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Home >> Infiniti >> 2019 >> QX30 Essential, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTC/Circuit Diagnosis) (4 Of 4) >> DTC/Circuit Diagnosis >> DTC P24D7: EVAP Control System Pressure Sensor >> Diagnosis Procedure
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Diagnosis Procedure

  1. COMPONENT FUNCTION CHECK 

    SYMBOL With CONSULT

    1. Turn ignition switch ON.
    2. On CONSULT screen, select "ENGINE" >> "ACTIV TEST" >> "Check purging pressure control".
    3. Select "OPEN".
    4. Check that the indicated value of purge pressure sensor is between (-)1 - (+)1 kPa [(-)0.01 - (+)0.01 bar, (-)0.01 - (+)0.01 kg-cm2, (-)0.145 - (+)0.145 psi]

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    GO TO 2.

  2. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY 
    1. Disconnect EVAP control system pressure sensor harness connector.
    2. Turn ignition switch ON.
    3. Check the voltage between EVAP control system pressure sensor harness connector and ground.

      +

      -

      Voltage

      EVAP control system pressure sensor

      Connector

      Terminal

      F173

      3

      Ground

      4.75 - 5.25 V

    Is the inspection result normal?

    YES

    GO TO 4.

    NO

    GO TO 3.

  3. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between ECM harness connector and EVAP control system pressure sensor harness connector.

      +

      -

      Continuity

      ECM

      EVAP control system pressure sensor

      Connector

      Terminal

      Connector

      Terminal

      F149

      16

      F173

      3

      Existed

    4. Also check harness for short to power and short to ground.

    Is the inspection result normal?

    YES

    Check ECM power supply circuit. Refer to Diagnosis Procedure .

    NO

    Repair or replace error-detected parts.

  4. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between ECM harness connector and EVAP control system pressure sensor harness connector.

      +

      -

      Continuity

      ECM

      EVAP control system pressure sensor

      Connector

      Terminal

      Connector

      Terminal

      F149

      36

      F173

      1

      Existed

      11

      2

    4. Also check harness for short to power and short to ground.

    Is the inspection result normal?

    YES

    Replace EVAP control system pressure sensor. Refer to Exploded View .

    NO

    Repair or replace error-detected parts.