Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Lexus >> 2008 >> GX 470 >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle >> Automatic Transmission System >> DTC P0705 Transmission Range Sensor Circuit Malfunction (PRNDL Input) >> Inspection Procedure

Inspection Procedure

  1. DATA LIST 

    HINT:

    According to the Data List displayed by Techstream, you can read the values of switches, sensors, actuators and so on without removing parts. Reading the Data List as the first step of troubleshooting is one method to save 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 ignition switch OFF.
    3. Connect Techstream to the DLC3.
    4. Turn the ignition switch ON, and turn the tester main switch ON.
    5. Enter the following menus. Powertrain/Engine and ECT/Data List.
    6. According to the display on the tester, read the "Data List".

      Engine and ECT 

      NORMAL CONDITION CHART

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Neutral Position SW Signal PNP switch status/ ON or OFF Shift lever is
      • On P or N ON
      • Not on P or N OFF
      		 When shift lever position displayed on Techstream differs from actual position, adjustment of PNP switch or shift cable may be incorrect
      Shift SW Status (R Range) PNP switch status/ ON or OFF Shift lever is
      • On R ON
      • Not on R OFF
      		 When shift lever position displayed on Techstream differs from actual position, adjustment of PNP switch or shift cable may be incorrect
      Shift SW Status (D Range) PNP switch status/ ON or OFF Shift lever is
      • On D ON
      • Not on D OFF
      		 When shift lever position displayed on Techstream differs from actual position, adjustment of PNP switch or shift cable may be incorrect
      Shift SW Status (4 or D) PNP switch status/ ON or OFF Shift lever is
      • On D or 4 ON
      • Not on D or 4 OFF
      		 When shift lever position displayed on Techstream differs from actual position, adjustment of PNP switch or shift cable may be incorrect
      Shift SW Status (3 Range) PNP switch status/ ON or OFF Shift lever is
      • On 3 ON
      • Not on 3 OFF
      		 When shift lever position displayed on Techstream differs from actual position, adjustment of PNP switch or shift cable may be incorrect
      Shift SW Status (2 Range) PNP switch status/ ON or OFF Shift lever is
      • On 2 ON
      • Not on 2 OFF
      		 When shift lever position displayed on Techstream differs from actual position, adjustment of PNP switch or shift cable may be incorrect
      Shift SW Status (L Range) PNP switch status/ ON or OFF Shift lever is 2 OFF
      ↓
      Shift position L switch is Pushed ON
      ↓
      Shift position L switch is Pushed OFF      		 When shift lever position displayed on Techstream differs from actual position, adjustment of PNP switch or shift cable may be incorrect
  1. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY 
    1. Jack up the vehicle.
    2. Disconnect the park/neutral position switch connector.
    3. Measure the resistance according to the value(s) in the table below when the shift lever is moved to each position.

      Standard resistance 

      RESISTANCE REFERENCE

      Shift Position Tester Connection Specified Condition
      P 2 - 6 and 4 - 5 Below 1 Ω
      Not on P ↑ 10 kΩ or higher
      R 1 - 2 Below 1 Ω
      Not on R ↑ 10 kΩ or higher
      N 2 - 9 and 4 - 5 Below 1 Ω
      Not on N ↑ 10 kΩ or higher
      D or 4 2 - 7 Below 1 Ω
      Not on D or 4 ↑ 10 kΩ or higher
      3 2 - 3 Below 1 Ω
      Not on 3 ↑ 10 kΩ or higher
      2 or L 2 - 8 Below 1 Ω
      Not on 2 or L ↑ 10 kΩ or higher
      Fig 1: Identifying Park/Neutral Position Switch Connector Terminal
      G04963268Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY 

    OK: Go to Next Step 

  2. INSPECT SHIFT LOCK CONTROL ECU (TRANSMISSION CONTROL SWITCH) 
    1. Connect the park/neutral position switch connector.
    2. Disconnect the shift lock control ECU connector.
    3. Measure the resistance according to the value(s) in the table below when the shift lever is moved to each position.

      Standard resistance 

      RESISTANCE REFERENCE

      Shift Position Tester Connection Specified Condition
      D 9 - 2 (NSSD - ATD) Below 1 Ω
      4 10 kΩ or higher
      D 9 - 3 (NSSD-AT4) 10 kΩ or higher
      4 Below 1 Ω
      2 10 - 5 (NSSL-AT2) Below 1 Ω
      L 10 kΩ or higher
      2 10 - 4 (NSSL-ATL) 10 kΩ or higher
      L Below 1 Ω
      Fig 2: Identifying Transmission Control Switch Connector Terminal
      G05261209Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    NG: REPLACE SHIFT LOCK CONTROL ECU 

    OK: Go to Next Step 

  3. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - ECM) 
    1. Connect the shift lock control ECU connector.
    2. Turn the ignition switch to the ON position, and measure the voltage according to the value(s) in the table below when the shift lever is moved to each position.
      Fig 3: Identifying Park/Neutral Position Switch Connector Terminal And ECM Connector Terminal
      G05844327Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard voltage 

      VOLTAGE SPECIFICATION

      Shift Position Tester Connection Specified Condition
      P or N E6-8 (NSW/STAR) - Body ground Below 2 V
      Not on P or N ↑ 10 to 14 V
      R E8-11 (R) - Body ground 10 to 14 V*
      Not on R ↑ Below 1 V
      D or 4 E8-21 (D) - Body ground 10 to 14 V
      Not on D or 4 ↑ Below 1 V
      4 E8-20 (4) - Body ground 10 to 14 V
      Not on 4 ↑ Below 1 V
      3 E8-19 (3) - Body ground 10 to 14 V
      Not on 3 ↑ Below 1 V
      2 or L E8-10 (2) - Body ground 10 to 14 V
      Not on 2 or L ↑ Below 1 V
      L E8-9 (L) - Body ground 10 to 14 V
      Not on L ↑ Below 1 V
      HINT:
      *: The voltage will drop slightly due to the turning on of the back up light.

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: REPLACE ECM 

scientia non olet · About Mike's Workshop Manuals