LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2004 >> M45 >> Repair and Diagnosis (Single Page) >> Engine Performance >> Engine Control System >> DTC P0550: PSP Sensor >> Diagnostic Procedure >> 2. Check PSP Sensor Power Supply Circuit
April 5, 2026: LEMON Manuals is launched! Read the announcement.

2. Check PSP Sensor Power Supply Circuit

  1. Disconnect power steering pressure (PSP) sensor harness connector.
  2. Turn ignition switch ON.
    Fig 1: Identifying Power Steering Pressure (PSP) Sensor Harness Connector
    G00796162Courtesy of NISSAN MOTOR CO., U.S.A.
  3. Check voltage between PSP sensor terminal 1 and ground with CONSULT-II or tester.
    Fig 2: Checking Voltage Between PSP Sensor Terminal 1 & Ground
    G00796163Courtesy of NISSAN MOTOR CO., U.S.A.

    Voltage: Approximately 5V 

OK or NG 

  1. OK: GO TO 4. CHECK PSP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT .
  2. NG: GO TO 3.