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Home >> Lexus >> 2004 >> IS 300 Base, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> Testing & Diagnosis >> Engine Control System - Diagnosis >> Circuit Inspection >> DTC P0550: Power Steering Pressure Sensor/Switch Circuit, DTC P0552: Power Steering Pressure Sensor/Switch Circuit Low Input, DTC P0553: Power Steering Pressure Sensor/Switch Circuit High Input >> Inspection Procedure
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Inspection Procedure

  1. Check power steering oil pressure sensor. 

    PREPARATION: 

    1. Connect the hand-held tester or the OBD II scan tool to the DLC3.
    2. Start the engine.
    3. Push the hand-held tester or the OBD II scan tool main switch ON.
    4. Enter following menus: DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL / PS SINGAL.

    CHECK: 

    Read signal displayed on the hand-held tester or the OBD II scan tool.

    RESULT: 

    Fig 1: Power Steering Oil Pressure Sensor Condition Chart
    G01496418Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. OK: Check for intermittent problems (See  PRE-CHECK   ). 
    2. NG: Go to next step. 
  2. Check for open in harness and connector between engine ECU and power steering oil pressure sensor (See  HOW TO USE THE DIAGNOSTIC CHART AND INSPECTION PROCEDURE  ). 
    1. NG: Repair or replace harness or connector. 
    2. OK: Replace power steering oil pressure sensor (See  REMOVAL  ). 
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