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Home >> Infiniti >> 2015 >> Q60 Base, 2D Convertible >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostic Trouble Codes (DTCS) P0447-P2123) (Convertible) >> DTC/Circuit Diagnosis >> DTC P0550: PSP Sensor >> Diagnosis Procedure >> Diagnostic Test
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Diagnostic Test

  1. CHECK GROUND CONNECTION

    1. Turn ignition switch OFF.
    2. Check ground connection M95. Refer to Ground Inspection in CIRCUIT INSPECTION .

    Is the inspection result normal?

    YES 

    GO TO STEP 2  .

    NO 

    Repair or replace ground connection.

  2. CHECK PSP SENSOR POWER SUPPLY CIRCUIT

    1. Disconnect power steering pressure (PSP) sensor harness connector.
    2. Turn ignition switch ON.
    3. Check the voltage between PSP sensor harness connector and ground.
      PSP sensor Ground Voltage (V)
      Connector Terminal
      F35 3 Ground Approx. 5

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    Repair open circuit, short to ground or short to power in harness or connectors.

  3. CHECK PSP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between PSP sensor harness connector and ECM harness connector.
      PSP sensor ECM Continuity
      Connector Terminal Connector Terminal
      F35 1 F102 96 Existed
    4. Also check harness for short to ground and short to power.

    Is the inspection result normal?

    YES 

    GO TO STEP 4  .

    NO 

    Repair open circuit, short to ground short to power in harness or connectors.

  4. CHECK PSP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

    1. Check the continuity between PSP sensor harness connector and ECM harness connector.
      PSP sensor ECM Continuity
      Connector Terminal Connector Terminal
      F35 2 F102 87 Existed
    2. Also check harness for short to ground and short to power.

    Is the inspection result normal?

    YES 

    GO TO STEP 5  .

    NO 

    Repair open circuit, short to ground or short to power in harness or connectors.

  5. CHECK PSP SENSOR

    Refer to COMPONENT INSPECTION .

    Is the inspection result normal?

    YES 

    GO TO STEP 6  .

    NO 

    Replace PSP sensor. Refer to EXPLODED VIEW .

  6. CHECK INTERMITTENT INCIDENT

    Refer to INTERMITTENT INCIDENT .

    INSPECTION END

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