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Home >> Lexus >> 2022 >> LX 600 Base >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Stop And Start System - Diagnostic Codes (2 Of 2) & Circuit Tests >> Stop And Start System >> Neutral Position Switch Circuit [12/2021 - ] >> Procedure
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Neutral Position Switch Circuit [12/2021 - ]: Procedure

  1. READ VALUE USING GTS (NEUTRAL SWITCH) 
    1. Enter the following menus: Powertrain / Stop and Start / Data List / Neutral Switch.

      Powertrain > Stop and Start > Data List 

      Tester Display
      Neutral Switch
    2. In accordance with the display on the GTS, read the Data List.

      OK

      Tester Display Condition Normal Condition
      Neutral Switch Shift lever in P or N ON
      Shift lever not in P or N OFF

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    GO TO PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [12/2021 - ] 

    Result: 

    NG 

    See step  2

  2. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY 

    Refer to INSPECTION [12/2021 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY. Refer to  REMOVAL [12/2021 - ] 

    Result: 

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - PARK/NEUTRAL POSITION SWITCH ASSEMBLY) 
    1. Disconnect the engine stop and start ECU connector.
    2. Disconnect the park/neutral position switch assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B38-21 (STA) - C34-5 (L) Always Below 1 Ω
      B38-17 (CLL) - C34-4 (B) Always Below 1 Ω
      B38-21 (STA) - Body ground Always 80 to 180 Ω
      B38-17 (CLL) - Body ground Always 10 kΩ or higher
      C34-5 (L) - Body ground Always 80 to 180 Ω
      C34-4 (B) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ENGINE STOP AND START ECU. Refer to  REMOVAL [12/2021 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR