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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 208 (Engine Control System (DTC/Circuit Diagnosis) (CUMMINS 5.0L) (5 Of 6)) >> DTC/Circuit Diagnosis >> DTC P22CD-00: TC Outlet Switching Valve Stuck Open >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan Titan XD. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR CURRENT DTC 
    1. Turn ignition switch ON.
    2. Connect CONSULT and check for "ENGINE" diagnostic trouble codes.
    3. Check If any of the following DTCs are "current" or "past":
      • P0237-00
      • P0238-00
      • P1191-00
      • P1192-00
      • P1193-00
      • P22CB-00
      • P22CC-00

    Is applicable DTC current or past?

    YES

    Perform diagnosis of applicable DTC. Refer to DTC Index .

    NO

    GO TO 2 .

  2. CHECK FOR TURBOCHARGER RELATED DTC 
    1. Using CONSULT, check for other "ENGINE" diagnostic trouble codes.
    2. Look for "current" DTCs related to turbocharger.

    Any applicable current DTC?

    YES

    Perform diagnosis of applicable DTC. Refer to DTC Index .

    NO

    GO TO 3 .

  3. INSPECT VACUUM HOSES 

    Inspect for cracks, collapsed hose or other damage to the vacuum hoses at the following locations:

    • Vacuum pump
    • Compressor bypass valve solenoid
    • Compressor bypass valve actuator

    Is the inspection result normal?

    YES

    GO TO 4 .

    NO

    Repair or replace error-detected parts.

  4. VERIFY VACUUM PUMP OUTPUT 
    1. Start the engine.
    2. Connect a hand pump or a vacuum gauge to the vacuum pump inlet.
    3. Verify the vacuum pump output is sufficient:

    Minimum required vacuum

    -40 kPa (-0.408 kg/cm 2 , -5.8 psi)

    Is the vacuum supply sufficient?

    YES

    GO TO 5 .

    NO

  5. VERIFY THE COMPRESSOR BYPASS VALVE ACTUATOR 
    1. Stop the engine.
    2. Turn ignition switch ON.
    3. Using CONSULT, monitor the compressor bypass valve actuator.
    4. Use a hand pump to provide vacuum to the compressor bypass valve actuator.
    5. Verify that the compressor bypass valve moves to both linkage stops.

    Compressor bypass valve linkage moves from stop to stop?

    YES

    GO TO 6 .

    NO

    • Remove any obstruction to the linkage or Replace the compressor Bypass Valve Actuator. Refer to Removal and Installation .
    • GO TO 7 .
  6. VERIFY LOW PRESSURE TURBOCHARGER BOOST PRESSURE SENSOR ACCURACY 
    1. Verify the low-pressure turbocharger boost speed sensor.
    2. Using CONSULT, monitor and log the following:
      • Engine speed.
      • Low-pressure turbocharger boost pressure.
      • Charge-air cooler outlet pressure.
      • Compressor bypass valve.
    3. Start the engine.
    4. Override compressor bypass valve to OPEN.
    5. Use the accelerator pedal to raise the engine speed to 2, 000 RPM and hold for 20 seconds.
    6. Return the engine speed to idle.
    7. Repeat above steps with compressor bypass valve override set to CLOSED.
    8. Compare low-pressure turbocharger boost pressure values at 2, 000 RPM with valve OPEN vs. CLOSED.

    From open to closed valve, turbocharger boost pressure increased by 5 kPa (0.73 psi) or more at 2, 000 RPM?

    YES

    GO TO 7 .

    NO

  7. ERASE CURRENT DTC 
    1. Stop the engine.
    2. Connect all components.
    3. Turn ignition switch ON
    4. Using CONSULT, erase "ENGINE" diagnostic trouble codes
    5. Operate the engine within the "Conditions for setting the DTC"
    6. Using CONSULT, check for "ENGINE" diagnostic trouble codes

    Is P22CD-00 DTC current?

    YES

    Return to Diagnosis Procedure. Refer to DTC Description .

    NO

    Repair complete.

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