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Home >> Lexus >> 2017 >> IS 300 F Sport >> Repair and Diagnosis >> External Pages >> Different car >> Section 102 (Automatic Transmission System (Aa80E) - Diagnostic Codes (1 Of 2)) >> Automatic Transmission System >> DTC P0705: Transmission Range Sensor Circuit Malfunction (PRNDL Input) [11/2021 - ] >> Procedure

DTC P0705: Transmission Range Sensor Circuit Malfunction (PRNDL Input) [11/2021 - ]: Procedure

WARNING: This page is about a different car, the 2024 Lexus IS 500, 2023 Lexus IS 500, and 2022 Lexus IS 500. However, it is still accessible from the selected car via links, so may be relevant.
  1. READ VALUE USING TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / ECT / Data List / Shift SW Status (P Range), Shift SW Status (R Range), Shift SW Status (N Range), Shift SW Status (D Range).
    5. Read the Data List according to the display on the Techstream.

      Powertrain > ECT > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Shift SW Status (P Range) Park/neutral position switch status ON or OFF
      • ON: Shift lever in P
      • OFF: Shift lever not in P
      When the shift lever position displayed on the Techstream differs from the actual position, adjustment of the park/neutral position switch assembly or shift cable may be incorrect
      Shift SW Status (R Range) Park/neutral position switch status ON or OFF
      • ON: Shift lever in R
      • OFF: Shift lever not in R
      When the shift lever position displayed on the Techstream differs from the actual position, adjustment of the park/neutral position switch assembly or shift cable may be incorrect
      Shift SW Status (N Range) Park/neutral position switch status ON or OFF
      • ON: Shift lever in N
      • OFF: Shift lever not in N
      When the shift lever position displayed on the Techstream differs from the actual position, adjustment of the park/neutral position switch assembly or shift cable may be incorrect
      Shift SW Status (D Range) Park/neutral position switch status ON or OFF
      • ON: Shift lever in D or M
      • OFF: Shift lever not in D or M
      When the shift lever position displayed on the Techstream differs from the actual position, adjustment of the park/neutral position switch assembly or shift cable may be incorrect

      Powertrain > ECT > Data List 

      Tester Display
      Shift SW Status (P Range)
      Shift SW Status (R Range)
      Shift SW Status (N Range)
      Shift SW Status (D Range)

      Result

      Result Proceed to
      Data List value is normal A
      Data List value is not normal B

    Result: 

    See step  5

    Result: 

    See step  2

  2. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY 
    1. Disconnect the F176 park/neutral position switch assembly connector.
      GTY502920Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Park/Neutral Position Switch Assembly)
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      6 (PL) - 2 (RB) Shift lever in P Below 1 Ω
      1 (RL) - 2 (RB) Shift lever in R Below 1 Ω
      9 (NL) - 2 (RB) Shift lever in N Below 1 Ω
      7 (DL) - 2 (RB) Shift lever in D or M Below 1 Ω
      6 (PL) - 2 (RB) Shift lever not in P 10 kΩ or higher
      1 (RL) - 2 (RB) Shift lever not in R 10 kΩ or higher
      9 (NL) - 2 (RB) Shift lever not in N 10 kΩ or higher
      7 (DL) - 2 (RB) Shift lever not in D or M 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY. Refer to  COMPONENTS [11/2021 - ] 

    Result: 

    OK 

    See step  3

  3. CHECK PARK/NEUTRAL POSITION SWITCH ASSEMBLY (POWER SOURCE) 
    1. Disconnect the F176 park/neutral position switch assembly connector.
      GTY1083385Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Park/Neutral Position Switch Assembly)
    2. Turn the engine switch on (IG).
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      F176-2 (RB) - Body ground Engine switch on (IG) 11 to 14 V

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (PARK/NEUTRAL POSITION SWITCH ASSEMBLY - BATTERY) 

    Result: 

    OK 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH ASSEMBLY - TCM) 
    1. Disconnect the A118 TCM connector.
      GTY1083042Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Rear view of wire harness connector
      (to TCM)
    2. Turn the engine switch on (IG).
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      A118-3 (P) - Body ground
      • Engine switch on (IG)
      • Shift lever in P
      11 to 14 V
      A118-11 (R) - Body ground
      • Engine switch on (IG)
      • Shift lever in R
      11 to 14 V*
      A118-10 (N) - Body ground
      • Engine switch on (IG)
      • Shift lever in N
      11 to 14 V
      A118-20 (D) - Body ground
      • Engine switch on (IG)
      • Shift lever in D or M
      11 to 14 V
      A118-3 (P) - Body ground
      • Engine switch on (IG)
      • Shift lever not in P
      Below 1 V
      A118-11 (R) - Body ground
      • Engine switch on (IG)
      • Shift lever not in R
      Below 1 V
      A118-10 (N) - Body ground
      • Engine switch on (IG)
      • Shift lever not in N
      Below 1 V
      A118-20 (D) - Body ground
      • Engine switch on (IG)
      • Shift lever not in D or M
      Below 1 V

      HINT: 

      *: The voltage will drop slightly due to the turning on of the back up light.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (PARK/NEUTRAL POSITION SWITCH ASSEMBLY - TCM) 

    Result: 

    OK 

    See step  5

  5. REPLACE TCM 
    1. Replace the TCM.

      Refer to COMPONENTS [11/2021 - ]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    PERFORM A/T CODE REGISTRATION. Refer to  REGISTRATION [11/2021 - ]