LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2024 >> RC 350 Base, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 45 (Engine Control System (8AR-FTS) - Circuit Tests (3 Of 3) & Symptom Tests (1 Of 3)) >> SFI System >> Pattern Select Switch Snow Mode Circuit [10/2015 - ] >> Procedure

Pattern Select Switch Snow Mode Circuit [10/2015 - ]: Procedure

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2024 Lexus RC 300, 2023 Lexus RC 300, 2022 Lexus RC 300, 2021 Lexus RC 300, and 2020 Lexus RC 300. However, it is still accessible from the selected car via links, so may be relevant.
  1. READ VALUE USING TECHSTREAM (SNOW MODE SW) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG) and turn the Techstream on.
    3. Enter the following menus: Powertrain / Engine / Data List / Snow Mode SW.

      Powertrain > Engine > Data List 

      Tester Display
      Snow Mode SW
    4. Read the value displayed on the Techstream.

      OK

      Condition Techstream Display (Snow Mode SW)
      SNOW mode switch pushed and held ON
      SNOW mode switch not pushed OFF

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    CHECK FOR INTERMITTENT PROBLEMS. Refer to  CHECK FOR INTERMITTENT PROBLEMS [10/2015 - ] 

    Result: 

    NG 

    See step  2

  2. INSPECT COMBINATION SWITCH ASSEMBLY 
    1. Inspect the combination switch assembly (SNOW mode switch).

      Refer to INSPECTION [09/2014 - 11/2017] , or refer to INSPECTION [11/2017 - 09/2020] , or refer to INSPECTION [09/2020 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE COMBINATION SWITCH ASSEMBLY. Refer to  REMOVAL [09/2014 - ] 

    Result: 

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (COMBINATION SWITCH ASSEMBLY - ECM) 
    1. Disconnect the combination switch assembly connector.
    2. Disconnect the ECM connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O78-3 (SNSW) - A82-23 (SNWI) Always Below 1 Ω
      O78-3 (SNSW) or A82-23 (SNWI) - Body ground and other terminals Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (COMBINATION SWITCH ASSEMBLY - BODY GROUND) 
    1. Disconnect the combination switch assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O78-16 (E) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ECM. Refer to  REMOVAL [10/2015 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

scientia non olet · About LEMON Manuals