LEMON Manuals: Even more car manuals for everyone
Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 217 (Engine Control System (DTC/Circuit Diagnosis) (CUMMINS 5.0L) (6 Of 6)) >> DTC/Circuit Diagnosis >> DTC P2495-00: EGR Cooler Bypass Position Sensor Circuit High >> 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 DTC PRIORITY 
    1. Start the engine and let it idle for 1 minute.
    2. Turn engine OFF.
    3. Turn ignition switch ON.
    4. Connect CONSULT and check for existing "ENGINE" diagnostic trouble codes:
      • P0652-00
      • P0653-00

    Are any of the above current DTCs present?

    YES

    Refer to DTC Index .

    NO

    GO TO 2 .

  2. CHECK FOR CURRENT DTC 

    Using CONSULT, check for existing "ENGINE" diagnostic trouble codes.

    Is P2495-00 DTC current?

    YES

    GO TO 3 .

    NO

    Refer to Intermittent Incident .

  3. INSPECT EGR COOLER BYPASS VALVE ACTUATOR AND ELECTRICAL CONNECTIONS 
    1. Turn ignition switch OFF.
    2. Disconnect the EGR cooler bypass valve actuator connector.
    3. Inspect connector for the following:
      • Loose connector.
      • Corroded pins.
      • Bent or broken pins.
      • Pushed back or expanded pins.
      • Moisture in or on the connector.
      • Missing or damaged connector seals.
      • Dirt or debris on or in the connector pins.
      • Connector shell broken.
      • Wire insulation damage.
      • Damaged connector locking tab

    Is the inspection result normal?

    YES

    GO TO 4 .

    NO

    • Repair or replace error-detected parts.
    • GO TO 13 .
  4. CHECK THE CIRCUIT RESPONSE 
    1. Connect a jumper wire between the EGR cooler bypass actuator position sensor RETURN circuit terminal 3 and the SIGNAL circuit terminal 4 at the EGR bypass actuator connector.
    2. Turn ignition switch ON.
    3. Wait 30 seconds.
    4. Using CONSULT, check for current "ENGINE" diagnostic trouble codes.

    Is P2494-00 DTC current and P2495-00 DTC past?

    YES

    GO TO 5 .

    NO

    GO TO 7 .

  5. CHECK THE EGR BYPASS SENSOR POWER SUPPLY AND RETURN CIRCUITS 
    1. Disconnect the jumper wire.
    2. Check the voltage between EGR bypass actuator position sensor supply and return circuits at the EGR bypass valve connector.

      EGR bypass valve

      Voltage (V)

      (Approx.)

      Connector

      Terminal (+)

      Terminal (-)

      F145

      2

      3

      5

    Is the inspection result normal?

    YES

    GO TO 6 .

    NO

    GO TO 10 .

  6. CHECK THE DTC AND VERIFY SENSOR CONDITION 
    1. Turn ignition switch OFF.
    2. Connect all harness connectors.
    3. Turn ignition switch ON.
    4. Wait 30 seconds.
    5. Using CONSULT, check for current "ENGINE" diagnostic trouble codes.

    Is P2495-00 DTC current?

    YES

    NO

    • The removal and installation of the connector corrected the issue.
    • GO TO 13 .
  7. INSPECT ECM AND ELECTRICAL CONNECTIONS 
    1. Turn ignition switch OFF.
    2. Disconnect the jumper wire.
    3. Disconnect the ECM F101 connector.
    4. Inspect connector for the following:
      • Loose connector.
      • Corroded pins.
      • Bent or broken pins.
      • Pushed back or expanded pins.
      • Moisture in or on the connector.
      • Missing or damaged connector seals.
      • Dirt or debris on or in the connector pins.
      • Connector shell broken.
      • Wire insulation damage.
      • Damaged connector locking tab.

    Is the inspection result normal?

    YES

    GO TO 8 .

    NO

    • Repair or replace error-detected parts.
    • GO TO 13 .
  8. CHECK THE ECM RESPONSE 
    CAUTION: When probing or jumping between connector pins or terminals:
    • Always use extreme care or connector damage could result. Do not bend or damage connector pins and terminals. Damaged connectors, pins or terminals could result in additional issues or difficult-to-diagnose intermittent incidents.
    • Do not probe or short unintended circuits or component and/or control module damage could result.
    1. Connect a jumper wire between ECM connector F101 return circuit pin 127 and signal circuit pin 172.
    2. Turn ignition switch ON.
    3. Wait for 30 seconds.
    4. Using CONSULT, check for current "ENGINE" diagnostic trouble codes.

    Did DTC P2494-00 become current and DTC P2495-00 past?

    YES

    GO TO 9 .

    NO

  9. CHECK FOR PAST DTC 
    1. Turn ignition switch OFF.
    2. Disconnect the jumper wire.
    3. Connect all harness connectors.
    4. Turn ignition switch ON.
    5. Wait 30 seconds.
    6. Using CONSULT, check for current ENGINE diagnostic trouble codes.

    Is P2495-00 DTC current?

    YES

    • A pin-to-pin short circuit has been detected on the SIGNAL wire of the engine harness. Repair or replace the engine harness.
    • GO TO 13 .

    NO

    • The removal and installation of the connector corrected the issue.
    • GO TO 13 .
  10. INSPECT ECM AND ELECTRICAL CONNECTIONS 
    1. Turn ignition switch OFF.
    2. Disconnect the ECM F101 connector.
    3. Inspect connector for the following:
      • Loose connector.
      • Corroded pins.
      • Bent or broken pins.
      • Pushed back or expanded pins.
      • Moisture in or on the connector.
      • Missing or damaged connector seals.
      • Dirt or debris on or in the connector pins.
      • Connector shell broken.
      • Wire insulation damage.
      • Damaged connector locking tab.

    Is the inspection result normal?

    YES

    GO TO 11 .

    NO

    • Repair or replace error-detected parts.
    • GO TO 13 .
  11. CHECK THE SENSOR SUPPLY VOLTAGE AND RETURN CIRCUITS 
    CAUTION: When probing or jumping between connector pins or terminals:
    • Always use extreme care or connector damage could result. Do not bend or damage connector pins and terminals. Damaged connectors, pins or terminals could result in additional issues or difficult-to-diagnose intermittent incidents.
    • Do not probe or short unintended circuits or component and/or control module damage could result.
    1. Turn ignition switch ON.
    2. Check the voltage between EGR bypass actuator position sensor power supply pin 106 and return circuit pin 127 at the ECM.

    Is the voltage approximately 5V?

    YES

    GO TO 12 .

    NO

  12. CHECK FOR PAST DTC 
    1. Turn ignition switch OFF.
    2. Connect all harness connectors.
    3. Turn ignition switch ON.
    4. Wait 30 seconds.
    5. Using CONSULT, check for current "ENGINE" diagnostic trouble codes.

    Is P2495-00 DTC current?

    YES

    • An open return circuit has been detected in the engine harness. Repair or replace the engine harness.
    • GO TO 13 .

    NO

    • The removal and installation of the connector corrected the issue.
    • GO TO 13 .
  13. ERASE CURRENT DTCS 
    1. Turn ignition switch OFF.
    2. Disconnect the jumper wire.
    3. Connect all harness connectors.
    4. Turn ignition switch ON.
    5. Using CONSULT, erase "ENGINE" diagnostic trouble codes.
    6. Operate the engine within the "Conditions for Clearing DTC".
    7. Using CONSULT, check for current ENGINE diagnostic trouble codes.

    Is P2495-00 DTC current?

    YES

    Return to Diagnosis Procedure. Refer to DTC Description .

    NO

    Repair complete.

scientia non olet · About LEMON Manuals