum was applied and close when the vacuum was released?

      Yes: GO to A6  .

      No: GO to A5  .

  5. A5: CHARGE AIR SHUT-OFF VALVE OPERATION CHECK 2 
    1. Connect a hand operated vacuum pump directly to the charge air shut-off valve at point TP5
    2. Check the operation of the charge air shut-off valve by gradually applying a vacuum and then releasing it while observing the charge air shut-off valve actuator connecting rod
    3. NOTE: A clunk can be heard from the charge air shut-off valve as it closes

      Did the charge air shut-off valve open as a vacuum was applied and close when the vacuum was released?

      Yes:  Blockage in the vacuum hose between the charge air shut-off valve solenoid and charge air shut-off valve

      Inspect vacuum hose for blockages/defects and rectify as required

      No:  Faulty charge air shut-off valve

      Install a new charge air shut-off valve

  6. A6: CHARGE AIR SHUT-OFF VALVE ACTIVATION CHECK 1 
    1. Connect a hand operated vacuum pump using a 'T' piece between the charge air shut-off valve and the charge air shut-off valve solenoid at point TP4
    2. Start the engine and allow to idle. View the vacuum reading while in mono Turbocharger mode (during the first three minutes of idle)

      Is a vacuum present?

      Yes:  Remove and inspect the charge air shut-off valve solenoid. Solenoid stuck open. Replace as required

      No: GO to A7  .

  7. A7: CHARGE AIR SHUT-OFF VALVE ACTIVATION CHECK 2 
    1. With the hand operated vacuum pump still connected at point TP4 through the "T" piece
    2. Using the Jaguar Land Rover Approved Diagnostic Equipment, check datalogger signals - Turbocharger Shut-off valve opening position - Commanded (0x03F0)  and Turbocharger Shut-off valve opening position - Measured (0x03F1) 
    3. After approximately 3 minutes at idle the turbine intake shut-off valve and charge air shut-off valve will automatically be triggered to open and activate the secondary Turbocharger
    4. This can be confirmed by datalogger signal - Turbocharger Shut-off valve opening position - Commanded  changing value to 100%
    5. When this occurs a vacuum of approximately 800mbar should be displayed on the gauge
    6. Observe the value on the vacuum gauge as the secondary Turbocharger is activated

      Is the correct vacuum achieved and maintained?

      Yes: GO to A8  .

      No: GO to A9  .

  8. A8: CHARGE AIR SHUT-OFF VALVE ACTIVATION CHECK 3 
    1. With the engine idling in bi-turbo mode an increase in engine speed will return the engine to mono Turbocharger mode
    2. Increase engine speed and then allow the engine to return to idle
    3. The vacuum will return to zero (within 2-3 seconds)
    4. Observe the value on the vacuum gauge as the secondary Turbocharger is deactivated

      Is the correct vacuum is achieved and maintained?

      Yes: GO to A10  .

      No:  Check that the datalogger signal - Turbocharger Shut-off valve opening position - Commanded (0x03F0)  has changed to 0%. If so, remove and inspect the charge air shut-off valve solenoid. Solenoid stuck open. Replace as required

  9. A9: CHARGE AIR SHUT-OFF VALVE VACUUM SUPPLY CHECK 
    1. Connect the vacuum pump with gauge to the charge air shut-off valve solenoid vacuum supply hose at point TP6
    2. Start the engine and allow to idle
    3. Observe the gauge, a vacuum of approximately 800mbar should be displayed

      Is the correct vacuum achieved and maintained?

      Yes:  Remove and inspect the charge air shut-off valve solenoid. Solenoid stuck closed. Replace as required

      No: GO to A18  .

  10. A10: TURBINE INTAKE SHUT-OFF VALVE ACTIVATION CHECK 1 
    1. Connect a hand operated vacuum pump using a 'T' piece between the turbine intake shut-off valve and the turbine intake shut-off valve solenoid at point TP7
    2. Start the engine and allow to idle. View the vacuum reading while in mono Turbocharger mode (during the first three minutes of idle)

      Is a vacuum present?

      Yes:  Remove and inspect the turbine intake shut-off valve solenoid. Solenoid stuck open. Replace as required

      No: GO to A11  .

  11. A11: TURBINE INTAKE SHUT-OFF VALVE ACTIVATION CHECK 2 
    1. With the hand operated vacuum pump still connected into the circuit at point TP7
    2. Allow the engine to idle
    3. Using the Jaguar Land Rover Approved Diagnostic Equipment, record datalogger signals - Turbocharger Shut-off valve opening position - Commanded (0x03F0)  and Turbocharger Shut-off valve opening position - Measured (0x03F1) 
    4. After approximately 3 minutes at idle the turbine intake shut-off valve will automatically be triggered to open and activate the secondary Turbocharger
    5. This can be confirmed by datalogger signal - Turbocharger Shut-off valve opening position - Commanded  changing value to 100%
    6. When this occurs a vacuum of approximately 800mbar should be displayed on the gauge
    7. Observe the value on the vacuum gauge as the secondary Turbocharger is activated

      Is the correct vacuum is achieved and maintained?

      Yes: GO to A12  .

      No: GO to A17  .

  12. A12: TURBINE INTAKE SHUT-OFF VALVE ACTIVATION CHECK 3 
    1. Look at the recorded datalogger signals 1 - Turbocharger Shut-off valve opening position - Commanded (0x03F0)  and 2 - Turbocharger Shut-off valve opening position - Measured (0x03F1) 
      G11607437Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC

      Is the measured value for the Turbocharger shut-off valve 98% or greater? (See screenshot for reference)

      Yes: GO to A13  .

      No: GO to A19  .

  13. A13: TURBINE INTAKE SHUT-OFF VALVE ACTIVATION CHECK 4 
    1. Look at the recording for the datalogger signal 2 - Turbocharger Shut-off valve opening position - Measured (0x03F1) 

      Does the signal show the valve moving smoothly and continuously to its maximum open position? (Refer to screenshot in step A12)

      Yes: GO to A14  .

      No:  Turbine intake shut-off valve is sticking. Replace faulty turbine intake shut-off valve

      After installing a new turbine intake shut-off valve, complete the calibration procedure. Using the Jaguar Land Rover Approved Diagnostic Equipment, perform routine - Powertrain set-up - Turbine shut-off valve

  14. A14: TURBINE INTAKE SHUT-OFF VALVE ACTIVATION CHECK 5 
    1. Using the Jaguar Land Rover Approved Diagnostic Equipment, record datalogger signals - Turbocharger Shut-off valve opening position - Commanded (0x03F0)  and Turbocharger Shut-off valve opening position - Measured (0x03F1) 
    2. If the engine speed is increased from idle then the turbine shut-off valve will automatically close returning to mono Turbocharger mode
    3. Increase engine speed and then allow the engine to return to idle
    4. The vacuum will drop back to zero (within 2-3 seconds)
    5. Observe the value on the vacuum gauge as the secondary Turbocharger is deactivated

      Is the correct vacuum achieved and maintained?

      Yes: GO to A15  .

      No:  Check that the datalogger signal - Turbocharger Shut-off valve opening position - Commanded (0x03F0)  has changed to 0%. If so, remove and inspect the charge air shut-off valve solenoid. Solenoid stuck open. Replace as required

  15. A15: TURBINE INTAKE SHUT-OFF VALVE ACTIVATION CHECK 6 
    1. Look at the recorded datalogger signals 3 - Turbocharger Shut-off valve opening position - Commanded (0x03F0)  and 4 - Turbocharger Shut-off valve opening position - Measured (0x03F1) 
      G11607438Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC

      Did the signal value for Turbocharger Shut-off valve opening position - Measured  change to <4%? (See screenshot for reference)

      Yes: GO to A16  .

      No:  Turbine intake shut-off valve is sticking

      Install a new turbine intake shut-off valve

      After installing a new turbine intake shut-off valve, complete the calibration procedure. Using the Jaguar Land Rover Approved Diagnostic Equipment, perform routine - Powertrain set-up - Turbine shut-off valve

  16. A16: TURBINE INTAKE SHUT-OFF VALVE ACTIVATION CHECK 7 
    1. Look at the recorded datalogger signals 3 - Turbocharger Shut-off valve opening position - Commanded (0x03F0)  and 4 - Turbocharger Shut-off valve opening position - Measured (0x03F1) 

      Does the signal show the valve moving smoothly and continuously to its minimum closed position? (Refer to screenshot in step A15)

      Yes:  No fault present. Exit pin point test

      No:  Turbine intake shut-off valve is sticking

      Install a new turbine intake shut-off valve

      After installing a new turbine intake shut-off valve, complete the calibration procedure. Using the Jaguar Land Rover Approved Diagnostic Equipment, perform routine - Powertrain set-up - Turbine shut-off valve

  17. A17: TURBINE INTAKE SHUT-OFF VALVE VACUUM SUPPLY CHECK 
    1. Connect the vacuum pump with gauge to the turbine intake shut-off valve solenoid vacuum supply line at point TP8
    2. Start the engine and allow to idle
    3. Observe the gauge, a vacuum of approximately 800mbar should be displayed

      Is the correct vacuum is achieved and maintained?

      Yes:  Remove and inspect the turbine intake shut-off valve solenoid. Solenoid stuck closed. Replace as required

      No: GO to A18  .

  18. A18: VACUUM SUPPLY CHECK 
    1. Switch off the engine and the ignition
    2. With the hand operated vacuum pump still connected into the circuit at point TP8, apply a vacuum

      Does it hold vacuum pressure?

      Yes:  Look for air leaks on the vacuum supply line between the non return valve and the vacuum pump

      Complete smoke test to identify leak point

      Check the output pressure directly at the vacuum pump

      No:  Air leak in vacuum supply line between the non return valve and the turbine intake shut-off valve/charge air shut-off valve solenoids

      Complete smoke test to identify leak point. Repair/replace as required

  19. A19: TURBINE INTAKE SHUT-OFF VALVE OPERATION CHECK 
    1. Connect a hand operated vacuum pump directly to the secondary turbocharger turbine intake shut-off valve at point TP9
    2. Gradually apply a vacuum and observe the turbine intake shut-off valve actuator and monitor the position sensor signal with datalogger
      G11607439Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC

      Does the turbine intake shut-off valve operate and is this reflected by signal 5 - Turbocharger Shut-off valve opening position - Measured (0x03F1)  value?

      Yes:  Blockage in vacuum supply line between the turbine intake shut-off valve and charge air shut-off valve solenoid

      Inspect hose for defect and rectify as required

      No:  Turbine intake shut-off valve failure

      Install a new turbine intake shut-off valve

      After installing a new turbine intake shut-off valve, complete the calibration procedure. Using the Jaguar Land Rover Approved Diagnostic Equipment, perform routine - Powertrain set-up - Turbine shut-off valve

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