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Home >> Lexus >> 2008 >> GS 460 >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle >> Automatic Transmission System >> DTC P0705 Transmission Range Sensor Circuit Malfunction (PRNDL Input) >> Inspection Procedure

Inspection Procedure

HINT:

Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

NOTE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.
  1. Warm up the engine.
  2. Turn the engine switch off.
  3. Connect the Techstream to the DLC3.
  4. Turn the engine switch on F (IG).
  5. Turn the Techstream on.
  6. Enter the following menus: Powertrain / ECT / Data List.
  7. According to the display on the Techstream, read the Data List.

    TCM: 

    DATA LIST

    Tester Display Measurement Item/Range Normal Condition Diagnostic Note
    Shift SW Status (R Range) Park/neutral position switch status/
    ON or OFF    		 Shift lever is:
    • ON: On R
    • OFF: Not on R
    		 When shift lever position displayed on the Techstream differs from actual position, adjustment of park/neutral position switch or shift cable may be incorrect
    Shift SW Status (P Range) Park/neutral position switch status/
    ON or OFF    		 Shift lever is:
    • ON: On P
    • OFF: Not on P
    		 When shift lever position displayed on the Techstream differs from actual position, adjustment of park/neutral position switch or shift cable may be incorrect
    Shift SW Status (N Range) Park/neutral position switch status/
    ON or OFF    		 Shift lever is:
    • ON: On N
    • OFF: Not on N
    		 When shift lever position displayed on the Techstream differs from actual position, adjustment of park/neutral position switch or shift cable may be incorrect
    Shift SW Status (D Range) Park/neutral position switch status/
    ON or OFF    		 Shift lever is:
    • ON: On D or S
    • OFF: Not on D or S
    		 When shift lever position displayed on the Techstream differs from actual position, adjustment of park/neutral position switch or shift cable may be incorrect
  1. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY 
    1. Disconnect the park/neutral position switch connector.
    2. Measure the resistance of the park/neutral position switch when the shift lever is moved to each position.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

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

    NG : REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY  (See REMOVAL  )

    Fig 1: Identifying Terminals Of Park/Neutral Position Switch Connector
    G05806231Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK : Go to Next Step 

  2. CHECK PARK/NEUTRAL POSITION SWITCH ASSEMBLY (POWER SOURCE) 
    1. Disconnect the park/neutral position switch connector.
    2. Turn the engine switch on (IG).
    3. Measure the voltage of the wire harness side connector.

      Standard voltage 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Switch Condition Specified Condition
      E49-2 (RB) - Body ground Engine switch on (IG) 11 to 14 V

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

    Fig 2: Identifying Terminals Of E77 Park/Neutral Position Switch Connector
    G05806232Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    OK : Go to Next Step 

  3. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - TCM) 
    1. Turn the engine switch on (IG).
    2. Measure the voltage of the wire harness side connector.

      Standard resistance 

      TESTER CONNECTION SPECIFIED CONDITION CHART

      Tester Connection Condition Specified Condition
      A54-3 (P) - Body ground
      • Engine switch on (IG)
      • Shift lever on P
      		 11 to 14 V
      A54-11 (R) - Body ground
      • Engine switch on (IG)
      • Shift lever on R
      		 11 to 14 V*
      A54-10 (N) - Body ground
      • Engine switch on (IG)
      • Shift lever on N
      		 11 to 14 V
      A54-20 (D) - Body ground
      • Engine switch on (IG)
      • Shift lever on D
      		 11 to 14 V
      A54-3 (P) - Body ground
      • Engine switch on (IG)
      • Shift lever not on P
      		 Below 1 V
      A54-11 (R) - Body ground
      • Engine switch on (IG)
      • Shift lever not on R
      		 Below 1 V
      A54-10 (N) - Body ground
      • Engine switch on (IG)
      • Shift lever not on N
      		 Below 1 V
      A54-20 (D) - Body ground
      • Engine switch on (IG)
      • Shift lever not on D
      		 Below 1 V
      HINT:
      *: The voltage will drop slightly due to the turning on of the back up light.
      Fig 3: Identifying Terminals Of A54 TCM Connector
      G05806233Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK : Go to Next Step 

  4. REPLACE TCM 
    1. Replace the TCM (see REMOVAL  ).

    NEXT : PERFORM ATT CODE REGISTRATION  (See REGISTRATION  )

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