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Home >> Lexus >> 2024 >> TX 350 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 91 (Engine Control System - Circuit Tests & Symptom Tests (2 Of 2)) >> SFI SYSTEM (for 1Motor-HEV Model) >> Starter System [09/2023 - ] >> Procedure

Starter System [09/2023 - ]: Procedure

WARNING: This page is about a different car, the 2024 Lexus TX 500h. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK WHETHER ENGINE CAN BE CRANKED 
    1. Check if the engine can be cranked.

      Result

      Result Proceed to
      Engine cannot be cranked A
      Engine can be cranked B

    Result: 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [09/2023 - ] 

    Result: 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE (SOLENOID (SL8) VALVE) - TCM) 

    Pre-procedure1

    1. Disconnect the TCM connector.

      Procedure1

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C25-4 (SL8+) - C25-21 (SLG1) 20°C (68°F) 5.0 to 5.6 Ω

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    3. None.

    Result: 

    OK 

    REPLACE TCM. Refer to  REMOVAL [09/2023 - ] 

    Result: 

    NG 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - TCM) 

    Pre-procedure1

    1. Disconnect the transmission wire connector.
    2. Disconnect the TCM connector.

      Procedure1

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C65-19 (SL8+) - C25-4 (SL8+) Always Below 1 Ω
      C65-10 (SLG1) - C25-21 (SLG1) Always Below 1 Ω
      C65-19 (SL8+) or C25-4 (SL8+) - Body ground and other terminals Always 10 kΩ or higher
      C65-10 (SLG1) or C25-21 (SLG1) - Body ground and other terminals Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

      Post-procedure1

    4. None.

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  4

  4. INSPECT SOLENOID (SL8) VALVE 

    Refer to INSPECTION [09/2023 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    OK 

    REPAIR OR REPLACE TRANSMISSION WIRE. Refer to  REMOVAL [09/2023 - ] 

    Result: 

    NG 

    REPLACE SOLENOID (SL8) VALVE (TRANSMISSION VALVE BODY ASSEMBLY). Refer to  REMOVAL [09/2023 - ]